Source: AGRICOLA database (1970-1996)

Staniulis, J. B., R. E. Davis, et al. (2000). Single and mixed phytoplasma infections in phyllody- and dwarf-diseased clover plants in Lithuania. Plant Disease. [print] October 84(10): 1061-1066. {a} Molecular Plant Pathology Laboratory, United States Department of Agriculture-Agricultural Research Service (USDA-ARS), Beltsville, MD, 20705, USA

Barrell, L. G., J. L. Burke, et al. (2000). Preparation of fresh forages for incubation and prediction of nutritive value. Proceedings of the New Zealand Society of Animal Production. [print] 60: 5-8. {a} AgResearch, Grasslands Centre, Palmerston North, New Zealand

Orradottir, B., A. Helgadottir, et al. (2000). Evaluation of indigenous and exotic perennial legumes for use in land reclamation in Iceland. Buvisindi . [print] 13: 27-41. {a} Rannsoknastofnum Landbunaoarins, Keldnaholti, 112, Reykjavik, Iceland

Gong, D. and M. T. McManus (2000). Purification and characterisation of two ACC oxidases expressed differentially during leaf ontogeny in white clover. Physiologia Plantarum. [print] September 110(1): 13-21. {a} Institute of Molecular BioSciences, Massey University, Palmerston North, New Zealand

Mehravaran, H., A. Mozafar, et al. (2000). Uptake and partitioning of 32P and 65Zn by white clover as affected by eleven isolates of mycorrhizal fungi. Journal of Plant Nutrition. [print] October 23(10): 1385-1395. {a} Institute of Plant Science, Eschikon Experiment Station, Swiss Federal Institute of Technology (ETH), CH-8315, Lindau, Switzerland

Brock, J. L., K. A. Albrecht, et al. (2000). Morphology of white clover during development from seed to clonal populations in grazed pastures. Journal of Agricultural Science. [print] September 135(2): 103-111. {a} Grasslands Research Centre, AgResearch, Palmerston North, New Zealand

Hofmann, R. W., E. E. Swinny, et al. (2000). Responses of nine Trifolium repens L. Populations to ultraviolet-B radiation: Differential flavonol glycoside accumulation and biomass production. Annals of Botany London. [print] September 86(3): 527-537. {a} Grasslands Research Centre, AgResearch, Palmerston North, New Zealand

Pederson, G. A., R. G. Pratt, et al. (2000). Response to leaf inoculations with Macrophomina phaseolina in white clover. Crop Science. [print] March April 40(3): 687-692. {a} Crop Sci. Res. Lab., Waste Mgt. and Forage Res. Unit, USDA-ARS, Mississippi State, MS, 39762, USA

Meister, K. and H. P. Liebert (2000). Influence of aqueous extracts of plants from the shoreline of a reservoir on growth and element-composition of duckweeds. Journal of Applied Botany. [print] September 74(3-4): 164-167. {a} Institut fuer Allgemeine Botanik der Friedrich-Schiller-Universitaet Jena, Am Planetarium 1, D-07743, Jena, Germany

Warren, J. M. (2000). The role of white clover in the loss of diversity in grassland habitat restoration. Restoration Ecology. [print] September 8(3): 318-323. {a} Conservation and Ecology Department, SAC Aberdeen, Craibstone, Bucksburn, Aberdeen, AB21 9TS, UK

Andres, P. and M. Jorba (2000). Mitigation strategies in some motorway embankments (Catalonia, Spain). Restoration Ecology. [print] September 8(3): 268-275. {a} Centre de Recerca Ecologica i Aplicacions Forestals, (CREAF), Universitat Autonoma de Barcelona, Bellaterra, 08193, Barcelona, Spain

Rakocevic, M., H. Sinoquet, et al. (2000). Assessing the geometric structure of a white clover (Trifolium repens L.) canopy using 3-D digitising. Annals of Botany London. [print] September 86(3): 519-526. {a} Domaine des Verrines, INRA-SEPF, F-86600, Lusignan, France

Huusela, V. E. and A. Vasarainen (2000). Plant succession in perennial grass strips and effects on the diversity of leafhoppers (Homoptera, Auchenorrhyncha). Agriculture Ecosystems and Environment. [print] August 80(1-2): 101-112. {a} Plant Production Research, Plant Protection, Agricultural Research Centre, FIN-31600, Jokioinen, Finland

Ryan, M. H., D. R. Small, et al. (2000). Phosphorus controls the level of colonisation by arbuscular mycorrhizal fungi in conventional and biodynamic irrigated dairy pastures. Australian Journal of Experimental Agriculture. [print] 40(5): 663-670. {a} CSIRO Plant Industry, Canberra, ACT, 2601, Australia

Williams, T. A., M. T. Abberton, et al. (2000). Contribution of white clover varieties in high-productivity systems under grazing and cutting. Journal of Agronomy and Crop Science. [print] September 185(2): 121-128. {a} Legume Breeding Group, Institute of Grassland and Environmental Research, Aberystwyth, UK

Pederson, G. A. and G. E. Brink (2000). Seed production of white clover cultivars and naturalized populations when grown in a pasture. Crop Science. [print] July August 40(4): 1109-1114. {a} ARS, Crop Sci. Res. Lab., Waste Mgmt. and Forage Res. Unit, USDA, 810 Hwy 12 E, Mississippi State, MS, 39762-5367, USA

Jahufer, M. Z. Z. and F. I. Gawler (2000). Genotypic variation for seed yield components in white clover (Trifolium repens L.). Australian Journal of Agricultural Research. [print] 51(6): 657-663. {a} Agriculture Victoria Pastoral and Veterinary Institute, Hamilton, Vic., 3300, Australia

Leeflang, L. (2000). Response of Trifolium repens to a mosaic of bare and vegetated patches. Plant Species Biology. [print] April 15(1): 59-65. {a} Department of Plant Ecology and Evolutionary Biology, Utrecht University, 3508 TB, Utrecht, Netherlands

Schulte, D. and W. Hengstenberg (2000). Engineering the active center of the 6-phospho-beta-galactosidase from Lactococcus lactis. Protein Engineering. [print] July 13(7): 515-518. {a} Arbeitsgruppe Physiologie der Mikroorganismen, Department of Biology, Ruhr-Universitaet Bochum, D-44780, Bochum, Germany

Ramirez, P. A. H., S. E. Buntinx, et al. (2000). Effect of breed and age on the voluntary intake and the micromineral status of non-pregnant sheep. II. Micromineral status. Small Ruminant Research. [print] August 37(3): 231-242. {a} Departamento de Nutricion, Facultad de Medicina Veterinaria y Zootecnia, Universidad Nacional Autonoma de Mexico, Mexico, D.F., 04510, Mexico

Ramirez, P. A. H., S. E. Buntinx, et al. (2000). Effect of breed and age on the voluntary intake and the micromineral status of non-pregnant sheep. 1. Estimation of voluntary intake. Small Ruminant Research. [print] August 37(3): 223-229. {a} Departamento de Nutricion, Facultad de Medicina Veterinaria y Zootecnia, Universidad Nacional Autonoma de Mexico, Mexico City, D.F., 04510, Mexico

Staley, T. E. and P. W. Voigt (2000). Methodological considerations for elucidating low-level liming effects on white clover symbiosis establishment in an acidic soil model system. Soil Science. [print] July 165(7): 567-577. {a} ARS-NAA, Appalachian Farming Systems Research Center, USDA, 1224 Airport Rd., Beaver, WV, 25813-9423, USA

Roehricht, W. and T. Peschel (1999). Sheep fescue-rich turf grasses in Berlin and Brandenburg. Verhandlungen des Botanischen Vereins von Berlin und Brandenburg. [print] 132: 253-266. {a} Strasse 43 Nr. 48, D-13125, Berlin, Germany

Brummer, E. C. and K. J. Moore (2000). Persistence of perennial cool-season grass and legume cultivars under continuous grazing by beef cattle. Agronomy Journal. [print] May June 92(3): 466-471. {a} Agron. Dep., Iowa State Univ., Ames, IA, 50011, USA

Bryan, W. B., E. C. Prigge, et al. (2000). Productivity of Kentucky bluegrass pasture grazed at three heights and two intensities. Agronomy Journal. [print] January February 92(1): 30-35. {a} Div. Plant Soil Sci., West Virginia Univ., Morgantown, WV, 26506-6108, USA

Lange, O. and W. M. T. Schifino (2000). Isozyme variation in wild and cultivated species of the genus Trifolium L. (Leguminosae). Annals of Botany London. [print] Aug 86(2): 339-345. {a} Departamento de Plantas Forrageiras e Agrometeorologia, Faculdade de Agronomia, Universidade Federal do Rio Grande do Sul, 91501-970, Porto Alegre, RS, Brazil

Cowan, A. A., A. H. Marshall, et al. (2000). Effect of pollen competition and stigmatic receptivity on seed set in white clover (Trifolium repens L.). Sexual Plant Reproduction. [print] July 13(1): 37-42. {a} Institute of Grassland and Environmental Research, Plas Gogerddan, Aberystwyth, Ceredigion, SY23 3EB, UK

Christiansen, P., J. M. Gibson, et al. (2000). Transgenic Trifolium repens with foliage accumulating the high sulphur protein, sunflower seed albumin. Transgenic Research. [print] April 9(2): 103-113. {a} Danish Plant Breeding, DLF-Trifolium, Hojerupvej 31, DK-4660, Store Heddinge, Denmark

Blanco, O. M. A., S. A. K. Spross, et al. (2000). Intraruminal mineral selenium boluses evaluation through blood and wool selenium concentration in grassing lambs. Veterinaria Mexico. [print] Abril Junio 31(2): 121-127. {a} Departamento de Produccion Animal: Rumiantes, Facultad de Medicina Veterinaria y Zootecnia, Universidad Nacional Autonoma de Mexico, 04510, Mexico, DF, Mexico

Bulinska, R. Z. (2000). Morphological relationships among 15 species of Trifolium occurring in Poland. Genetic Resources and Crop Evolution. [print] June 47(3): 267-272. {a} Plant Breeding and Acclimatization Institute, Radzikow, 05-870, Blonie, Poland

Burgess, C. P., R. Chapman, et al. (2000). Shallow mechanical loosening of a soil under dairy cattle grazing: Effects on soil and pasture. New Zealand Journal of Agricultural Research. [print] June 43(2): 279-290. {a} Dairying Research Corporation, Hamilton, New Zealand

Drewry, J. J., J. A. H. Lowe, et al. (2000). Effect of subsoiling on soil physical properties and pasture production on a Pallic Soil in Southland, New Zealand. New Zealand Journal of Agricultural Research. [print] June 43(2): 269-277. {a} AgResearch, C/- Soil and Physical Sciences Group, Soil, Plant and Ecological Sciences Division, Lincoln University, Canterbury, New Zealand

Drewry, J. J. and R. J. Paton (2000). Effect of subsoiling on soil physical properties and dry matter production on a Brown Soil in Southland, New Zealand. New Zealand Journal of Agricultural Research. [print] June 43(2): 259-268. {a} AgResearch, C/- Soil and Physical Sciences Group, Soil, Plant and Ecological Sciences Division, Lincoln University, Canterbury, New Zealand

Ball, G. R., B. D. Palmer, et al. (2000). Identification of non-linear influences on the seasonal ozone dose-response of sensitive and resistant clover clones using artificial neural networks. Ecological Modelling. [print] 129(2-3): 153-168. {a} Department of Computing, Faculty of Engineering and Computing, Nottingham Trent University, Burton Street, Nottingham, NG1 4BU, UK

Almeida, J. P. F., U. A. Hartwig, et al. (2000). Evidence that P deficiency induces N feedback regulation of symbiotic N2 fixation in white clover (Trifolium repens L.). Journal of Experimental Botany. [print] July 51(348): 1289-1297. {a} Institute of Plant Sciences, Swiss Federal Institute of Technology, Universitatstrasse 2, 8092, Zurich, Switzerland

de, M. J., J. J. Weinman, et al. (2000). Anthocyanin regulatory gene expression in transgenic white clover can result in an altered pattern of pigmentation. Australian Journal of Plant Physiology. [print] 27(7): 659-667. {a} Division of Plant Industry, CSIRO, Canberra, ACT, 2601, Australia

Foo, L. Y., Y. Lu, et al. (2000). The phenols and prodelphinidins of white clover flowers. Phytochemistry Oxford. [print] June 54(5): 539-548. {a} Industrial Research, Lower Hutt, New Zealand

Elgersma, A., H. Schlepers, et al. (2000). Interactions between perennial ryegrass (Lolium perenne L.) and white clover (Trifolium repens L.) under contrasting nitrogen availability: Productivity, seasonal patterns of species composition, N2 fixation, N transfer and N recovery. Plant and Soil. [print] 221(2): 281-299. {a} C.T. de Wit Graduate School for Production Ecology and Resource Conservation (PE and RC), Group Crop and Weed Ecology, Wageningen University, Haarweg 333, 6709 RZ, Wageningen, Netherlands

Jones, R. M., G. A. Bunch, et al. (2000). A visual procedure for estimating stolon length of white clover per unit area in grazed pastures. New Zealand Journal of Agricultural Research. [print] June 43(2): 291-294. {a} CSIRO Tropical Agriculture, Meiers Rd, Indooroopilly, QLD, 4068, Australia

Burggraaf, V. T. and E. R. Thom (2000). Contamination and persistence of endophyte-free ryegrass pastures established by spray-drilling, and intensively grazed by dairy cows in the Waikato region of New Zealand. New Zealand Journal of Agricultural Research. [print] June 43(2): 163-173. {a} Dairying Research Corporation, Hamilton, New Zealand

Caradus, J. R., D. R. Woodfield, et al. (2000). Response to selection for node appearance rate of white clover. New Zealand Journal of Agricultural Research. [print] June 43(2): 157-162. {a} AgResearch Grasslands, Palmerston North, New Zealand

Mosquera, M. R. and R. A. Gonzalez (1999). Management effect on sward evolution in dairy systems. Investigacion Agraria Produccion y Proteccion Vegetales. [print] 14(1-2): 101-106. {a} Escuela Politecnica Superior, Universidad de Santiago de Compostela, Campus de Lugo, 27002, Lugo, Spain

McGorum, B. C., S. C. Fry, et al. (2000). Properties of herbage in relation to equine dysautonomia: Biochemical composition and antioxidant and prooxidant actions. Journal of Agricultural and Food Chemistry. [print] June 48(6): 2346-2352. {a} Easter Bush Veterinary Centre, University of Edinburgh, Edinburgh, UK

Kakes, P. and A. N. Chardonnens (2000). Cyanotypic frequencies in adjacent and mixed populations of Trifolium occidentale Coombe and Trifolium repens L. are regulated by different mechanisms. Biochemical Systematics and Ecology. [print] August 28(7): 633-649. {a} Ecology and Ecotoxicology of Plants, Faculty of Biology, Vrije Universiteit, De Boelelaan 1087, 1081 HV, Amsterdam, Netherlands

Mills, G., G. Ball, et al. (2000). Development of a multi-factor model for predicting the effects of ambient ozone on the biomass of white clover. Environmental Pollution. [print] 109(3): 533-542. {a} Bangor Research Unit, Institute of Terrestrial Ecology, Deiniol Road, Bangor, LL57 2UP, UK

Postiglione, L., M. Fagnano, et al. (2000). Response to ambient ozone of two white clover (Trifolium repens L.cv. "Regal") clones, one resistant and one sensitive, grown in a Mediterranean environment. Environmental Pollution. [print] 109(3): 525-531. {a} Dipartimento Ingegneria Agraria ed Agronomia del Territorio, Universita di Napoli, Via Universita 100, I-80055, Portici, NA, Italy

Min, B. R., W. C. McNabb, et al. (2000). Solubilization and degradation of ribulose-1,5-bisphosphate carboxylase/oxygenase (EC 4.1.1.39; Rubisco) protein from white clover (Trifolium repens) and Lotus corniculatus by rumen microorganisms and the effect of condensed tannins on these processes. Journal of Agricultural Science. [print] May 134(3): 305-317. {a} Nutrition and Behavior Group, AgResearch, Grasslands Research Centre, Palmerston North, New Zealand

