Genotype effects of cowpea and soybean on nodulation, N2-fixation and N-balance in the Northern Guinea Savanna of Nigeria by Yusuf, A. A., Abaidoo, R. C., Iwuafor, E.N.O., Olufajo, O. O.

“…An article published by Journal of Agronomy 7(3): 258-264, 2008…”
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