References
- Bornman , J.J. 1993 . Overliming effects on maize and wheat in glasshouse trials , Pretoria , , South Africa : University of Pretoria . PhD thesis
- Bornman , J.J. , Coetzee , J.E.K. and van Vuuren , J.A.J. 1988 . Inter‐laboratory study with regard to the variability of three aglime analysis methods, including a resin suspension method . Commun. Soil Sci. Plant Anal. , 19 (3) : 299 – 310 .
- Fölscher , W.J. and Bornman , J.J. 1984 . Suspension method for the evaluation of agricultural lime . S. Afr. J. Plant Soil , 2 : 45 – 51 . (paper in Afrikaans language)
- Horwitz , W.H. 1980 . Official Methods of Analysis of the Association of Official Analytical Chemists. , 13th edn. , Washington D.C. , , U.C. : A.O.A.C. .
- Jenny , H. and Overstreet , R. 1938 . Contact effects between plant roots and soil colloids . Proc. Nat. Acadamy Sci. Washington , 24 : 384 – 392 .
- South African Government Gazette. 1977. No 5552 of May 1977. Volume 143. Article 2468. Government Press. Pretoria
- Sumner , M.E. 1993 . “ Gypsum and acid soils: The world scene ” . In Advances in Agronomy , Edited by: Sparks , D.L. Volume 4 , 1 – 27 . New York , NY : Academic Press .
- Warfvinge , P. and Sverdrup , H. 1989 . Modeling limestone dissolution in soils . Soil Sci. Soc. Am. J. , 53 : 44 – 51 .