Trends in maize grain yields in a long-term fertilizer trial

Author: Nel P.C.   Barnard R.O.   Steynberg R.E.   de Beer J.M.   Groeneveld H.T.  

Publisher: Elsevier

ISSN: 0378-4290

Source: Field Crops Research, Vol.47, Iss.1, 1996-07, pp. : 53-64

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Abstract