Hayes, J. E., R. J. Simpson, et al. (2000). The growth and phosphorus utilisation of plants in sterile media when supplied with inositol hexaphosphate, glucose 1-phosphate or inorganic phosphate. Plant and Soil. [print] 220(1-2): 165-174. {a} CSIRO Plant Industry, Canberra, ACT, 2601, Australia

Pol, M., D. Golebiowska, et al. (1999). Influence of enhanced concentration of carbon dioxide and moderate drought on fluorescence induction in white clover (Trifolium repens L.). Photosynthetica Prague. [print] 37(4): 537-542. {a} Department of Physics, University of Agriculture, ul. Papieza Pmvla VI nr. 3, 71-459, Szczecin, Poland

Arsenos, G., D. Zygoyjannis, et al. (2000). The effect of breed slaughter weight and nutritional management on cholesterol content of lamb carcasses. Small Ruminant Research. [print] June 36(3): 275-283. {a} Department of Management and Health, Animal Biology Division, Scottish Agricultural College, Bush-Estate, Penicuik, EH26 OPH, UK

Scott, J. M., K. J. Hutchinson, et al. (2000). Quantifying the sustainability of grazed pastures on the Northern Tablelands of New South Wales. Australian Journal of Experimental Agriculture. [print] 40(2): 257-265. {a} Agronomy and Soil Science, University of New England, Armidale, NSW, 2351, Australia

Kowalenko, C. G. and S. Bittman (2000). Within-season grass yield and nitrogen uptake, and soil nitrogen as affected by nitrogen applied at various rates and distributions in a high rainfall environment. Canadian Journal of Plant Science. [print] April 80(2): 287-301. {a} Pacific Agri-Food Research Centre, Agriculture and Agri-Food Canada, Agassiz, BC, V0M 1A0, Canada

Bittman, S. and C. G. Kowalenko (2000). Within-season grass herbage crude-protein- and nitrate-N concentrations as affected by rates and seasonal distribution of fertilizer nitrogen in a high yearly rainfall climate. Canadian Journal of Plant Science. [print] April 80(2): 277-285. {a} Pacific Agri-Food Research Centre, Agriculture and Agri-Food Canada, Agassiz, BC, V0M 1A0, Canada

Greer, D. H., W. A. Laing, et al. (2000). The effect of perturbations in temperature and photon flux density on the growth and photosynthetic responses of five pasture species to elevated CO2. Australian Journal of Plant Physiology. [print] 27(4): 301-310. {a} HortResearch, Palmerston North Research Centre, Palmerston North, New Zealand

Min, B. M. and J. H. Kim (2000). Plant succession and interaction between soil and plants after land reclamation on the west coast of Korea. Journal of Plant Biology. [print] March 43(1): 41-47. {a} Department of Science Education, Dankook University, Seoul, 140-714, South Korea

Strong, W. L. (2000). Vegetation development on reclaimed lands in the Coal Valley Mine of western Alberta, Canada. Canadian Journal of Botany. [print] Jan 78(1): 110-118. {a} Department of Geography, University of Calgary, 2500 University Drive N.W., Calgary, AB, T2N 1N4, Canada

Pol, M., D. Golebiowska, et al. (2000). Analysis of an influence of enhanced concentration of carbon dioxide (700 ppm) and moderate drought on the parameters of fluorescence induction at white clover (Trifolium repens L.). Bulletin of the Polish Academy of Sciences Biological Sciences. [print] March 48(1): 21-27. {a} Department of Physics, University of Agriculture, Ul. Papieza Pawla Vi Nr 3, 71-459, Szczecin, Poland

Zhang, C. and M. T. McManus (2000). Identification and characterisation of two distinct acid phosphatases in cell walls of roots of white clover. Plant Physiology and Biochemistry Paris. [print] April 38(4): 259-270. {a} Institute of Molecular BioSciences, Massey University, Palmerston North, New Zealand

Schulz, S., J. D. H. Keatinge, et al. (2000). Effect of legume management on forage production and residual effects on upland rice. Journal of Agronomy and Crop Science. [print] May 184(3): 173-180. {a} International Institute of Tropical Agriculture (IITA), Ibadan, Nigeria

Lawrence, M. J. (2000). Population genetics of the homomorphic self-incompatibility polymorphisms in flowering plants. Annals of Botany London. March 85(Suppl. A): 221-226. {a} Wolfson Laboratory for Plant Molecular Biology, Plant Genetics and Cell Biology Group, School of Biosciences, University of Birmingham, Birmingham, B15 2TT, UK

Mercer, C. F., D. B. J. Van, et al. (2000). Progress in recurrent selection and in crossing cultivars with white clover resistant to the clover root-knot nematode Meloidogyne trifoliophila. New Zealand Journal of Agricultural Research. March 43(1): 41-48. {a} AgResearch Grasslands, Palmerston North, New Zealand

Tava, A. and P. Annicchiarico (2000). Spectrophotometer-aided evaluation of cyanogenic potential in white clover (Trifolium repens L.). Phytochemical Analysis. May June 11(3): 169-173. {a} Istituto Sperimentale per le Colture Foraggere, viale Piacenza 29, 26900, Lodi, Italy

Sawada, H., H. Hatanaka, et al. (2000). Within-inflorescence variation in seed set of white clover (Trifolium repens L.) and its consequence for seed size variation. Grassland Science. Jan. 45(4): 329-334. {a} Faculty of Agriculture, Shizuoka University, Ooya 836, Shizuoka, 422-8529, Japan

Hopkins, A., M. G. Lambert, et al. (2000). Determination of management and topographic influences on the balance between resident and 'Grasslands Huia' white clover (Trifolium repens) in an upland pasture using isozyme analysis. Journal of Agricultural Science. March 134(2): 137-145. {a} Grasslands Research Centre, AgResearch, Palmerston North, New Zealand

Brant, V., J. Santrucek, et al. (2000). The effect of different ways and frequency of harvesting of set aside arable land on the weed infestation. Zeitschrift fuer Pflanzenkrankheiten und Pflanzenschutz(17): 105-112. {a} Tschechische Landw. Universitat, CZ-165 21, Prag 6-Suchdol, Czech Republic

Rigueiro, R. A., L. M. R. Mosquera, et al. (2000). Pasture production and tree growth in a young pine plantation fertilized with inorganic fertilizers and milk sewage in northwestern Spain. Agroforestry Systems 48(3): 245-256. {a} Departamento de Produccion Vegetal, Escuela Politecnica Superior, Lugo, 27002, Spain

Marchiol, L., S. Cesco, et al. (2000). Germination and initial root growth of four legumes as affected by landfill biogas atmosphere. Restoration Ecology. March 8(1): 93-98. {a} Dipartimento di Produzione Vegetale e Tecnologie Agrarie, Universita di Udine, Via delle Scienze 208, 33100, Udine, Italy

Ye, Z. H., J. W. C. Wong, et al. (2000). Revegetation of Pb/Zn mine tailings, Guangdong Province, China. Restoration Ecology. March 8(1): 87-92. {a} Department of Biology, Institute for Natural Resources and Waste Management, Hong Kong Baptist University, Kowloon Tong, Hong Kong, China

Mullen, R. W., S. B. Phillips, et al. (2000). Forage yield and crude protein of interseeded legume-bermudagrass mixtures as affected by phosphorus fertilizer. Journal of Plant Nutrition. May 23(5): 673-681. {a} Department of Plant and Soil Science, Oklahoma State University, 044 Agriculture Hall, Stillwater, OK, 74078, USA

Finne, M. A., O. A. Rognli, et al. (2000). Genetic variation in a Norwegian germplasm collection of white clover (Trifolium repens L.). Euphytica 112(1): 57-68. {a} Holt Research Centre, The Norwegian Crop Research Institute, N-9002, Tromso, Norway

Finne, M. A., O. A. Rognli, et al. (2000). Genetic variation in a Norwegian germplasm collection of white clover (Trifolium repens L.). Euphytica 112(1): 45-56. {a} Holt Research Centre, The Norwegian Crop Research Institute, N-9002, Tromso, Norway

Finne, M. A., O. A. Rognli, et al. (2000). Genetic variation in a Norwegian germplasm collection of white clover (Trifolium repens L.). Euphytica 112(1): 33-44. {a} Holt Research Centre, The Norwegian Crop Research Institute, N-9002, Tromso, Norway

Lodge, G. M. (2000). Competition among seedlings of perennial grasses, subterranean clover, white clover, and annual ryegrass in replacement series mixtures. Australian Journal of Agricultural Research 51(3): 377-383. {a} Tamworth Centre for Crop Improvement, NSW Agriculture, RMB 944, Tamworth, NSW, 2340, Australia

Paine, L. K., D. Undersander, et al. (1999). Pasture growth, production, and quality under rotational and continuous grazing management. Journal of Production Agriculture. Oct. Dec. 12(4): 569-577. {a} Columbia County Extension, Univ. of Wisconsin, Portage, WI, 53901, USA

Gautier, H., R. Mech, et al. (2000). 3D architectural modelling of aerial photomorphogenesis in white clover (Trifolium repens L.) using L-systems. Annals of Botany London. March 85(3): 359-370. {a} Departement Environnement et Agronomie, Station d'Ecophysiologie des Plantes Fourrageres (SEPF), INRA, 86600, Lusignan, France

Watson, C. A., J. M. Ross, et al. (2000). Environment-induced modifications to root longevity in Lolium perenne and Trifolium repens. Annals of Botany London. March 85(3): 397-401. {a} Land Management Department, Environmental Division, SAC, Craibstone Estate, Aberdeen, AB21 9YA, UK

Abdin, O. A., X. M. Zhou, et al. (2000). Cover crops and interrow tillage for weed control in short season maize (Zea mays). European Journal of Agronomy. March 12(2): 93-102. {a} Department of Plant Science, McGill University, 21111 Lakeshore Road, Macdonald Campus, Ste. Anne de Bellevue, Quebec, H9X 3V9, Canada

Silva, R. G., K. C. Cameron, et al. (2000). Effect of macropore flow on the transport of surface-applied cow urine through a soil profile. Australian Journal of Soil Research 38(1): 13-23. {a} Centre for Soil and Environmental Quality, Lincoln University, Canterbury, New Zealand

Hanninen, K., R. Ohtonen, et al. (1999). Effects of leguminous ground cover competition on red birch and soil nutrient status in the nursery. Plant and Soil 216(1-2): 129-138. {a} Hame Polytechnic Lepaa, FIN-14610, Lepaa, Finland

Baggs, E. M., C. A. Watson, et al. (2000). The fate of nitrogen from incorporated cover crop and green manure residues. Nutrient Cycling in Agroecosystems. Feb. 56(2): 153-163. {a} Department of Biological Sciences, Wye College, University of London, Wye, Ashford, Kent, TN25 5AH, UK

Williams, P. H. and R. J. Haynes (2000). Transformations and plant uptake of urine N and S in long and short-term pastures. Nutrient Cycling in Agroecosystems. Feb. 56(2): 109-116. {a} Canterbury Agriculture and Science Centre, New Zealand Institute for Crop and Food Research Ltd, Christchurch, New Zealand

Annicchiarico, P. and E. Piano (2000). Response of white clover genotypes to evaluation environments of dense and spaced planting, and implications for selection. Euphytica 111(2): 111-120. {a} Istituto Sperimentale per le Colture Foraggere, 29 Viale Piacenza, I-26900, Lodi, Italy

McLaughlin, M. R. and G. A. Pederson (2000). Registration of PSVR1 white clover germplasm. Crop Science. Jan. Feb. 40(1): 298-299. {a} Crop Science Res. Lab., Waste Management and Forage Res. Unit, USDA-ARS, Mississippi State, MS, 39762-5367, USA

Casler, M. D. and S. E. van (2000). Patterns of variation in a collection of meadow fescue accessions. Crop Science. Jan. Feb. 40(1): 248-255. {a} Dep. of Agronomy, Univ. of Wisconsin-Madison, Madison, WI, 53706-1597, USA

Brandsaeter, L. O., T. Smeby, et al. (2000). Winter annual legumes for use as cover crops in row crops in northern regions: II. Frost resistance study. Crop Science. Jan. Feb. 40(1): 175-181. {a} Plant Protection Centre, Dep. of Herbology, Norwegian Crop Research Institute, N-1432, Aas, Norway

Eriksen, J. and M. Askegaard (2000). Sulphate leaching in an organic crop rotation on sandy soil in Denmark. Agriculture Ecosystems and Environment. April 78(2): 107-114. {a} Department of Crop Physiology and Soil Science, Danish Institute of Agricultural Sciences, DK-8830, Tjele, Denmark

Heraut, B. V., C. Robin, et al. (1999). Light quality (red:far-red ratio): Does it affect photosynthetic activity, net CO2 assimilation, and morphology of young white clover leaves? Canadian Journal of Botany. Oct. 77(10): 1425-1431. {a} Unite associee de l'Institut National de la Recherche Agronomique, Agronomie et Environnement, ENSAIA, Vandoeuvre-les-Nancy Cedex, F-54505, France

Min, B. M. and J. H. Kim (1999). Plant distribution in relation to soil properties of reclaimed lands on the west coast of Korea. Journal of Plant Biology. Dec. 42(4): 279-286. {a} Department of Science Education, Dankook University, Seoul, 140-714, South Korea

Montalbini, P. (2000). Xanthine dehydrogenase from leaves of leguminous plants: Purification, characterization and properties of the enzyme. Journal of Plant Physiology. Jan. 156(1): 3-16. {a} Istituto di Patologia vegetale, Universita di Perugia, Borgo XX Giugno 74, 06121, Perugia, Italy

Concha, M. A. and A. M. Nicol (2000). Selection by sheep and goats for perennial ryegrass and white clover offered over a range of sward height contrasts. Grass and Forage Science. March 55(1): 47-58. {a} Animal and Food Sciences Division, Lincoln University, Canterbury, New Zealand

Muto, P. J. and R. C. Martin (2000). Effects of pre-treatment, renovation procedure and cultivar on the growth of white clover sown into a permanent pasture under both grazing and mowing regimes. Grass and Forage Science. March 55(1): 59-68. {a} Department of Plant Science, Nova Scotia Agricultural College, Truro, Nova Scotia, B2N 5E3, Canada

Laidlaw, A. S., C. J. Watson, et al. (2000). Implications of nitrogen fertilizer applications and extended grazing for the N economy of grassland. Grass and Forage Science. March 55(1): 37-46. {a} Plant Testing Station, 50 Houston Road, Crossnacreevy, Belfast, BT6 9SH, UK

Vinther, F. P. and E. S. Jensen (2000). Estimating legume N2 fixation in grass-clover mixtures of a grazed organic cropping system using two 15N methods. Agriculture Ecosystems and Environment. April 78(2): 139-147. {a} Department Soil Science and Plant Physiology, Research Centre Foulum, Danish Institute of Agricultural Sciences, DK-8830, Tjele, Denmark

Hoveland, C. S., J. H. Bouton, et al. (2000). Fungal endophyte effects on production of legumes in association with tall fescue. Agronomy Journal. Nov. Dec. 91(6): 897-902. {a} Dep. of Crop and Soil Sci., Univ. of Georgia, Athens, GA, 30602, USA

Sanderson, M. A. and G. F. Elwinger (2000). Grass species and cultivar effects on establishment of grass-white clover mixtures. Agronomy Journal. Nov. Dec. 91(6): 889-897. {a} ARS Pasture Systems and Watershed Management Res. Lab., USDA, Curtin Rd., Bldg. 3702, University Park, PA, 16802-3702, USA

Adams, W. A. and M. T. Jan (1999). Utilization of nitrogen accumulated by a clover containing ley following cultivation. Soil Use and Management. Dec. 15(4): 247-253. {a} Soil Science Unit, Institute of Biological Sciences, University of Wales, Aberystwyth, SY23 3DE, UK

