Responses of Italian ryegrass to phosphorus on highly‐weathered soils

References

• Barber , S.A. 1980 . “ Soil‐plant interactions in the phosphorus nutrition of plants ” . In The role of phosphorus in agriculture , Edited by: Khasawneh , F.E. , Sample , E.C. and Kamprath , E.J. 591 – 616 . Madison, Wisconsin : Amer. Soc. Agron. .
   Google Scholar
• Bartholomew , P.E. 1985 . Beef production from kikuyu and Italian ryegrass , Pietermaritzburg : University of Natal . Ph.D. thesis,
   Google Scholar
• Baylor , J.E. 1974 . “ Satisfying the nutritional requirements of grass‐legume mixtures ” . In Forage fertilization , Edited by: Mays , D.A. 171 – 188 . Madison, Wisconsin : Amer. Soc. Agron. .
   Google Scholar
• Cate , R.B. and Nelson , L.A. 1971 . A simple statistical procedure for partitioning soil test correlative data into two classes . Soil Sci. Soc. Amer. Proc. , 35 : 658 – 660 .
   Web of Science ®Google Scholar
• Du Plessis , T.M. 1986 . An evaluation of irrigated ryegrass/clover pastures for fat lamb production in the Highland Sourveld of Natal , Pietermaritzburg : University of Natal . Ph.D. thesis,
   Google Scholar
• Eckard , R.J. 1989 . The response of Italian ryegrass to applied nitrogen in the Natal Midlands . J. Grassl. Soc. South. Afr. , 6 : 19 – 22 .
   Google Scholar
• Farina , M.P.W. and Johnston , M.A. 1987 . Fertilization guidelines for maize production in Natal , Farming in South Africa (leaflet series). Maize F.2.4 Pretoria : Dept. Agric. & Water Supply .
   Google Scholar
• Fox , R.L. , Nishimoto , R.K. , Thompson , J.R. and De la Pena , R.S. 1974 . Comparative external phosphorus requirements of plants growing in tropical soils . Trans. 10th Inter. Congr. Soil Sci. (Moscow) , 4 : 232 – 239 .
   Google Scholar
• Gartrell , J.W. and Bolland , M.D.A. 1987 . “ Phosphorus nutrition of pastures ” . In Temperate pastures: Their production, use and management , Edited by: Wheeler , J.L. , Pearson , C.J. and Robards , G.E. 127 – 136 . Australia : Commonwealth Scientific and Industrial Research Organization .
   Google Scholar
• Goodenough , D.C.W. , Smith , A. and Smith , M. 1987 . The relative yield potential of Westerwolds and Italian ryegrass cultivars in autumn‐planted pastures and their flowering patterns following spring establishment . J. Grassl. Soc. South. Afr. , 4 : 35 – 39 .
   Google Scholar
• Grace , N.D. 1983 . “ Phosphorus ” . In The mineral requirements of grazing ruminants , New Zealand Soc. Anim. Prod., Occasional Publ., No. 9 Edited by: Grace , N.D. 106 – 111 .
   Google Scholar
• Mac Vicar , C.N. , De Villiers , J.M. , Loxton , R.F. , Verster , E. , Lambrechts , J.J.N. , Merryweather , F.R. , Le Roux , J. , Van Rooyen , T.H. and Harmse , H.J. von M. 1977 . Soil classification: A binomial system for South Africa , Dept. Agric. Tech. Serv., Sci. Bull. 390
   Google Scholar
• Mays , D.A. , Wilkinson , S.R. and Cole , C.V. 1980 . “ Phosphorus nutrition of forages ” . In The role of phosphorus in agriculture , Edited by: Khasawneh , F.E. , Sample , E.C. and Kamprath , E.J. 591 – 616 . Madison, Wisconsin : Amer. Soc. Agron. .
   Google Scholar
• Miles , N. Response of pasture species to applied P on highly‐weathered soils . Proceedings of phosphorus symposium . pp. 159 – 163 . Pretoria : Dept. Agric. & Water Supply .
   Google Scholar
• Ozanne , P.G. 1980 . “ Phosphate nutrition of plants — a general treatise ” . In The role of phosphorus in agriculture , Edited by: Khasawneh , F.E. , Sample , E.C. and Kamprath , E.J. 559 – 590 . Madison, Wisconsin : Amer. Soc. Agron. .
   Google Scholar
• Prins , W.H. , Den Boer , D.J. and Van Burg , P.F.J. 1985 . “ Requirements for phosphorus, potassium and other nutrients for grassland in relation to nitrogen usage ” . In Grassland manuring , Brit. Grassl. Soc., Occasional Symp. No. 20 Edited by: Cooper , J.P. and Raymond , W.F. 28 – 45 .
   Google Scholar
• Rangeley , A. and Newbould , P. 1982 . “ Herbage analyses and fertilizer responses of white clover in hill pastures ” . In Proc. 9th Inter. Plant Nutr. Colloquium , Edited by: Scaife , A. 521 – 526 . Commonwealth Agricultural Bureaux England .
   Google Scholar
• Reid , R.L. and Jung , G.A. 1974 . “ Effects of elements other than nitrogen on the nutritive value of forage ” . In Forage fertilization , Edited by: Mays , D.A. 395 – 436 . Madison, Wisconsin : Amer. Soc. Agron. .
   Google Scholar
• Smith , H.R.H. , Bransby , D.I. and Tainton , N.M. 1986 . The characterization of irrigated Italian ryegrass in the south‐eastern Transvaal Highveld using slaughter lambs . J. Grassl. Soc. South. Afr. , 3 : 14 – 18 .
   Google Scholar
• Sutton , C.D. 1969 . Effect of low soil temperature on phosphate nutrition of plants — a review . J. Sci. Fd. Agric. , 20 : 1 – 3 .
   Web of Science ®Google Scholar
• White , R.E. and Haydock , K.P. 1970 . Phosphate concentration in siratro as a guide to its phosphate status in the field . Aust. J. Exp. Agric. Anim. Husb. , 10 : 426 – 430 .
   Google Scholar