Nitrogen nutrition of cowpea (Vigna unguiculata (L.) Walp.) and its relationship to-soil fertility
1978
Balasubramanian, V., Institute/or Agricultural Research, P.MB./044, Zaria, Nigeria | Annadi, L. A., nstitute/or Agricultural Research, P.MB./044, Zaria, Nigeria
The fertility restorative ability of cowpea is critically reviewed with regard to the nature of the crop, excretion of fixed N by intact plants, distribution of fixed N in various plant parts, and factors affecting efficiency of N fixation. Areas for future research are indicated and suggestions to improve N fixing efficiency of cowpeas are included.
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