Lindroth, R. L., R. W. Hofmann, et al. (2000). Population differences in Trifolium repens L. response to ultraviolet-B radiation: Foliar chemistry and consequences for two lepidopteran herbivores. Oecologia Berlin. Jan. 122(1): 20-28. {a} Department of Entomology, University of Wisconsin, 1630 Linden Dr., 237 Russell Labs, Madison, WI, 53706, USA

Stout, W. L., S. L. Fales, et al. (2000). Water quality implications of nitrate leaching from intensively grazed pasture swards in the northeast US. Agriculture Ecosystems and Environment. Feb. 77(3): 203-210. {a} Pasture Systems and Watershed Management Research Laboratory, United States Department of Agriculture/Agricultural Research Service, Curtin Road, University Park, PA, 16802-3702, USA

Pavao, Z. M. A., J. C. Waller, et al. (1999). Methane emissions of beef cattle grazing tall fescue pastures at three levels of endophyte infestation. Journal of Environmental Quality. Nov. Dec. 28(6): 1963-1969. {a} Dep. Plant and Soil Sciences, Univ. of Tennessee, Knoxville, TN, 37901-1071, USA

Wang, S. and R. D. Riggs (1999). Variations in host preference among and within populations of Heterodera trifolii and related species. Journal of Nematology. Dec. 31(4): 407-417. {a} Department of Plant Pathology, University of Arkansas, Fayetteville, AR, 72701, USA

McManus, M. T., R. L. Bieleski, et al. (2000). Pinitol accumulation in mature leaves of white clover in response to a water deficit. Environmental and Experimental Botany. Feb. 43(1): 11-18. {a} Institute of Molecular BioSciences, Massey University, Palmerston North, New Zealand

McKenzie, M. J., V. Mett, et al. (1999). Modified ELISA for the detection of neomycin phosphotransferase II in transformed plant species. Plant Cell Reports. Jan. 19(3): 286-289. {a} College of Sciences, Institute of Molecular BioSciences, Massey University, Palmerston North, New Zealand

Kakes, P. and H. W. J. Hakvoort (1999). Aglycon specificity of the cyanogenic beta-glucosidases of leaves of Trifolium species and Cassava (Manihot esculenta). Thaiszia 9(1): 73-80. {a} Faculty of Biology, Department of Ecology and Ecotoxicology, Free University, de Boelelaan 1087, 1081 HV, Amsterdam, Netherlands

Viette, M., C. Tettamanti, et al. (2000). Preference for acyanogenic white clover (Trifolium repens) in the vole Arvicola terrestris. II. Generalization and further investigations. Journal of Chemical Ecology. Jan. 26(1): 101-122. {a} Department of Biology, Ecology and Biology of Organisms, University of Fribourg, Perolles, CH-1700, Fribourg, Switzerland

Scott, D. (1999). Sustainability of New Zealand high-country pastures under contrasting development inputs. 1. Site, and shoot nutrients. New Zealand Journal of Agricultural Research. Dec. 42(4): 365-383. {a} AgResearch, Lincoln, New Zealand

Mercer, C. F., D. B. J. Van, et al. (1999). Effectiveness of recurrent selection of white clover (Trifolium repens) for resistance to New Zealand populations of clover cyst nematode (Heterodera trifolii). Nematology . Aug. 1(5): 449-455. {a} AgResearch Grasslands, Palmerston North, New Zealand

Cosgrove, G. P. and J. H. Niezen (2000). Intake and selection for white clover by grazing lambs in response to gastrointestinal parasitism. Applied Animal Behaviour Science. Feb. 66(1-2): 71-85. {a} Grasslands Research Centre, AgResearch, Palmerston North, New Zealand

Zhu, W. Y., S. A. H. Kingston, et al. (1999). Evidence of a role for plant proteases in the degradation of herbage proteins in the rumen of grazing cattle. Journal of Dairy Science. Dec. 82(12): 2651-2658. {a} Institute of Grassland and Environmental Research, Plas Gogerddan, Aberystwyth, Ceredigion, SY23 3EB, UK

Wasilowska, A. (1999). Spreading of alien plant species along tourist tracks in Karkonosze Mts. Polish Journal of Ecology 47(4): 399-408. {a} Department of Bioindication, Institute of Ecology, Polish Academy of Sciences, Dziekanow Lesny near Warsaw, 05-092, Lomianki, Poland

Carmona, D. M. and D. A. Landis (1999). Influence of refuge habitats and cover crops on seasonal activity-density of ground beetles (Coleoptera: Carabidae) in field crops. Environmental Entomology. Dec. 28(6): 1145-1153. {a} Facultad de Ciencias Agrarias, UNMdP-INTA Balcarce, Balcarce, Buenos Aires, Argentina

Stoyanova, M. (1999). Medicinal and forest-fruit species from the southern Rila Mountain. Nauka za Gorata: 36-39. {a} Forest Research Institute, Sofia, Bulgaria

Hayes, J. E., A. E. Richardson, et al. (1999). Phytase and acid phosphatase activities in extracts from roots of temperate pasture grass and legume seedlings. Australian Journal of Plant Physiology 26(8): 801-809. {a} CSIRO Plant Industry, Canberra, ACT, 2601, Australia

Stockdale, C. R. (1999). Effect of length of the period of supplementation with concentrates on pasture intake and performance of grazing dairy cows. Australian Journal of Experimental Agriculture 39(7): 803-809. {a} Department of Natural Resources and Environment, Kyabram Dairy Centre, Institute of Sustainable Irrigated Agriculture, 120 Cooma Road, Kyabram, VIC, 3620, Australia

Brink, G. E., G. A. Pederson, et al. (1999). Growth of white clover ecotypes, cultivars, and germplasms in the southeastern USA. Crop Science. Nov. Dec. 39(6): 1809-1814. {a} USDA-ARS, Mississippi State, MS, 39762, USA

Corbel, G., C. Robin, et al. (1999). Regrowth of white clover after chilling: Assimilate partitioning and vegetative storage proteins. Crop Science. Nov. Dec. 39(6): 1756-1761. {a} Unite Associee "Agronomie et Environnement", E.N.S.A.I.A.-INRA, 54505, Vandoeuvre-les-Nancy Cedex, France

Blumenthal, M. J., A. M. Bowman, et al. (1999). Establishment, growth and persistence of greater lotus (Lotus uliginosus) at six sites in eastern Australia. Australian Journal of Experimental Agriculture 39(7): 819-827. {a} NSW Agriculture, Orange, NSW, 2800, Australia

Martin, R. C., P. R. Greyson, et al. (1999). Competition between corn and a living mulch. Canadian Journal of Plant Science. Oct. 79(4): 579-586. {a} Plant Science Department, Nova Scotia Agricultural College, Truro, Nova Scotia, B2N 5E3, Canada

Zhu, Y. G., A. S. Laidlaw, et al. (2000). The specificity of arbuscular mycorrhizal fungi in perennial ryegrass-white clover pasture. Agriculture Ecosystems and Environment. Feb. 77(3): 211-218. {a} Department of Soil Science, University of Adelaide, Glen Osmond, SA, 5064, Australia

Worland, S., N. Guerreiro, et al. (1999). Rhizobium purine auxotrophs, perturbed in nodulation, have multiple changes in protein synthesis. Australian Journal of Plant Physiology 26(6): 511-519. {a} Plant Microbe Interaction Group, Research School of Biological Sciences, Australian National University, Canberra, ACT, Australia

van, d. W. T. J., R. R. Sherlock, et al. (1999). Nitrous oxide emissions and methane oxidation by soil following cultivation of two different leguminous pastures. Biology and Fertility of Soils. Nov. 30(1-2): 52-60. {a} Soil, Plant and Ecological Sciences Division, Lincoln University, Canterbury, New Zealand

Henwood, B. P. (1999). Observations on the life history of Phyllonorycter nigrescentella (Logan, 1851) (Lepidoptera: Gracillariidae). Entomologist's Gazette. Oct. 50(4): 288. {a} 6 Lakeland, Abbotskerswell, Newton Abbot, Devon, UK

Smith, J. D., L. A. Staehelin, et al. (1999). Early root cap development and graviresponse in white clover (Trifolium repens) grown in space and on a two-axis clinostat. Journal of Plant Physiology. Oct. 155(4-5): 543-550. {a} Space Life Sciences Research Branch, NASA Ames Research Center, Moffett Field, CA, USA

Chiy, P. C. and C. J. C. Phillips (1999). Effects of sodium fertiliser on the distribution of trace elements, toxic metals and water-soluble carbohydrates in grass and clover fractions. Journal of the Science of Food and Agriculture. Nov. 79(14): 2017-2024. {a} Department of Clinical Veterinary Medicine, University of Cambridge, Cambridge, CB3 0ES, UK

Almeida, J. P. F., A. Luscher, et al. (1999). Partitioning of P and the activity of root acid phosphatase in white clover (Trifolium repens L.) are modified by increased atmospheric CO2 and P fertilisation. Plant and Soil 210(2): 159-166. {a} Escola Superior Agraria, I.P., 6000, Castelo Branco, Portugal

Wardle, D. A., K. I. Bonner, et al. (1999). Plant removals in perennial grassland: Vegetation dynamics, decomposers, soil biodiversity, and ecosystem properties. Ecological Monographs. Nov. 69(4): 535-568. {a} Landcare Research, Lincoln, 8152, New Zealand

Saito, M. (1999). Mycorrhizal symbiosis in grassland ecosystem. Japanese Journal of Ecology Otsu. Aug. 49(2): 139-144. {a} National Grassland Research Institute, Nishi-nasuno, Tochigi, 329-2793, Japan

Realini, C. E., J. Hodgson, et al. (1999). Effect of sward surface height on herbage intake and performance of finishing beef cattle. New Zealand Journal of Agricultural Research. June 42(2): 155-164. {a} Institute of Natural Resources, Massey University, Palmerston North, New Zealand

Mosquera, L. R. and R. A. Gonzalez (1999). Pasture production in Northern Spain dairy systems. New Zealand Journal of Agricultural Research. June 42(2): 125-132. {a} Departamento de Produccion Vegetal Escuela Politecnica Superior de Ingenieros Agronomos, Universidade de Santiago de Compostela, Campus de Lugo, 27002, Lugo, Spain

Pederson, G. A., G. E. Brink, et al. (1999). Growth of United States versus New Zealand white clover cultivars in diverse grasses in Mississippi, USA. New Zealand Journal of Agricultural Research. June 42(2): 115-123. {a} Crop Science Res. Lab. Waste Mgt. and Forage Res. Unit, USDA-ARS, Mississippi State, MS, 39762, USA

Di, H. J., K. C. Cameron, et al. (1999). Contributions to nitrogen leaching and pasture uptake by autumn-applied dairy effluent and ammonium fertilizer labeled with 15N isotope. Plant and Soil 210(2): 189-198. {a} Centre for Soil and Environmental Quality, Lincoln University, Canterbury, New Zealand

Lucero, D. W., P. Grieu, et al. (1999). Effects of water deficit and plant interaction on morphological growth parameters and yield of white clover (Trifolium repens L.) and ryegrass (Lolium perenne L.) mixtures. European Journal of Agronomy. Nov. 11(3-4): 167-177. {a} Unite associee, Agronomie et Environnement, INRA, ENSAIA, 2 Avenue de la Foret de Haye, F-54500, Vandoeuvre-les-Nancy, France

Singh, D. K., P. W. G. Sale, et al. (1999). High phosphorus supply increases persistence and growth of white clover in grazed dairy pastures during dry summer conditions. Australian Journal of Experimental Agriculture 39(5): 579-585. {a} CSIRO Plant Industry, Frank Wise Institute, Kununurra, WA, 6743, Australia

Stockdale, C. R. (1999). Effects of season and time since defoliation on the nutritive characteristics of three irrigated perennial pasture species in northern Victoria 2. Macro-minerals. Australian Journal of Experimental Agriculture 39(5): 567-577. {a} Department of Natural Resources and Environment, Institute of Sustainable Irrigated Agriculture, 120 Cooma Road, Kyabram Dairy Centre, Kyabram, VIC, 3620, Australia

Stockdale, C. R. (1999). Effects of season and time since defoliation on the nutritive characteristics of three irrigated perennial pasture species in northern Victoria 1. Energy, protein and fibre. Australian Journal of Experimental Agriculture 39(5): 555-565. {a} Department of Natural Resources and Environment, Institute of Sustainable Irrigated Agriculture, 120 Cooma Road, Kyabram Dairy Centre, Kyabram, VIC, 3620, Australia

Kiso, S. and M. Noshiro (1999). Management methods for early harvesting of timothy (Phleum pratense L.) dominant meadows. 3. The vertical distribution of leaf area and relative light intensity during the regrowth after 1st cut in early harvested timothy-white clover (Trifolium repens L.) mixtures. Grassland Science. July 45(2): 170-175. {a} Hokkaido Tenpoku Agricultural Experiment Station, Hamatonbetsu, Hokkaido, 098-5736, Japan

Ide, Y., H. Hayashi, et al. (1999). Effect of dissemination of seeds along with cattle dung on the propagation of Kentucky bluegrass (Poa pratensis L.). 2. Seasonal changes in the recovery and viability of seeds in cattle dung on the pasture and the invasion to the sloping Sasa-type pasture with the seeds embedded in cattle dung. Grassland Science. July 45(2): 163-169. {a} Chugoku National Agricultural Experiment Station, Kawai, Oda, Shimane, 694-0013, Japan

de, S. F. A. and B. R. L. Louro (1999). Ontogeny of Glomus clarum in Ri T-DNA transformed roots. Mycologia . March April 91(2): 343-350. {a} EMBRAPA Agrobiologia, km 47 Antiga Rodovia Rio-Sao Paulo, Seropedica, CEP 23851-970, Rio de Janeiro, Brazil

Griffith, G. S., R. Cook, et al. (1999). Effects of temperature on stem nematode (Ditylenchus dipsaci) infestation of white clover (Trifolium repens) swards. Nematology . July 1(4): 415-420. {a} Institute of Grassland and Environmental Research, Plas Gogerddan, Aberystwyth, SY23 3EB, UK

Barthram, G. T., G. R. Bolton, et al. (1999). The effects of cutting intensity and neighbour species on plants of Lolium perenne, Poa annua, Poa trivialis and Trifolium repens. Agronomie Paris. Aug. Sept. 19(6): 445-456. {a} Hartwood Research Station, Macaulay Land Use Research Institute, Shotts, ML7 4JY, UK

Haynes, R. J. (1999). Labile organic matter fractions and aggregate stability under short-term, grass-based leys. Soil Biology and Biochemistry. Nov. 31(13): 1821-1830. {a} Department of Agronomy, University of Natal, Scottsville, Pietermaritzburg, 3209, South Africa

Thom, E. R., D. A. Clark, et al. (1999). Growth, persistence, and alkaloid levels of endophyte-infected and endophyte-free ryegrass pastures grazed by dairy cows in northern New Zealand. New Zealand Journal of Agricultural Research. Sept. 42(3): 241-253. {a} Dairying Research Corporation, Hamilton, New Zealand

Campbell, B. D., N. D. Mitchell, et al. (1999). Climate profiles of temperate C3 and subtropical C4 species in New Zealand pastures. New Zealand Journal of Agricultural Research. Sept. 42(3): 223-233. {a} AgResearch Grasslands, Palmerston North, New Zealand

Annicchiarico, P., E. Piano, et al. (1999). Heritability of, and genetic correlations among, forage and seed yield traits in Ladino white clover. Plant Breeding. Sept. 118(4): 341-346. {a} Istituto Sperimentale per le Colture Foraggere, 29 viale Piacenza, I-26900, Lodi, Italy

Willoughby, I. (1999). Future alternatives to the use of herbicides in British forestry. Canadian Journal of Forest Research. July 29(7): 866-874. {a} Forest Research, Great Britain Forestry Commission, Alice Holt Lodge, Wrecclesham, Farnham, Surrey, GU10 4LH, UK

