Effects of some physical and chemical characteristics of soil on productivity and yield of cowpea (Vigna unguiculata L. Walp.) in coastal region (Cameroon)
Ndema Nsombo Eugène1, Etame Jacques1, Taffouo Victor Désiré2* and Bilong Paul1
1Department of Earth Science, Faculty of Science, University of Douala, P.O. BOX 24157 Douala, Cameroon.
2Department of Botany, Faculty of Science, University of Douala, P.O. BOX 24157 Douala, Cameroon.
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