References
- Allison , F. E. 1966 . The fate of nitrogen applied to soils. . Adv. Agron. , 18 : 219 – 258 .
- Cowling , D. W. 1966 . Influence of various forms of nitrogenous fertilisers on the growth of a perennial ryegrass/white clover sward in early spring. . J. Br. Grassld Soc. , 21 : 187 – 194 .
- Gasser , J. K. R. 1964 . Urea as a fertiliser. . Soils Fertil. , 27 : 175 – 180 .
- Gosnell , J. M. 1957 . Studies on Eragrostis curvula , Pietermaritzburg : Univ. of Natal . M.Sc. thesis,
- Henzell , E. F. 1962 . “ The use of nitrogen fertilisers on pastures in the sub‐tropics and tropics ” . In part V of A review of nitrogen in the tropics with partciular reference to pastures edited by a Com. of the Div. of Tropical Pastures, C.S.I.R.O., Australia , England : CAB, Farnham Royal .
- Lyon , T. L. , Buckman , H. O. and Brady , N. C. 1952 . The nature and properties of soils. , 5th ed. , New York : Macmillan .
- Nelson , L. B. 1965 . Advances in fertilisers. . Adv. Agron. , 17 : 1 – 84 .
- Pienaar , A. J. 1962 . Eragrostis curvula (Pretoria strain) : Fertiliser experiment with superphosphate and ammonium sulphate , Pretoria : Agric. Research. Govt. Printer .
- Ramage , C. H. , Eby , C. , Mather , R. E. and Purvis , E. R. 1958 . Yield and chemical composition of grasses fertilised heavily with nitrogen. . Agron. J. , 50 : 59 – 62 .
- Theron , E. P. 1964 . Eragrostis curvula fertiliser experiment , Cedara : College of Agriculture . Unpublished progress report.
- Theron , J. J. 1955 . “ The recuperation of soils under grass pastures ” . In The grasses and pastures of South Africa , Edited by: Meredith , D. Cape Town : C.N.A. .
- Van Zyl , L. G. 1964 . Voergewasse vir die Drakensberg‐Weistreek , 16 – 19 . Staatsdrukker, Pretoria : Boeredag te Nooit‐gedacht .
- Visser , J. H. 1966 . Bemesling van die veld. . Proc. Grassld. Soc. of Sth. Afr. , 1 : 41 – 48 .
- Woldendorp , J. W. , Dilz , K. and Kolenbrander , G. J. 1966 . “ The late of fertiliser nitrogen on permanent grassland soils ” . In Nitrogen and grassland Edited by: van Burg , P. F. J. and Arnold , G. H. Wageningen