Reverter, M., T. Lundh, et al. (1999). Ileal amino acid digestibilities in pigs of barley-based diets with inclusion of lucerne (Medicago sativa), white clover (Trifolium repens), red clover (Trifolium pratense) or perennial ryegrass (Lolium perenne). British Journal of Nutrition. Aug. 82(2): 139-147. {a} Department of Animal Nutrition and Management, Swedish University of Agricultural Sciences, S-750 07, Uppsala, Sweden

Stewart, D. P. C. and A. K. Metherell (1999). Carbon (13C) uptake and allocation in pasture plants following field pulse-labelling. Plant and Soil 210(1): 61-73. {a} AgResearch, c/- Soil and Physical Sciences, Lincoln University, Canterbury, New Zealand

Shiel, R. S., T. A. M. A. El, et al. (1999). The influence of fertilizer nitrogen, white clover content and environmental factors on the nitrate content of perennial ryegrass and ryegrass/white clover swards. Grass and Forage Science. Sept. 54(3): 275-285. {a} Agriculture Department, University of Newcastle, Newcastle upon Tyne, NE1 7RU, UK

Watson, C. J. and P. Poland (1999). Change in the balance of ammonium-N and nitrate-N content in soil under grazed grass swards over 7 years. Grass and Forage Science. Sept. 54(3): 248-254. {a} Agricultural and Environmental Science Division, Department of Agriculture for Northern Ireland, Newforge Lane, Belfast, BT9 5PX, UK

Haigh, P. M. (1999). Effluent production from grass silages treated with additives and made in large-scale bunker silos. Grass and Forage Science. Sept. 54(3): 208-218. {a} Pwllpeiran Research Centre, ADAS, Cwmystwyth, Aberystwyth, Ceredigion, SY23 4AB, UK

Wilman, D. and N. Ahmad (1999). In vitro digestibility, neutral detergent fibre, lignin and cell wall thickness in plant parts of three forage species. Journal of Agricultural Science. Aug. 133(1): 103-108. {a} Welsh Institute of Rural Studies, University of Wales, Llanbadarn Campus, Aberystwyth, Ceredigion, SY23 3AL, UK

Nishiwaki, A., S. Sato, et al. (1999). The comparison of pasture vegetation between two dairy farms under diffrerent grazing management. Grassland Science. April 45(1): 52-58. {a} Faculty of Agriculture, Miyazaki University, Gakuen Kibanadai, Miyazaki, 889-2192, Japan

Lomas, L. W., J. L. Moyer, et al. (1999). Effect of interseeding legumes into endophyte-infected tall fescue pastures on forage production and steer performance. Journal of Production Agriculture. July Sept 12(3): 479-483. {a} Southeast Agric. Res. Cent., Kansas State Univ., Parsons, KS, 67357, USA

Mason, E. G. and B. Kirongo (1999). Responses of radiata pine clones to varying levels of pasture competition in a semiarid environment. Canadian Journal of Forest Research. July 29(7): 934-939. {a} School of Forestry, University of Canterbury, Christchurch, New Zealand

Blackstock, T. H. and R. H. Roberts (1998). Trifolium occidentale D. E. Coombe (Fabaceae) in Anglesey (V.C. 52). Watsonia . Aug. 22(2): 182-184. {a} Countryside Council for Wales, Penrhos Road, Bangor, Gwynedd, LL57 2HY, UK

Cresswell, A., N. R. S. Hamilton, et al. (1999). Evidence for root contraction in white clover (Trifolium repens L.). Annals of Botany London. Sept. 84(3): 359-369. {a} Institute of Grassland and Environmental Research, Plas Gogerddan, Aberystwyth, Ceredigion, SY23 3EB, UK

Lantinga, E. A., M. Nassiri, et al. (1999). Modelling and measuring vertical light absorption within grass-clover mixtures. Agricultural and Forest Meteorology. Aug. 96(1-3): 71-83. {a} C.T. De Wit Graduate School for Production Ecology (PE), Laboratory of Theoretical Production Ecology, Wageningen Agricultural University, 6700 AK, Wageningen, Netherlands

Grafton, C. E. E., Y. Ouyang, et al. (1999). Leguminous cover crops to enhance population development of Euseius tularensis (Acari: Phytoseiidae) in Citrus. Biological Control. Sept. 16(1): 73-80. {a} Kearney Agricultural Center, 9240 South Riverbend Avenue, Parlier, CA, 93648, USA

Habte, M., Y. C. Zhang, et al. (1999). Effectiveness of Glomus species in protecting white clover against nematode damage. Canadian Journal of Botany. Jan. 77(1): 135-139. {a} Department of Agronomy and Soil Science, University of Hawaii, 1910 East-West Road, Honolulu, HI, 96822, USA

Kerley, S. J. and S. C. Jarvis (1999). The use of nitrogen-15 natural abundance in white clover (Trifolium repens L.) to determine nitrogen fixation under different management practices. Biology and Fertility of Soils. Aug. 29(4): 437-440. {a} IACR Rothamsted, Harpenden Herts, AL5 2JQ, UK

McKenzie, F. R., M. J. Ryan, et al. (1999). Effect of rate and time of nitrogen application from autumn to midwinter on perennial ryegrass-white clover dairy pastures in western Victoria. 1. Growth and composition. Australian Journal of Agricultural Research 50(6): 1059-1065. {a} Department of Natural Resources and Environment, 78 Henna Street, Warrnambool, Vic., 3280, Australia

Chaudhary, L. B. (1998). LM and SEM studies on seeds of Trifolium L. (Leguminosae - Papilionoideae). Journal of Economic and Taxonomic Botany. March 22(3): 723-728. {a} Biodiversity and Taxonomy Division, National Botanical Research Institute, Rana Pratap Marg, Lucknow, 226 001, India

Alley, J. L., H. E. Garrett, et al. (1998). Forage legumes as living mulches for trees in agroforestry practices - Preliminary results. Agroforestry Systems 44(2-3): 281-291. {a} School of Natural Resources, University of Missouri, Columbia, MO, 65211, USA

Navas, M. L., E. Garnier, et al. (1999). Effect of competition on the responses of grasses and legumes to elevated atmospheric CO2 along a nitrogen gradient: Differences between isolated plants, monocultures and multi-species mixtures. New Phytologist. Aug. 143(2): 323-331. {a} U.F.R. de Biologie et Pathologie Vegetales, ENSA-M, Place Viala, 34060, Montpellier Cedex 2, France

Shah, P., Z. Ahmed, et al. (1999). Wild clover (Trifolium repens) an alternative substrate for spawn. Journal of Mycology and Plant Pathology. April 29(1): 124-125. {a} Defence Agricultural Research Laboratory, Pithoragarh, Uttar Pradesh, 262501, India

Auldist, D. E., K. L. Atkinson, et al. (1999). Utilisation of white clover silage fed alone or with maize silage by lactating dairy cows. Australian Journal of Experimental Agriculture 39(3): 237-246. {a} La Trobe University, Bundoora, Vic., 3083, Australia

McKenzie, F. R., J. L. Jacobs, et al. (1999). Effect of rate and time of nitrogen application from autumn to midwinter on perennial ryegrass-white clover dairy pastures in western Victoria. 2. Pasture nutritive value. Australian Journal of Agricultural Research 50(6): 1067-1072. {a} Department of Natural Resources and Environment, 78 Henna Street, Warrnambool, Vic., 3280, Australia

Frankow, L. B. E. (1999). Effects of adaptation to winter stress on biomass production, growth and morphology of three contrasting white clover cultivars. Physiologia Plantarum. June 106(2): 196-202. {a} Department of Ecology and Crop Production Science, SLU, S-750 07, Uppsala, Sweden

Jorgensen, F. V., E. S. Jensen, et al. (1999). Dinitrogen fixation in white clover grown in pure stand and mixture with ryegrass estimated by the immobilized 15N isotope dilution method. Plant and Soil. July 208(2): 293-305. {a} Department of Economics and Natural Resources, The Royal Veterinary and Agricultural University, Kirkegardsvej 3A, DK-2970, Horsholm, Denmark

Sammour, R. H. (1999). SDS-PAGE analysis of the seed proteins of some Trifolium taxa. Plant Varieties and Seeds. April 12(1): 11-21. {a} Department of Botany, Faculty of Science, Tanta University, Tanta, Egypt

Barone, M. and T. Frank (1999). Effects of plant extracts on the feeding behaviour of the slug Arion lusitanicus. Annals of Applied Biology. June 134(3): 341-345. {a} Zoological Institute, University of Bern, Baltzerstrasse 3, 3012, Bern, Switzerland

Fengrui, L. (1999). Severity of damage to Trifolium repens leaves by certain invertebrate species in mixed perennial ryegrass/white clover swards: Response to cultivar, cutting frequency and sward characteristics. Grass and Forage Science. June 54(2): 137-143. {a} Yale School of Forestry and Environmental Studies, Yale University, 205 Prospect Street, New Haven, CT, 06511, USA

Yeates, G. W., S. Saggar, et al. (1999). Increase in 14C-carbon translocation to the soil microbial biomass when five species of plant-parasitic nematodes infect roots of white clover. Nematology . June 1(3): 295-300. {a} Landcare Research, Palmerston North, New Zealand

Charmley, E., P. Savoie, et al. (1999). Effect of maceration at mowing on silage conservation, voluntary intake, digestibility and growth rate of steers fed precision chopped or round bale silages. Canadian Journal of Animal Science. June 79(2): 195-202. {a} Crops and Livestock Research Centre, Agriculture and Agri-Food Canada, Nappan, NS, B0L 1C0, Canada

Gunn, S., S. J. Bailey, et al. (1999). Partitioning of dry mass and leaf area within plants of three species grown at elevated CO2. Functional Ecology. June 13(Suppl. 1): 3-11. {a} School of Biological Sciences, University of Wales Bangor, Bangor, Gwynedd, LL57 2UW, UK

Davey, P. A., A. J. Parsons, et al. (1999). Does photosynthetic acclimation to elevated CO2 increase photosynthetic nitrogen-use efficiency? A study of three native UK grassland species in open-top chambers. Functional Ecology. June 13(Suppl. 1): 21-28. {a} Departments of Crop Sciences and Plant Biology, 190 Edward R. Madigan Laboratory, University of Illinois, 1201 West Gregory Drive, Urbana, IL, 61801, USA

Leeflang, L. (1999). Are stoloniferous plants able to avoid neighbours in response to low R: FR ratios in reflected light? Plant Ecology. April 141(1-2): 59-65. {a} Department of Plant Ecology and Evolutionary Biology, 3508 TB, Utrecht, Netherlands

Kumar, S. and R. S. Bhatt (1999). Feeding of white clover (Trifolium repens) hay in Angora rabbits. Indian Journal of Animal Nutrition. June 16(2): 167-170. {a} Regional Research Station, HPKV, Bajaura, Kullu, 175 125, India

Hoskin, S. O., T. N. Barry, et al. (1999). Effects of reducing anthelmintic input upon growth and faecal egg and larval counts in young farmed deer grazing chicory (Cichorium intybus) and perennial ryegrass (Lolium perenne)/white clover (Trifolium repens) pasture. Journal of Agricultural Science. May 132(3): 335-345. {a} Institute for Food, Nutrition and Human Health, Massey University, Palmerston North, New Zealand

Min, B. R., W. C. McNabb, et al. (1999). The effect of condensed tannins in Lotus corniculatus upon reproductive efficiency and wool production in sheep during late summer and autumn. Journal of Agricultural Science. May 132(3): 323-334. {a} Institute for Food, Nutrition and Human Health, Massey University, Palmerston North, New Zealand

Joyce, T. A., M. T. Abberton, et al. (1999). Relationships between genetic distance measured by RAPD-PCR and heterosis in inbred lines of white clover (Trifolium repens L.). Euphytica 107(3): 159-165. {a} Legume Breeding Group, Institute of Grassland and Environmental Research, Plas Gogerddan, Aberystwyth, Ceredigion, SY23 3EB, UK

Karsten, H. D. and G. W. Fick (1999). White clover growth patterns during the grazing season in a rotationally grazed dairy pasture in New York. Grass and Forage Science. June 54(2): 174-183. {a} Department of Agronomy, Pennsylvania State University, 116 ASI Building, University Park, PA, 16802, USA

Bungener, P., G. R. Balls, et al. (1999). Leaf injury characteristics of grassland species exposed to ozone in relation to soil moisture condition and vapour pressure deficit. New Phytologist. May 142(2): 271-282. {a} Swiss Federal Research Station for Agroecology and Agriculture (FAL), Institute of Environmental Protection and Agriculture (IUL) Liebefeld, CH-3003, Bern, Switzerland

Hutangura, P., U. Mathesius, et al. (1999). Auxin induction is a trigger for root gall formation caused by root-knot nematodes in white clover and is associated with the activation of the flavonoid pathway. Australian Journal of Plant Physiology 26(3): 221-231. {a} Plant Microbe Interactions Group, Research School of Biological Sciences, Australian National University, Canberra, ACT, 2601, Australia

Murray, P. J. and B. Willoughby (1998). Feeding preferences of Sitonia lepidus (clover root weevil) on Trifolium spp. In New Zealand. Tests of Agrochemicals and Cultivars(19): 58-59. {a} Institute of Grassland and Environmental Research, North Wyke, Okehampton, Devon, EX20 2SB, UK

Lewis, G. C. and B. Vaughan (1998). Comparison of pest damage to seedlings of two white clover cultivars at four sites. Tests of Agrochemicals and Cultivars(19): 42-43. {a} North Wyke Research Station, Institute of Grassland and Environmental Research, Okehampton, Devon, EX20 2SB, UK

Bungener, P., S. Nussbaum, et al. (1999). Growth response of grassland species to ozone in relation to soil moisture condition and plant strategy. New Phytologist. May 142(2): 283-293. {a} Swiss Federal Research Station for Agroecology and Agriculture (FAL), Institute of Environmental Protection and Agriculture (IUL) Liebefeld, CH-3003, Bern, Switzerland

Marilley, L., U. A. Hartwig, et al. (1999). Influence of an elevated atmospheric CO2 content on soil and rhizosphere bacterial communities beneath Lolium perenne and Trifolium repens under field conditions. Microbial Ecology. July 38(1): 39-49. {a} GSF-National Research Center, Institute of Soil Ecology, Ingolstaedter Landstrasse 1, D-85758, Oberschleissheim, Germany

Gangbazo, G., G. M. Barnett, et al. (1999). Disposing hog manure on inorganically-fertilized corn and forage fields in southeastern Quebec. Canadian Agricultural Engineering. Jan. March 41(1): 1-12. {a} Direction des ecosystemes aquatiques, Ministere de l'Environnement et de la Faune, Edifice Marie Guyart, 7e etage, 675, Rene-Levesque Est, B-22, Quebec, PQ, G1R 5V7, Canada

Abberton, M. T., J. H. MacDuff, et al. (1999). Nitrogen fixation by hybrids of white clover (Trifolium repens L.) and Trifolium nigrescens. Journal of Agronomy and Crop Science. July 183(1): 27-33. {a} Institute of Grassland and Environmental Research, Plas Gogerddan, Ceredigion, Aberystwyth, SY23 3EB, UK

Carlier, L. and M. Machiels (1998). Forage legumes: Possibilities for improvement of production. Proceedings of the Latvian Academy of Sciences Section B Natural Exact and Applied Sciences 52(6): 300-304. {a} Department Crop Husbandry and Ecophysiology (CLO-Gent), Plant Breeding Institute, Burgemeester van Gansberghelaan 109, B-9820, Merelbeke, Belgium

Tesfaye, M. and F. B. Holl (1998). Rhizobium strains that nodulate Trifolium semipilosum Fres. are phylogenetically distinct. Plant and Soil 207(2): 147-154. {a} Faculty of Agricultural Sciences, The University of British Columbia, Vancouver, B.C., V6T 1Z4, Canada

Scheu, S., A. Theenhaus, et al. (1999). Links between the detritivore and the herbivore system: Effects of earthworms and Collembola on plant growth and aphid development. Oecologia Berlin. June 119(4): 541-551. {a} Institute of Zoology, Darmstadt University of Technology, Schnittspahnstrasse 3, D-64287, Darmstadt, Germany

