N-use efficiency of single, double and synthetic maize lines grown at four N levels in three ecological zones of West Africa

Author: Akintoye H.A.   Kling J.G.   Lucas E.O.  

Publisher: Elsevier

ISSN: 0378-4290

Source: Field Crops Research, Vol.60, Iss.3, 1999-02, pp. : 189-199

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Abstract