Sawada, H. (1999). Genetic variation in clonal traits of Trifolium repens and species interactions. Plant Species Biology. April 14(1): 19-28. {a} Faculty of Agriculture, Shizuoka University, Ooya 836, Shizuoka, 422-8529, Japan

Edwards, G. R. and M. J. Crawley (1999). Effects of disturbance and rabbit grazing on seedling recruitment of six mesic grassland species. Seed Science Research. June 9(2): 145-156. {a} AgResearch Grasslands, Tennent Drive, Palmerston North, New Zealand

Stocklin, J. and C. Korner (1999). Interactive effects of elevated CO2, P availability and legume presence on calcareous grassland: Results of a glasshouse experiment. Functional Ecology. April 13(2): 200-209. {a} Institute of Botany, University of Basel, Schonbeinstr. 6, CH-4056, Basel, Switzerland

Staddon, P. L., J. D. Graves, et al. (1999). Effect of enhanced atmospheric CO2 on mycorrhizal colonization and phosphorus inflow in 10 herbaceous species of contrasting growth strategies. Functional Ecology. April 13(2): 190-199. {a} Department of Biology, University of York, York, YO1 5YW, UK

Daners, G. and M. C. Telleria (1998). Native vs. introduced bee flora: A palynological survey of honeys from Uruguay. Journal of Apicultural Research 37(4): 221-229. {a} Palynology Department, Faculty of Sciences, Igua 4225, 11400, Montevideo, Uruguay

Schittko, U., F. Burghardt, et al. (1999). Sequestration and distribution of flavonoids in the common blue butterfly Polyommatus icarus reared on Trifolium repens. Phytochemistry Oxford. July 51(5): 609-614. {a} Pharmazeutische Biologie, Julius-von-Sachs-Institut fuer Biowissenschaften, Julius-von-Sachs-Platz 2, 97082, Wuerzburg, Germany

Saucy, F., J. Studer, et al. (1999). Preference for acyanogenic white clover (Trifolium repens) in the vole Arvicola terrestris: I. Experiments with two varieties. Journal of Chemical Ecology. June 25(6): 1441-1454. {a} Department of Biology, Ecology and Biology of Organisms, University of Fribourg, Perolles, CH-1700, Fribourg, Switzerland

McKenzie, F. R., J. L. Jacobs, et al. (1998). Influence of single applications of nitrogen on white clover nitrogen fixation in autumn and winter dairy pastures in south-west Victoria, Australia. African Journal of Range and Forage Science. Aug. 15(1-2): 1-6. {a} Department of Natural Resources and Environment, 78 Henna Street, Warrnambool, VIC, 3280, Australia

Boehme, F., P. K. Welsch, et al. (1999). Uptake of airborne semivolatile organic compounds in agricultural plants: Field measurements of interspecies variability. Environmental Science and Technology. June 33(11): 1805-1813. {a} Baltic Sea Research Institute, Seestrasse 15, 18119, Rostock, Germany

Eason, W. R., J. Scullion, et al. (1999). Soil parameters and plant responses associated with arbuscular mycorrhizas from contrasting grassland management regimes. Agriculture Ecosystems and Environment. May 73(3): 245-255. {a} Institute for Grassland and Environmental Research, Plas Goggerdan, Aberystwyth, SY23 3EB, UK

Davidson, M. M., T. Cilgi, et al. (1997). Resilience of springtail (Collembola) populations in farmland following exposure to insecticides. Australasian Journal of Ecotoxicology. July 3(2): 99-108. {a} Division of Soil, Plant and Ecological Sciences, Lincoln University, Canterbury, New Zealand

Hunter, D. A., S. D. Yoo, et al. (1999). Expression of 1-aminocyclopropane-1-carboxylate oxidase during leaf ontogeny in white clover. Plant Physiology Rockville. May 120(1): 131-141. {a} Institute of Molecular BioSciences, Massey University, Palmerston North, New Zealand

Wales, W. J., P. T. Doyle, et al. (1999). Effects of variations in herbage mass, allowance, and level of supplement on nutrient intake and milk production of dairy cows in spring and summer. Australian Journal of Experimental Agriculture 39(2): 119-130. {a} Department of Natural Resources and Environment, Kyabram Dairy Centre, Institute of Sustainable Irrigated Agriculture, 120 Cooma Road, Kyabram, Vic., 3620, Australia

Todorovic, C., C. Nguyen, et al. (1999). 14C-assimilate partitioning within white clover plant-soil system: Effects of photoperiod/temperature treatments and defoliation. European Journal of Agronomy. June 11(1): 13-21. {a} Unite associee INRA Agronomie et Environment, ENSAIA, Vandoeuvre-les-Nancy, F-54505, France

Kunelius, H. T. and K. B. McRae (1999). Forage chicory persists in combination with cool season grasses and legumes. Canadian Journal of Plant Science. April 79(2): 197-200. {a} Crop and Livestock Research Centre, Agriculture and Agri-Food Canada, Charlottetown, PE, C1A 7M8, Canada

Marshall, A. H., A. A. Cowan, et al. (1999). A comparison of ovule abortion in self-incompatible and self-fertile lines of white clover (Trifolium repens L.). Annals of Applied Biology. Feb. 134(1): 121-124. {a} Institute of Grassland and Environmental Research, Plas Gogerddan, Aberystwyth, Ceredigion, SY23 3EB, UK

Sutherland, B. L., D. E. Hume, et al. (1999). Allelopathic effects of endophyte-infected perennial ryegrass extracts on white clover seedlings. New Zealand Journal of Agricultural Research. March 42(1): 19-26. {a} Grasslands Research Centre, AgResearch, Palmerston North, New Zealand

Manderscheid, R., J. Bender, et al. (1999). Long term effects of various atmospheric carbon dioxide concentrations on physiology, growth, yield, and quality of crop plants. Berichte ueber Landwirtschaft. March 77(1): 117-120. {a} Braunschweig, Germany

Ogura, S. i., K. Abe, et al. (1999). The effect of foaming in the rumen with white clover ingestion on the microbial fermentation of sheep. Grassland Science. Jan. 44(4): 310-314. {a} Grassland and Animal Production Division, Faculty of Agriculture, Miyazaki University, Miyazaki, 889-2192, Japan

Hoskin, S. O., T. N. Barry, et al. (1999). Growth and carcass production of young farmed deer grazing sulla (Hedysarum coronarium), chicory (Cichorium intybus), or perennial ryegrass (Lolium perenne)/white clover (Trifolium repens) pasture in New Zealand. New Zealand Journal of Agricultural Research. March 42(1): 83-92. {a} Institute of Food Nutrition and Human Health, Massey University, Palmerston North, New Zealand

Lewis, D. N., A. H. Marshall, et al. (1998). Influence of storage conditions on seed germination and vigour of temperate forage species. Seed Science and Technology 26(3): 643-656. {a} Institute of Grassland and Environmental Research, Plas Gogerddan, Aberystwyth, Ceredigion, SY23 3EB, UK

Wachendorf, M., B. Ingwersen, et al. (1999). Prediction of the clover content of red clover- and white clover-grass mixtures by near-infrared reflectance spectroscopy. Grass and Forage Science. March 54(1): 87-90. {a} Department of Grass and Forage Science, Institute of Crop Science and Plant Breeding, Christian-Albrechts-University Kiel, Holzkoppelweg 2, 24118, Kiel, Germany

Bailey, J. S. and A. S. Laidlaw (1999). The interactive effects of phosphorus, potassium, lime and molybdenum on the growth and morphology of white clover (Trifolium repens L.) at establishment. Grass and Forage Science. March 54(1): 69-76. {a} Department of Agriculture for Northern Ireland, Agricultural and Environmental Science Division, Newforge Lane, Belfast, BT9 5PX, UK

Bowman, A. M., G. P. M. Wilson, et al. (1998). Evaluation of perennial peanuts (Arachis spp.) as forage on the New South Wales north coast. Tropical Grasslands. Dec. 32(4): 252-258. {a} NSW Agriculture, Trangie, NSW, 2823, Australia

Campbell, B. D., J. R. Caradus, et al. (1999). Temperature responses and nuclear DNA amounts of seven white clover populations which differ in early spring growth rates. New Zealand Journal of Agricultural Research. March 42(1): 9-17. {a} Grasslands Research Centre, AgResearch, Palmerston North, New Zealand

Hunter, D. A. and M. T. McManus (1999). Comparison of acid phosphatases in two genotypes of white clover with different responses to applied phosphate. Journal of Plant Nutrition. April May 22(4-5): 679-692. {a} Institute of Molecular Biosciences, Massey University, Palmerston North, New Zealand

Mika, A., D. Krzewinska, et al. (1998). Effects of mulches, herbicides and cultivation as orchard groundcover management systems in young apple orchard. Journal of Fruit and Ornamental Plant Research 6(1): 1-13. {a} Research Institute of Pomology and Floriculture, Skierniewice, Poland

Nassiri, M. and A. Elgersma (1998). Competition in perennial ryegrass-white clover mixtures under cutting. 2. Leaf characteristics, light interception and dry-matter production during regrowth. Grass and Forage Science. Dec. 53(4): 367-379. {a} Department of Agronomy, Graduate School of Production Ecology, Wageningen Agricultural University, Haarweg 333, 6709 RZ, Wageningen, Netherlands

Elgersma, A., M. Nassiri, et al. (1998). Competition in perennial ryegrass-white clover mixtures under cutting. 1. Dry-matter yield, species composition and nitrogen fixation. Grass and Forage Science. Dec. 53(4): 353-366. {a} Department of Agronomy, Graduate School of Production Ecology, Wageningen Agricultural University, Haarweg 333, 6709 RZ, Wageningen, Netherlands

Hoglind, M. and L. B. Frankow (1998). Growing point dynamics and spring growth of white clover in a mixed sward and the effects of nitrogen application. Grass and Forage Science. Dec. 53(4): 338-345. {a} Norwegian Crop Research Institute, Saerheim Research Centre, N-4062, Klepp, Norway

Ryan, M. and J. Ash (1999). Effects of phosphorus and nitrogen on growth of pasture plants and VAM fungi in SE Australian soils with contrasting fertiliser histories (conventional and biodynamic). Agriculture Ecosystems and Environment 73(1): 51-62. {a} CSIRO Plant Industry, Canberra, ACT, 2601, Australia

Zauralov, O. A. (1998). Sugars of nectar of some honey-containing plants cultivated in botanical garden of Mordovian university. Rastitel'nye Resursy 34(4): 72-75.

Ogren, E., B. Bath, et al. (1998). First and second year nitrogen effects of autumn and spring-incorporated green-manure crops in field vegetable production. Swedish Journal of Agricultural Research 28(3): 137-146. {a} Provincial Administration of Vastmanland, Vastmanland, Sweden

Silva, R. G., K. C. Cameron, et al. (1999). A lysimeter study of the impact of cow urine, dairy shed effluent, and nitrogen fertiliser on nitrate leaching. Australian Journal of Soil Research 37(2): 357-369. {a} Soil and Physical Sciences Group, Soil, Plant and Ecological Sciences Division, Lincoln University, Canterbury, New Zealand

Gustine, D. L. and D. R. Huff (1999). Genetic variation within and among white clover populations from managed permanent pastures of the Northeastern USA. Crop Science 39(2): 524-530. {a} Pasture Systems and Watershed Management Research Laboratory, USDA-ARS, Curtin Road, University Park, PA, 16802-3702, USA

Marriott, C. A., G. T. Barthram, et al. (1999). Seasonal dynamics of leaf extension and losses to senescence and herbivory in extensively managed sown ryegrass-white clover swards. Journal of Agricultural Science 132(1): 77-89. {a} Macaulay Land Use Research Institute, Craigiebuckler, Aberdeen, AB15 8QH, UK

Devesa, J. A., T. Ruiz, et al. (1998). Seed germination in wild clovers (Trifolium, Leguminosae) from Southwestern Europe (Spain). Plant Biosystems 132(3): 225-232. {a} Departamento de Biologia y Produccion de los Vegetales, Unidad de Botanica, Faculdad de Ciencias, Univesidad de Extremadura, 06071, Badajoz, Spain

Ansari, H. A., N. W. Ellison, et al. (1999). Molecular cytogenetic organization of 5S and 18S-26S rDNA loci in white clover (Trifolium repens L.) and related species. Annals of Botany London 83(3): 199-206. {a} AgResearch, Grasslands Research Centre, Palmerston North, New Zealand

Wilman, D., S. A. Byrne, et al. (1999). Persistence of sown species and ingress of unsown species in agriculturally improved hill swards. Journal of Agricultural Science 132(2): 155-161. {a} Welsh Institute of Rural Studies, University of Wales, Aberystwyth, Ceredigion, SY23 3AL, UK

Hunter, D. A., L. M. Watson, et al. (1999). Cell wall proteins in white clover: Influence of plant phosphate status. Plant Physiology and Biochemistry Paris 37(1): 25-32. {a} Institute of Molecular BioSciences, Massey University, Palmerston North, New Zealand

Scullion, J., W. R. Eason, et al. (1998). The effectivity of arbuscular mycorrhizal fungi from high input conventional and organic grassland and grass-arable rotations. Plant and Soil 204(2): 243-254. {a} Institute of Biological Sciences, University of Wales, Aberystwyth, SY23 3DE, UK

Aerts, R. J., W. C. McNabb, et al. (1999). Condensed tannins from Lotus corniculatus and Lotus pedunculatus exert differnt effects on the in vitro rumen degradation of ribulose-1,5-bisphosphate carboxylase/oxygenase (Rubisco) protein. Journal of the Science of Food and Agriculture 79(1): 79-85. {a} Nutr. Group, AgRes., Grasslands Res. Cent., Private Bag 11008, Palmerston North, New Zealand

Leadley, P. W., P. A. Niklaus, et al. (1999). A field study of the effects of elevated CO2 on plant biomass and community structure in a calcareous grassland. Oecologia Berlin 118(1): 39-49. {a} Univ. Paris-Sud XI, Batiment 362, Ecol. Population Communautes, F-91405 Orsay Cedex, France

Delavault, P., E. Estabrook, et al. (1998). Host-root exudates increase gene expression of asparagine synthetase in the roots of a hemiparasitic plant Triphysaria versicolor (Scrophulariaceae). Gene Amsterdam 222(2): 155-162. {a} Dep. Vegetable Crops, Univ. California-Davis, Davis, CA 95616-9659, USA

Scholefield, D., R. D. Sheldrick, et al. (1999). A comparison of triple superphosphate and Gafsa ground rock phosphate fertilisers as P-sources for grass-clover swards on a poorly-drained acid clay soil. Nutrient Cycling in Agroecosystems 53(2): 147-155. Institute Grassland, Environmental Research, North Wyke Research Station, Okehampton, Devon, EX20 2SB, UK

Riffkin, P. A., P. E. Quigley, et al. (1999). Annual nitrogen fixation in grazed dairy pastures in south-western Victoria. Australian Journal of Agricultural Research 50(2): 273-281. {a} Pastoral Vet. Inst., Private Bag 105, Hamilton, VIC 3300, Australia

Riffkin, P. A., P. E. Quigley, et al. (1999). Factors associated with biological nitrogen fixation in dairy pastures in south-western Victoria. Australian Journal of Agricultural Research 50(2): 261-272. {a} Pastoral Vet. Inst., Private Bag 105, Hamilton, VIC 3300, Australia

Brandsaeter, L. O., J. Netland, et al. (1998). Yields, weeds, pests and soil nitrogen in a white cabbage-living mulch system. Biological Agriculture and Horticulture 16(3): 291-309. {a} Department Herbology, Plant Protect Centre, Norwegian Crop Research Institute, N-1432 As, Norway

Clark, H., P. C. D. Newton, et al. (1999). Physiological and morphological responses to elevated CO2 and a soil moisture deficit of temperate pasture species growing in an established plant community. Journal of Experimental Botany 50(331): 233-242. {a} AgRes. Grasslands, Private Bag 11008, Palmerston North, New Zealand

Laidlaw, A. S. and J. A. Withers (1998). Changes in contribution of white clover to canopy structure in perennial ryegrass/white clover swards in response to N fertilizer. Grass and Forage Science 53(3): 287-291. {a} Applied Plant Science Division, Department of Agriculture for Northern Ireland, Plant Testing Station, 50 Houston Road, Crossnacreevy, Belfast, BT6 9SH, UK

Ayres, J. F., K. S. Nandra, et al. (1998). A study of the nutritive value of white clover (Trifolium repens L.) in relation to different stages of phenological maturity in the primary growth phase in spring. Grass and Forage Science 53(3): 250-259. {a} Agricultural Research and Advisory Station, NSW Agriculture, Glen Innes, New South Wales, 2370, Australia

Singh, D. K. and P. W. G. Sale (1998). Phosphorus supply and the growth of frequently defoliated white clover (Trifolium repens L.) in dry soil. Plant and Soil 205(2): 155-162. Dep. Agric. Sci., La Trobe Univ., Bundoora, VIC 3083, Australia

Liu, X., K. Takayama, et al. (1998). Cultivation condition and nutritive value of Azolla as a feed resource. Grassland Science 44(3): 266-271. Fac. Agric., Kagoshima Univ., 1-21-24 Korimoto, Kagoshima, Kagoshima 890-0065, Japan

Ye, Z. H., J. W. C. Wong, et al. (1999). Lime and pig manure as ameliorants or revegetating lead/zinc mine tailings: A greenhouse study. Bioresource Technology 69(1): 35-43. {a} Inst. Natural Resources Waste Management, Hong Kong Baptist Univ., Kowloon Tong, Hong Kong

Tang, Y., B. I. Chevone, et al. (1999). Ozone-responsive proteins in a tolerant and sensitive clone of white clover (Trifolium repens). Environmental Pollution 104(1): 89-98. {a} Dep. Plant Pathol., Physiol. Weed Sci., Virginia Polytechnic Inst. State Univ., Blacksburg, VA 24050, USA

Voigt, P. W., H. W. Godwin, et al. (1998). Effect of four acid soils on root growth of white clover seedlings using a soil-on-agar procedure. Plant and Soil 205(1): 51-56. USDA-ARS, Appalachian Soil Water Conservation Res. Lab., 1224 Airport Road, Beaver, WV 25813-9423, USA

Dunsford, S. J., A. J. Free, et al. (1998). Acidifying peat as an aid to the reconstruction of lowland heath on arable soil: A field experiment. Journal of Applied Ecology 35(5): 660-672. {a} Sch. Biological Sci., Univ. East Anglia, Norwich NR4 7TJ, UK

Davy, A. J., S. J. Dunsford, et al. (1998). Acidifying peat as an aid to the reconstruction of lowland health on arable soil: Lysimeter experiments. Journal of Applied Ecology 35(5): 649-659. {a} Sch. Biological Sci., Univ. East Anglia, Norwich NR4 7TJ, UK

Zygoyiannis, D., N. Katsaounis, et al. (1999). The use of nutritional management after weaning for the production of heavier lamb carcasses from Greek dairy breeds. Livestock Production Science 57(3): 279-289. {a} Animal Biol. Div., Scott. Agric. College, Bush Estate, Penicuik EH26 0QE, UK

Thompson, D. B. (1999). Genotype-environment interaction and the ontogeny of diet-induced phenotypic plasticity in size and shape of Melanoplus femurrubrum (Orthoptera: Acrididae). Journal of Evolutionary Biology 12(1): 38-48. {a} Dep. Biol. Sci., Univ. Nevada, Las Vegas, 4504 Maryland Parkway, Las Vegas, NV 89154-4004, USA

Di, H. J., K. C. Cameron, et al. (1998). Nitrate leaching and pasture yields following the application of dairy shed effluent or ammonium fertilizer under spray or flood irrigation: Results of a lysimeter study. Soil Use and Management 14(4): 209-214. Soil Phys. Sci. Group, Soil Plant Ecol. Sci. Div., PO Box 84, Lincoln Univ., Canterbury, New Zealand

Sircelj, H., F. Batic, et al. (1997). Effects of ozone on pigment and ascorbic acid content in white clover (Trifolium repens L. cv. "Menna") leaves. Acta Biologica Slovenica 41(4): 43-50. {a} Agron. Dep., Biotech. Fac., Univ. Ljubljana, Jamnikarjeva 101, 1111 Ljubljana, Slovenia

Milne, W. M. (1998). Comparative performance of two biotypes of Therioaphis trifolii (Monell) (Hemiptera: Aphididae) on clovers (Trifolium) and medics (Medicago). Australian Journal of Entomology 37(4): 350-355. {a} CSIRO Entomology, GPO Box 1700, Canberra, ACT 2601, Australia

Cho, N. K., Y. K. Kang, et al. (1998). Distribution, standing crop, and nutritive value of native legumes in Cheju Island. Korean Journal of Animal Science 40(6): 681-690. {a} Dep. Agron., Cheju Natl. Univ., Cheju 690-756, South Korea

Murray, P. J. and R. O. Clements (1998). Transfer of nitrogen between clover and wheat: Effect of root herbivory. European Journal of Soil Biology 34(1): 25-30. {a} Inst. Grassl. Environ. Res., North Wyke Res. Stn., Okehampton, Devon EX20 2SB, UK

Calvitti, M. and P. C. Remotti (1998). Host preference and performance of Bemisia argentifolii (Homoptera: Aleyrodidae) on weeds in central Italy. Environmental Entomology 27(6): 1350-1356. Innovation Dep., Div. Agric., ENEA-CRE Casaccia, Via Anguillarese 301, 00060 S. M. di Galeria, Rome, Italy

Teklehaimanot, Z. and R. Martin (1999). Diurnal and seasonal patterns of nitrogenase activity of red alder in comparison with white clover in silvopastoral agroforestry systems. Biology and Fertility of Soils 28(3): 267-270. {a} Sch. Agric. Forest Sci., Univ. Wales Bangor, Gwynedd LL57 2UW, UK

Lewis, G. C. and B. Vaughan (1998). Comparison of pest damage to seedlings of two white clover cultivars at four sites. Annals of Applied Biology 132(Suppl.): 42-43. Inst. Grassland Environ. Res., North Wyke Res. Stn., Okehampton, Devon EX20 2SB, UK

Niezen, J. H., H. A. Robertson, et al. (1998). Production, faecal egg counts and worm burdens of ewe lambs which grazed six contrasting forages. Veterinary Parasitology 80(1): 15-27. {a} AgRes., Grassland, Private Bag 11008, Palmerston North, New Zealand

Lotocka, B., J. Kopcinska, et al. (1998). Morphogenesis of root nodules in white clover. II. The effect of mutation in genes nod IJ of the microsymbiont upon the nodule structure. Acta Societatis Botanicorum Poloniae 67(1): 5-22. Dep. Bot., Fac. Agric., Warsaw Agric. Univ., Rakowiecka 26/30, 02-528 Warsaw, Poland

Lotocka, B. and W. Golinowski (1998). Morphogenesis of root nodules in white clover. III. The effect of mutation in nod IJ genes of the microsymbiont upon the DNA level in the host tissue. Acta Societatis Botanicorum Poloniae 67(1): 23-29. Dep. Bot., Fac. Agric., Warsaw Agric. Univ., Rakowiecka 26/30, 02-528 Warszawa, Poland

Hornick, J. L., P. Raskin, et al. (1998). Compensatory growth in Belgian Blue bulls previously grazed at two stocking rates: Animal performance and meat characteristics. Animal Science Pencaitland 67(3): 427-434. {a} Dep. Anim. Nutr., B43, Fac. Vet. Med., Univ. Liege, Sart-Tilman, 400 Leige, Belgium

Thom, E. R., C. D. Waugh, et al. (1998). Growth and persistence of perennial and hybrid ryegrasses when grazed by dairy cows in the central Waikato region of New Zealand. New Zealand Journal of Agricultural Research 41(4): 477-486. Dairying Res. Corp., Private Bag 3123, Hamilton, New Zealand

Denton, C. S., R. D. Bardgett, et al. (1999). Low amounts of root herbivory positively influence the rhizosphere microbial community in a temperate grassland soil. Soil Biology and Biochemistry 31(1): 155-165. {a} Sch. Biol. Sci., 3.614 Stopford Building, Univ. Manchester, Manchester M13 9PT, UK

Chevone, B., W. Manning, et al. (1998). Relating ambient ozone concentrations to adverse biomass responses of white clover: A case study. Environmental Pollution 103(1): 103-108. {a} Dep. Plant Pathol. Physiol. Weed Sci., Virginia Polytechnic Inst. State Univ., Blacksburg, VA 24061-0331, USA

Ball, G. R., J. Benton, et al. (1998). Identifying factors which modify the effects of ambient ozone on white clover (Trifolium repens) in Europe. Environmental Pollution 103(1): 7-16. {a} Dep. Computing, Nottingham Trent Univ., Burton St., Nottingham NG1 4BU, UK

Lotocka, B., J. Kopcinska, et al. (1997). Morphogenesis of root nodules in white clover. I. Effective root nodules induced by the wild type Rhizobium leguminosarum biovar. trifolii. Acta Societatis Botanicorum Poloniae 66(3-4): 273-292. {a} Dep. Botany, Fac. Agric., Warsaw Agric. Univ., Rakowiecka 26/30, 02-528 Warsaw, Poland

Abberton, M. T., Y. T. P. T. Michaelson, et al. (1998). Morphological characteristics of hybrids between white clover, Trifolium repens L., and Caucasian clover, Trifolium ambiguum M. Bieb. Plant Breeding 117(5): 494-496. {a} Inst. Grassland Environ. Res., Plas Gogerddan, Aberystwyth, Ceredigion SY23 3EB, UK

Sharma, S. B., K. R. Hancock, et al. (1998). Expression of a sulfur-rich maize seed storage protein, delta-zein, in white clover (Trifolium repens) to improve forage quality. Molecular Breeding 4(5): 435-448. {a} Plant Molecular Genetics Lab., Grassland Div., AgRes., Tennent Drive, Private Bag 11008, Palmerston North, New Zealand

Anderson, G. C., G. J. Blair, et al. (1998). Soil-extractable sulfur and pasture response to applied sulfur: 2. Seasonal variation in soil sulfur tests and sulfur response by pastures under field conditions. Australian Journal of Experimental Agriculture 38(6): 575-582. {a} CSIRO Plant Ind., Private Bag PO, Wembley, WA 6014, Australia

Anderson, G. C., G. J. Blair, et al. (1998). Soil-extractable sulfur and pasture response to applied sulfur: 1. Studies under glasshouse conditions. Australian Journal of Experimental Agriculture 38(6): 567-574. {a} CSIRO Plant Ind., Private Bag PO, Wembley, WA 6014, Australia

Nauggaard, N. H., N. A. De, et al. (1998). A field study of nitrogen dynamics and spring barley growth as affected by the quality of incorporated residues from white clover and ryegrass. Plant and Soil 203(1): 91-101. {a} Plant Biol. Biochem. Dep., RISO Natl. Lab., P.O. Box 49, DK-4000 Roskilde, Denmark

Wright, D. P., D. J. Read, et al. (1998). Mycorrhizal sink strength influences whole plant carbon balance of Trifolium repens L. Plant Cell and Environment 21(9): 881-891. {a} Dep. Anim. Plant Sci., Univ. Sheffield, Sheffield S10 2TN, UK

Bouchart, V., J. H. MacDuff, et al. (1998). Seasonal pattern of accumulation and effects of low temperatures on storage compounds in Trifolium repens. Physiologia Plantarum 104(1): 65-74. {a} U.A. INRA Physiol. Biochim. Veg., Inst. Rech. Biol. Appliquee, Univ. Caen, F-14032 Caen Cedex, France

Sharma, A., R. Ram, et al. (1998). Rubus ellipticus, a perennial weed host of prunus necrotic ring spot virus in India. Plant Disease 82(11): 1283. Plant Virus Laboratory, Floriculture Division, Institute of Himalayan Bioresource Technology, Palampur-176061, H.P., India

Dale, H. and M. C. Press (1998). Elevated atmospheric CO2 influences the interaction between the parasitic angiosperm Orobanche minor and its host Trifolium repens. New Phytologist 140(1): 65-73. {a} Dep. Anim. Plant Sciences, Univ. Sheffield, Sheffield S10 2TN, UK

Lemieux, C. and C. Delisle (1998). Using cover crops to establish white and black spruce on abandoned agricultural lands. Phytoprotection 79(1): 21-33. {a} Agric. Agri-Food Canada, Soils Crops Res. Dev. Center, 2560 Hochelaga Blvd., Sainte-Foy, PQ G1V 2J3, Canada

Phillips, C. J. C. and N. L. James (1998). The effect of including white clover in perennial ryegrass swards and the height of mixed swards on the milk production, sward selection and ingestive behaviour of dairy cows. Animal Science Pencaitland 67(2): 195-202. {a} Dep. Clinical Vet. Med., Univ. Cambridge, Cambridge CB3 0ES, UK

Karlsson, S. E. M., I. Rydberg, et al. (1998). Strategy for catch crop development. II. Screening of species undersown in spring barley (Hordeum vulgare L.) with respect to catch crop growth and grain yield. Acta Agriculturae Scandinavica Section B Soil and Plant Science 48(1): 26-33. {a} Dep. Plant Biol., Upps. Genet. Cent., SLU, P.O. Box 7080, SE-750 07 Uppsala, Sweden

Isobe, K. and Y. Tsuboki (1998). The relationship between growth promotion by arbuscular mycorrhizal fungi and root morphology and phosphorus absorption in gramineous and leguminous crops. Japanese Journal of Crop Science 67(3): 347-352. {a} Coll. Bioresour. Sci., Nihon Univ., Fujisawa 252-0813, Japan

Marshall, A. H., S. K. Koldbrook, et al. (1998). Growth and reproductive characteristics in backcross hybrids derived from Trifolium repens L. X T. nigrescens Viv. interspecific crosses. Euphytica 104(1): 61-66. Legume Breeding Group, IGER, Plas Gogerddan, Aberystwyth SY23 3EB, UK

Brauer, D. (1998). Assessing the relative effects of hydrogen aluminum ions on primary root growth of white clover seedlings. Journal of Plant Nutrition 21(11): 2429-2439. {a} USDA/ARS/NAA, Appalachian Soil Water Conservation Res. Lab., P.O. Box 400, Beaver, WV 25813, USA

Heraut, B. V., C. Robin, et al. (1998). Effects of R:FR ratio on developing leaves in white clover. Net CO2 assimilation, photochemical activity and leaf morphology. Comptes Rendus de l'Academie des Sciences Serie III Sciences de la Vie 321(8): 679-687. {a} Unite Associee Inra-Ensaia, BP 172, 54505 Vandoeuvre-les-Nancy Cedex, France

Tchebotsar, V. K., U. G. Kang, et al. (1998). The use of GUS-reporter gene to study the effect of Azospirillum-Rhizobium coinoculation on nodulation of white clover. Biology and Fertility of Soils 27(4): 349-352. {a} National Inst. Agrobiological Resources, Tsukuba, Ibaraki 305, Japan

Liu, F. Y., J. Hodgson, et al. (1998). Effects of grazing sequence and condensed tannins on ingestive behaviour, herbage intake, and performance of lambs grazing Yorkshire fog pasture. New Zealand Journal of Agricultural Research 41(3): 359-366. {a} Dep. Plant Sci., Massey Univ., Private Bag 11 222, Palmerston North, New Zealand

Bourdot, G. W., G. A. Hurrell, et al. (1998). Weed flora of cereal crops in Canterbury, New Zealand. New Zealand Journal of Crop and Horticultural Science 26(3): 233-247. New Zealand Pastoral Agric. Res. Inst. Ltd., P. O. Box 60, Lincoln, New Zealand

Refi, R. O. and C. J. Escuder (1998). Nitrogen fixation by Trifolium repens and Lotus tenuis-based pastures in the Flooding Pampa, Argentina. Agronomie Paris 18(4): 285-297. {a} Fac. Ciencias Agrar., Univ. Nac. Rosario, Rosario, Argentina

Morton, J. D., A. G. Sinclair, et al. (1998). Pasture yield responses to sulphur fertilisers in relation to nutrient ratios in white clover. New Zealand Journal of Agricultural Research 41(3): 313-323. {a} AgRes., Invermay Agric. Cent., Private Bag 50034, Mosgiel, New Zealand

Bluett, S. J., C. Matthew, et al. (1998). The relationship between herbage mass and pasture accumulation rate in winter. New Zealand Journal of Agricultural Research 41(3): 299-305. {a} Dep. Plant Sci., Massey Univ., Private Bag 11-222, Palmerston, New Zealand

Trytsman, M., A. J. Kruger, et al. (1997). Production of irrigated Trifolium repens L. under a cutting regime in the subtropical region of Gauteng, South Africa. African Journal of Range and Forage Science 14(3): 81-86. {a} ARC-Range Forage Inst., Private Bag X05, Lynn East 0039, South Africa

Abberton, M. T., Y. T. P. T. Michaelson, et al. (1998). Characterization of novel inbred lines of white clover (Trifolium repens L.): I. Dynamics of plant growth and nodule development in flowing solution culture. Euphytica 103(1): 35-43. {a} Inst. Grassland Environ. Res., Aberystwyth, Ceredigion SY23 3EB, UK

Harrington, K. C. and A. Rahman (1998). Tolerance to herbicides of ground cover species for New Zealand orchards. Plant Protection Quarterly 13(3): 111-115. {a} Dep. Plant Sci., Massey Univ., Palmerston North, New Zealand

Michaelson, H. T. P. T., J. H. Macduff, et al. (1998). Characterization of a novel inbred lines of white clover (Trifolium repens L.). II. Variation in N2 fixation, NO3- uptake and their interactions. Euphytica 103(1): 45-54. {a} Inst. Grassland Environ. Res., Aberystwyth, Dyfed SE23 3EB, UK

Cuttle, S. P., R. V. Scurlock, et al. (1998). A 6-year comparison of nitrate leaching from grass/clover and N-fertilized grass pastures grazed by sheep. Journal of Agricultural Science 131(1): 39-50. {a} Inst. Grassland Environ. Res., Plas Gogerddan, Aberystwyth, Ceredigion SY23 3EB, UK

Hameleers, A. and R. W. Mayes (1998). The use of n-alkanes to estimate herbage intake and diet composition by dairy cows offered a perennial ryegrass/white clover mixture. Grass and Forage Science 53(2): 164-169. {a} SAC, Food and Farm. Syst. Dep., Crichton Royal Farm, Mid Park, Bankend Road, Dumfries DG1 4SZ, UK

Wilman, D. and M. P. Rezvani (1998). Volume, surface area and cellular composition of chewed particles of plant parts of eight forage species and estimated degradation of cell wall. Journal of Agricultural Science 131(1): 69-77. {a} Welsh Inst. Rural Studies, Univ. Wales, Aberystwyth, Ceredigion SY23 3AL, UK

Williams, T. A., M. T. Abberton, et al. (1998). Evaluation of seed production potential in white clover (Trifolium repens L.) varietal improvement programmes. Grass and Forage Science 53(2): 197-207. {a} Legume Breeding Group, IGER, Plas Gogerddan, Aberystwyth SY23 3EB, UK

Rezvani, M. P. and D. Wilman (1998). Cell wall thickness and cell dimensions in plant parts of eight forage species. Journal of Agricultural Science 131(1): 59-67. {a} Welsh Inst. Rural Studies, Univ. Wales, Aberystwyth, Ceredigion SY23 3AL, UK

Wilman, D. and M. P. Rezvani (1998). In vitro digestibility and neutral detergent fibre and lignin contents of plant parts of nine forage species. Journal of Agricultural Science 131(1): 51-58. {a} Welsh Inst. Rural Studies, Univ. Wales, Aberystwyth, Ceredigion SY23 3AL, UK

Vidor, M. A. and A. V. Jacques (1998). Performance of a natural pasture sod-seeded with cold-season legumes and evaluated under cutting and grazing conditions: 1. Availability of dry matter, digestible organic matter and crude protein. Revista Brasileira de Zootecnia 27(2): 267-271. {a} Parte de Dissertacao de Mestrado apresentada pelo primeiro autor a Universidade Federal Rio Grande Do Sul, 59600 Mossore, RN, Brazil

Canto, M. W. D., E. L. Moojen, et al. (1998). Production of forage in a Italian ryegrass pasture (Lolium multiflorum Lam) + white clover (Trifolium repens L.) submitted to different levels of dry matter residues. Revista Brasileira de Zootecnia 27(2): 231-237. {a} Universidade Estadual de Maringa 87020-900, Maringa, PR, Brazil

Brink, G. E., T. E. Fairbrother, et al. (1998). Seasonal variation in morphology of continuously stocked white clover. Crop Science 38(5): 1224-1228. {a} USDA-ARS, Forage Res. Unit, P.O. Box 5367, Mississipi State, MS 39762, USA

Milukaite, A. (1998). Flux of benzo(a)pyrene to the ground surface and its distribution in the ecosystem. Water Air and Soil Pollution 105(1-2): 471-480. {a} Inst. Physics, A. Gostauto 12, 2600 Vilnius, Lithuania

Selvarajan, R. and M. D. Gupta (1996). Characterization of a virus causing mosaic on gladiolus. International Journal of Tropical Plant Diseases 14(2): 217-222. {a} Natl. Res. Cnet. on Banana, No. 44, Ramalinganagar, South Extension, Vayalur Rd., Trichy 620 017, India

Staddon, P. L., J. D. Graves, et al. (1998). Effect of enhanced atmospheric CO2 on mycorrhizal colonization by Glomus mosseae in Plantago lanceolata and Trifolium repens. New Phytologist 139(3): 571-580. {a} Dep. Biol., Univ. York, PO Box 373, York YO1 5YW, UK

Vassilev, N., M. Vassileva, et al. (1998). Fertilizing effect of microbially treated olive mill wastewater on Trifolium plants. Bioresource Technology 66(2): 133-137. {a} Estac. Exp. Zaidin, CSIC, Prof. Albareda 1, 18008 Granada, Spain

Gautier, H., G. C. Varlet, et al. (1998). Comparison of horizontal spread of white clover (Trifolium repens L.) grown under two artificial light sources differing in their content of blue light. Annals of Botany London 82(1): 41-48. {a} INRA, Unite Bioclimatol., Domaine St. Paul, Site Agroparc, 84914 Avignon Cedex 9, France

Malinowski, D. P., D. P. Belesky, et al. (1998). Photosynthesis of white clover (Trifolium repens L.) germplasms with contrasting leaf size. Photosynthetica Prague 35(3): 419-427. {a} USDA-ARS, Appalachian Soil Water Conservation Res. Lab., P.O. Box 400, Beaver, VA 25813, USA

Beretta, V. and J. F. P. Lobato (1998). Intensive beef cattle production system: Evaluation of alternative winter feeding strategies for replacement heifers. Revista Brasileira de Zootecnia 27(1): 157-163. {a} Aluno CPG, Zootenia, UFRGS, Porto Alegre, Bolsista IB CNPq, Caixa Postal 776-90.001-970 Porto Alegre, RS, Brazil

Lobato, J. F. P., F. Deresz, et al. (1998). Improved pastures and supplementary feeding on the reproductive performance of primiparous cows. Revista Brasileira de Zootecnia 27(1): 47-53. {a} Dep. Zootecnia/Fac. Agronomia, UFRGS, Caixa Postal, 776-90001-970, Porto Alegre, RS, Brazil

Lawson, A. R., K. B. Kelly, et al. (1998). Defoliation frequency and genotype effects on stolon and root reserves in white clover. Australian Journal of Agricultural Research 49(6): 983-988. {a} Kyabram Dairy Cent., Inst. Sustainable Irrigated Agric., Dep. Nat. Res. Environ., RMB 3010, Kyabram, Vic. 3620, Australia

Eerens, J. P. J., R. J. Lucas, et al. (1998). Influence of the ryegrass endophyte (Neotyphodium lolii) in a cool-moist environment: II. Sheep production. New Zealand Journal of Agricultural Research 41(2): 191-199. {a} AgResearch, Ruakura Agric. Res. Cent., Private Bag 3123, Hamilton, New Zealand

Di, H. J., K. C. Cameron, et al. (1998). Nitrate leaching for dairy shed effluent and ammonium fertiliser applied to a free-draining pasture soil under spray or flood irrigation. New Zealand Journal of Agricultural Research 41(2): 263-270. Soil Plant Ecol. Sci. Div., P.O. Box 84, Lincoln Univ., Canterbury, New Zealand

Dudas, B., D. R. Woodfield, et al. (1998). Estimating the agronomic impact of white clover mosaic virus on white clover performance in the North Island Of New Zealand. New Zealand Journal of Agricultural Research 41(2): 171-178. {a} AgResearch Grasslands, Private Bag 11 008, Palmerston North, New Zealand

Eerens, J. P. J., R. J. Lucas, et al. (1998). Influence of the ryegrass endophyte (Neotyphodium lolii) in a cool-moist environment: III. Interaction with white clover. New Zealand Journal of Agricultural Research 41(2): 201-207. {a} AgResearch, Ruakura Agric. Res. Cent., Private Bag 3123, Hamilton, New Zealand

Eerens, J. P. J., M. H. P. W. Visker, et al. (1998). Influence of the ryegrass endophyte (Neotyphodium lolii) in a cool moist environment: IV. Plant parasitic nematodes. New Zealand Journal of Agricultural Research 41(2): 209-217. {a} AgResearch, Ruakura Agric. Res. Cent., Private Bag 3123, Hamilton, New Zealand

Hjelle, K. L. (1998). Herb pollen representation in surface moss samples from mown meadows and pastures in western Norway. Vegetation History and Archaeobotany 7(2): 79-96. {a} Dep. Botany, Univ. Bergen, Allegt. 41, N-5007 Bergen, Norway

Fraser, M. D. (1998). Diet composition of guanacos (Lama guanicoe) and sheep (Ovis aries) grazing in grassland communities typical of UK uplands. Small Ruminant Research 29(2): 201-212. {a} Animal Sci. Microbiol. Dep., Inst. Grassland Environ. Res., Plas Gogerddan, Aberystwyth, Ceredigion SY23 3EB, UK

Hopkins, D. L., A. S. Beattie, et al. (1998). Meat quality of cryptorchid lambs grazing either dryland or irrigated perennial pasture with some silage supplementation. Meat Science 49(3): 267-275. {a} NSW Agriculture, P.O. Box 129, Cowra, NSW 2794, Australia

del, P. M., K. Osoro, et al. (1998). Effects of complementary grazing by goats on sward composition and on sheep performance managed during lactation in perennial ryegrass and white clover pastures. Small Ruminant Research 29(2): 173-184. {a} CIATA, Apdo 13, 33300 Villaviciosa, Asturias, Spain

Hanano, Y., Y. Fujii, et al. (1998). Weed control by hairy vetch (Vicia villosa LOTH.) in Shikoku area: Vegetation test and field survey in 1993 to 1997. Bulletin of the Shikoku National Agricultural Experiment Station(62): 45-69.

Zimmermann, L. R., A. A. Galussi, et al. (1998). Hard seed viability in Medicago sativa L., Lotus corniculatus L., Trifolium repens L., Trifolium pratense L. and Melilotus alba Med. Seed Science and Technology 26(1): 271-273. {a} Fac. Ciencias Agropecuarias, Univ. Nac. Entre Rios, CC 24, 3100 Parana Entre Rios, Argentina

Monaghan, R. M., J. D. Morrison, et al. (1998). Soil acidification through carbon cycling in legumes: A pot experiment examining the contributions from white clover, lotus, caucasian clover, and lucerne. New Zealand Journal of Agricultural Research 41(2): 243-250. AgResearch, Invermay Agric. Cent., Private Bag 50034, Mosgiel, New Zealand

Brink, G. E. and G. A. Pederson (1998). White clover response to a water-application gradient. Crop Science 38(3): 771-775. {a} USDA-ARS, Forage Res. Unit, P.O. Box 5367, Mississippi State, MS 39762, USA

Bailey, J. S. and A. S. Laidlaw (1998). Growth and development of white clover (Trifolium repens L.) as influenced by P and K nutrition. Annals of Botany London 81(6): 783-786. {a} Dep. Agric. Northern Ireland, Agric. Environ. Sci. Div., Newforge Lane, Belfast BT9 5PX, UK

Williams, W. M., K. M. Mason, et al. (1998). Genetic analysis of shikimate dehydrogenase allozymes in Trifolium repens L. Theoretical and Applied Genetics 96(6-7): 859-868. {a} AgRes. Grassland, Private Bag 11008, Palmerston North, New Zealand

Fulkerson, W. J., K. Slack, et al. (1998). Nutrients in ryegrass (Lolium spp.), white clover (Trifolium repens) and kikuyu (Pennisetum clandestinum) pastures in relation to season and stage of regrowth in a subtropical environment. Australian Journal of Experimental Agriculture 38(3): 227-240. {a} NSW Agric., Wollongbar Agric. Inst., Wollongbar, NSW 2477, Australia

Collins, R. P., M. T. Abberton, et al. (1998). Effects of divergent selection on correlations between morphological traits in white clover (Trifolium repens L.). Euphytica 101(3): 301-305. Legume Breeding Group, Inst. Grassland Environ. Res. Plas Gogerddan, Aberystwyth, Ceredigion SY23 3EB, UK

McNabb, W. C., J. S. Peters, et al. (1998). Effect of condense tannins prepared from several forages on the in vitro precipitation of ribulose-1,5-bisphosphate carboxylase (Rubisco) protein and its digestion by trypsin (EC 2.4.21.4) and chymotrypsin (EC 2.4.21.1). Journal of the Science of Food and Agriculture 77(2): 201-212. {a} AgRes., Grassl. Res. Cent., Private Bag 11008, Palmerston North, New Zealand

Hay, A., L. Watson, et al. (1998). Identification of cell wall proteins in roots of phosphate-deprived white clover plants. Plant Physiology and Biochemistry Paris 36(4): 305-311. {a} Dep. Plant Biol. and Biotechnol., Massey Univ., Private Bag 11222, Palmerston North, New Zealand

Murakami, R. and A. Shirata (1998). Producting condition of the toxic components from Myrothecium roridum and it's toxicity to various plants. Journal of Sericultural Science of Japan 67(2): 135-142. Natl. Inst. Sericultural Entomol. Sci., 1-2, Ohwasi, Tsukuba, Ibaraki 305-8634, Japan

Hanninen, K. S. (1998). Effect of clovers as vegetative ground cover on the growth of red birch in nursery field production. Journal of Horticultural Science and Biotechnology 73(3): 393-398. {a} Univ. Oulu, Dep. Biol., FIN-90570 Oulu, Finland

Wilcox, A. (1998). Early plant succession on former arable land. Agriculture Ecosystems and Environment 69(2): 143-157. {a} Crop Environ. Res. Centre, Harper Adams, Newport TF10 8NB, UK

Caradus, J. R. and B. R. Christie (1998). Winterhardiness and artificial frost tolerance of white clover ecotypes and selected breeding lines. Canadian Journal of Plant Science 78(2): 251-255. AgResearch Grasslands, Private Bag 11008, Palmerston North, New Zealand

Gooding, M. J., N. D. Cosser, et al. (1998). Sheep grazing and defoliation of contrasting varieties of organically grown winter wheat with and without undersowing. Grass and Forage Science 53(1): 76-87. {a} Dep. Agric., Univ. Reading, Earley Gate, P.O. Box 236, Reading, Berkshire RG6 6AT, UK

McKirdy, S. J., R. A. C. Jones, et al. (1998). Determining the effectiveness of grazing and trampling by livestock in transmitting white clover mosaic and subterranean clover mottle viruses. Annals of Applied Biology 132(1): 91-105. {a} Agric. Western Australia, Locked Bag No. 4, Bentley Delivery Centre, WA 6983, Australia

Caradus, J. R. and D. R. Woodfield (1998). Genetic control of adaptive root characteristics in white clover. Plant and Soil 200(1): 63-69. AgRes. Grasslands, Private Bag 11008, Palmerston North, New Zealand

Wright, D. P., J. D. Scholes, et al. (1998). Effects of VA mycorrhizal colonization on photosynthesis and biomass production of Trifolium repens L. Plant Cell and Environment 21(2): 209-216. {a} Robert Hill Inst., Dep. Anim. Plant Sci., Univ. Sheffield, Sheffield S10 2TN, UK

Balzter, H., P. W. Braun, et al. (1998). Cellular automata models for vegetation dynamics. Ecological Modelling 107(2-3): 113-125. {a} Biometrie und Populationsgenet., Univ. Giessen, Ludwigstr. 27, D-35390 Giessen, Germany

Schroeder, N. C., R. B. Chapman, et al. (1998). Effect of potato mirid (Calocoris norvegicus) on white clover seed production in small cages. New Zealand Journal of Agricultural Research 41(1): 111-116. {a} Dep. Entomol. and Anim. Ecol., P.O. Box 84, Lincoln Univ., Lincoln, New Zealand

Ledergerber, S., P. W. Leadley, et al. (1998). Feeding behaviour of juvenile snails (Helix pomatia) to four plant species grown at elevated atmospheric CO2. Acta Oecologica 19(1): 89-95. {a} Sect. Conservation Biol., Dep. Integrative Biol., Univ. Basel, St. Johanns-Vorstadt 10, CH-4056 Basel, Switzerland

Ogura, S. I., M. Ohta, et al. (1998). Intra-ruminal property of sheep under white clover ingestion. 1. Foam stability of ruminal fluid, ruminal fermentation and ruminal motility under restricted feeding of white clover and orchardgrass. Grassland Science 43(4): 368-373. {a} Chugoku Natl. Agric. Exp. Stn., Kawai, Oda, Shimane 694, Japan

Woodman, R. F., W. L. Lowther, et al. (1998). Establishment response of 12 legumes to nitrogen fertiliser rate and placement when direct drilled into Hieracium-infested, montane tussock grasslands. New Zealand Journal of Agricultural Research 41(1): 53-63. {a} AgRes., Invermay Agric. Cent., Private Bag 50034, Mosgiel, New Zealand

Caradus, J. R. and D. F. Chapman (1998). Growth in grazed pastures of white clover breeding lines selected for extremes of leaf size, internode length, and nodal branching. New Zealand Journal of Agricultural Research 41(1): 49-52. {a} AgRes. Grasslands, Private Bag 11008, Palmerston North, New Zealand

Nie, Z. N., D. J. Barker, et al. (1998). Influence of the timing and duration of pastoral fallowing and nitrogen fertiliser on pasture and white clover (Trifolium repens) growth in hill country. New Zealand Journal of Agricultural Research 41(1): 19-29. {a} Dep. Anim. Prod., Univ. Melbourne, RMB 6200, Terang, VIC 3264, Australia

Fukuda, E., M. Yoshida, et al. (1998). A mathematical model on the dynamics of hardseededness of Trifolium repens L. seeds following the retention in the bovine rumen. Grassland Science 43(4): 398-405. {a} Tohoku Natl. Agric. Exp. Stn., Morioka 020-01, Japan

Hummel, R. L., R. L. Brandenburg, et al. (1998). Effects of ozone on reproduction of twospotted spider mite (Acari: Tetranychidae) on white clover. Environmental Entomology 27(2): 388-394. {a} Dep. Entomol., North Carolina State Univ., Raleigh, NC 27695-7613, USA

Vassileva, M., N. Vassilev, et al. (1998). Rock phosphate solubilization by Aspergillus niger on olive cake-based medium and its further application in a soil-plant system. World Journal of Microbiology and Biotechnology 14(2): 281-284. {a} Estacion Experimental Zaidin, CSIC, Prof. Albareda, 1 Granada-18008, Spain

Norton, M. R. and G. R. Johnstone (1998). Occurrence of alfalfa mosaic, clover yellow vein, subterranean clover red leaf, and white clover mosaic viruses in white clover throughout Australia. Australian Journal of Agricultural Research 49(4): 723-728. {a} NSW Agric., Wagga Wagga Agric. Inst., Wagga Wagga, NSW 2650, Australia

Vlassak, K. M., E. Luyten, et al. (1998). The Rhizobium sp. BR816 nodO gene can function as a determinant for nodulation of Leucaena leucocephala, Phaseolus vulgaris, and Trifolium repens by a diversity of Rhizobium spp. Molecular Plant Microbe Interactions 11(5): 383-392. {a} F. A. Janssens Lab. Genet., K. Mercierlaan 92, B-3001 Heverlee, Belgium

Marilley, L., G. Vogt, et al. (1998). Bacterial diversity in the bulk soil and rhizosphere fractions of Lolium perenne and Trifolium repens as revealed by PCR restriction analysis of 16S rDNA. Plant and Soil 198(2): 219-224. Lab. Microbiologie, Univ. Neuchatel, Rue Emile-Argand 11, CH-2007 Neuchatel, Switzerland

Ogura, S. I. and K. Sugawara (1998). The change of feeding behavior and intra-ruminal property with intake of white clover on sheep. Tohoku Journal of Agricultural Research 48(3-4): 63-73. {a} Lab. Land Ecol., Dep. Bio-remediation, Fac. Agric., Tohoku Univ., Sendai, Miyagi 981-8555, Japan

Taylor, J. E. and J. A. Thomson (1998). Bracken litter as mulch: Glasshouse evaluation of phytotoxicity. Australian Journal of Experimental Agriculture 38(2): 161-169. {a} Sch. Biol. Sci., Univ. New South Wales, Sydney, NSW 2052, Australia

Eckard, R. J. and D. R. Franks (1998). Strategic nitrogen fertiliser use on perennial ryegrass and white cloverpasture in north-western Tasmania. Australian Journal of Experimental Agriculture 38(2): 155-160. {a} Inst. Land Food Resour., Univ. Melbourne, RMB 2460, Hazeldean Road, Ellinbank, VIC 3820, Australia

Pederson, G. A. and G. E. Brink (1998). Cyanogenesis effect on insect damage to seedling white clover in a Bermudagrass sod. Agronomy Journal 90(2): 208-210. {a} USDA-ARS, Crop Sci. Res. Lab., Forage Res. Unit, PO Box 5367, Mississippi State, MS 39762, USA

Carter, M. R. and H. T. Kunelius (1998). Influence of non-inversion loosening on permanent pasture productivity. Canadian Journal of Soil Science 78(1): 237-239. Agric. and Agri-Food Can., Res. Cent., Charlottetown, Prince Edward Island C1A 7M8, Canada

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Elgersma, A. and L. Fengrui (1997). Effects of cultivar and cutting frequency on dynamics of stolon growth and leaf appearance in white clover grown in mixed swards. Grass and Forage Science 52(4): 370-380. {a} Wageningen Agric. Univ., Dep. Agron., Haarweg 333, 6709 RZ Wageningen, Netherlands

Frankow, L. B. E., K. Svanang, et al. (1997). Effects of an autumn defoliation on overwintering, spring growth and yield of a white-clover/grass sward. Grass and Forage Science 52(4): 360-369. {a} SLU, Dep. Crop Prod. Sci., P.O. Box 7043, S-750 07 Uppsala, Sweden

Gooding, R. F. and J. Frame (1997). Effects of continuous sheep stocking and strategic rest periods on the sward characteristics of binary perennial grass/white clover associations. Grass and Forage Science 52(4): 350-359. {a} SAC Auchincruive, Ayr KA6 5HW, UK

Staley, T. E. and D. R. Morris (1998). A model system for assessing low-level liming effects on white clover symbiosis development in an acidic soil. Soil Science 163(3): 230-240. {a} USDA-ARS-NAA, Appalachian Soil Water Conservation Res. Lab., PO Box 400, Beaver, WV 25813-0400, USA

Bernard, E. C. and P. L. Jennings (1997). Host range and distribution of the clover root-knot nematode, Meloidogyne trifoliophila. Journal of Nematology 29(4 Suppl.): 662-672. Dep. Entomol. Plant Pathol., Univ. Tenn., Box 1071, Knoxville, TN 37901-1071, USA

Mercer, C. F. and K. J. Miller (1997). Evaluation of 15 trifolium spp. and of Medicago sativa as hosts of four Meloidogyne spp. found in New Zealand. Journal of Nematology 29(4 Suppl.): 673-676. AgRes. Grasslands, PB 11-008, Palmerston North, New Zealand

Sholberg, P. L., E. J. Hogue, et al. (1998). Effect of orchard cover crop on incidence of low-temperature-basidiomycete rot of stored Spartan apples. Canadian Journal of Plant Science 78(1): 125-129. Agriculture Agri-Food Canada, Pacific Agri-Food Res. Cent., Summerland, BC V0H 1Z0, Canada

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Vasseur, L. and C. Potvin (1998). Natural pasture community response to enriched carbon dioxide atmosphere. Plant Ecology 135(1): 31-41. {a} Dep. Biol., Saint-Mary's Univ., Halifax, NS B3H 3C3, Canada

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Kouame, C. N., K. H. Quesenberry, et al. (1998). Genetic diversity for root-knot nematode resistance in white clover and related species. Genetic Resources and Crop Evolution 45(1): 1-8. {a} Inst. des Savanes 01 BP 633 Bouake, Cote d'Ivoire, Ivory Coast

Michaelson, Y. T. P. T., A. H. Marshall, et al. (1997). The use of isoenzyme markers to determine pollen flow and seed paternity mediated by Apis mellifera and Bombus spp. in Trifolium repens, a self-incompatible plant species. Journal of Apicultural Research 36(2): 57-62. {a} Inst. Grassl. Environ. Res., Plas Gogerddan, Aberystwyth, Dyfed SY23 3EB, UK

Gudmundsson, J. (1997). Seed production potential of native legumes in Iceland. Buvisindi 11: 41-48. {a} Rannsoknastofnun Landbunadarins, Keldnaholti, 112 Reykjavik, Iceland

Orradottir, B. and A. Helgadottir (1997). Collection of Icelandic legumes. Buvisindi 11: 9-27. Rannsoknastofnun Landbunadarins, Keldnaholti, 112 Reykjavik, Iceland

Yeates, G. W., S. Saggar, et al. (1998). Impact of clover cyst nematode (Heterodera Trifolii) infection on soil microbial activity in the rhizosphere of white clover (Trifolium repens). A pulse-labelling experiment. Nematologica 44(1): 81-90. {a} Landcare Res., Private Bag 11052, Palmerston North, New Zealand

Abdin, O., B. E. Coulman, et al. (1998). Yield and yield components of corn interseeded with cover crops. Agronomy Journal 90(1): 63-68. {a} Dep. Plant Sci., Macdonald Campus, McGill Univ., 21111 Lakeshore Rd., Ste. Anne de Bellevue, PQ H9X 3V9, Canada

Hamilton, N. R. S. and M. J. M. Hay (1998). Vascular architecture of a large-leafed genotype of Trifolium repens. Annals of Botany London 81(3): 441-448. {a} Environ. Biol. Dep., Inst. Grassland Environ. Res., Plas Gogerddan, Aberystwyth, Ceredigion SY23 3EB, UK

Kiso, S. and M. Noshiro (1997). Management methods for early harvesting timothy (Phleum pratense L.) dominant meadows. 2. Effects of early harvest on botanical composition, dry matter yield and total digestible nutrients contents in timothy-white clover (Trifolium repens L.) mixtures. Grassland Science 43(3): 258-265. {a} Hokkaido Tenpoku Agric. Exp. Station, Midorigaoka, Hamatonbetsu-cho, Esashi-gun, Hokkaido 098-57, Japan

Ibekwe, A. M., J. S. Angle, et al. (1998). Zinc and cadmium effects on rhizobia and white clover using chelator-buffered nutrient solution. Soil Science Society of America Journal 62(1): 204-211. {a} Dep. Agron., Univ. Md., College Park, MD 20742, USA

Frankow, L. B. E. (1997). Pests and diseases of white clover leaves in Sweden. Vaxtskyddsnotiser 61(4): 113-115. {a} SLU, Inst. Vaxtodlingslara, Box 7043, S-750 07 Uppsala, Sweden

Cowan, A. A., A. H. Marshall, et al. (1997). Influence of moisture availability on yield and quality of Trifolium species. Seed Science and Technology 25(3): 523-535. Inst. Grassland Environmental Res., Plas Gogerddan, Aberystwyth, Ceredigion SY23 3EB, UK

White, T. A., B. D. Campbell, et al. (1997). Invasion of temperate grassland by a subtropical annual grass across an experimental matrix of water stress and disturbance. Journal of Vegetation Science 8(6): 847-854. {a} AgRes., Grassland Res. Cent., Private Bag 11008, Palmerston North, New Zealand

Elgersma, A. and J. Hassink (1997). Effects of white clover (Trifolium repens L.) on plant and soil nitrogen and soil organic matter in mixtures with perennial ryegrass (Lolium perenne L.). Plant and Soil 197(2): 177-186. {a} C.T. de Wit Graduate Sch. Production Ecology, Wageningen Agricultural Univ., Dep. Agronomy, Haarweg 333, 6709 RZ Wageningen, Netherlands

Manderscheid, R., J. Bender, et al. (1997). Response of biomass and nitrogen yield of white clover to radiation and atmospheric CO2 concentration. Environmental and Experimental Botany 38(2): 131-143. {a} Inst. Ecotoxicol., Federal Agric. Res. Cent., Bundesallee 50, D-38116 Braunschweig, Germany

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McPhee, C. S., S. P. Bonser, et al. (1997). The role of apical dominance in the interpretation of adaptive architecture in prostrate plant species. Ecoscience 4(4): 490-500. Dep. Biol., Queen's Univ., Kingston, ON K7L 3N6, Canada

Lane, L. A., J. F. Ayres, et al. (1997). A review of the introduction and use of white clover (Trifolium repens L.) in Australia-significance for breeding objectives. Australian Journal of Experimental Agriculture 37(7): 831-839. {a} NSW Agric., Agric. Res. Advisory Station, Glen Innes, NSW 2370, Australia

Turner, L. B. and C. J. Pollock (1998). Changes in stolon carbohydrates during the winter in four varieties of white clover (Trifolium repens L.) with contrasting hardiness. Annals of Botany London 81(1): 97-107. Inst. Grassland Environ. Res., Plas Gogerddan, Aberystwyth, Ceredigion, SY23 3EB, UK

Hussain, S. W., W. M. Williams, et al. (1997). Transfer of clover cyst nematode resistance from Trifolium nigrescens Viv. to T. repens L. by interspecific hybridisation. Theoretical and Applied Genetics 95(8): 1274-1281. {a} AgResearch Grasslands, Private Bag 11008, Palmerston North, New Zealand

El, K. Z. A., J. S. Angle, et al. (1997). Zinc and cadmium effects on the early stages of nodulation in white clover. Agronomy Journal 89(6): 875-880. {a} Dep. Agronomy, Univ. Md., College Park, MC 20742, USA

Schneider, B., C. Marcone, et al. (1997). Characterization and classification of phytoplasmas from wild and cultivated plants RFLP and sequence analysis of ribosomal DNA. European Journal of Plant Pathology 103(8): 675-686. {a} Biol. Bundesanstalt Land- Forstwirtschaft, Inst. Pflanzenschutz Obstbau, D-69221 Dossenheim, Germany

Del, P. M. and K. Osoro (1997). Effect of sward height and vertical distribution of clover on performance of cashmere goats in autumn. Grass and Forage Science 52(3): 269-277. {a} CIATA, Apdo. 13, 33300 Villaviciosa, Asturias, Spain

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Barthram, G. T. (1997). Shoot chara