On-farm evaluation of improved cowpea-cereals cropping systems for crop-livestock farmers: Cereals-cowpea systems in Sudan savanna zone of Nigeria
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Ajeigbe, Hakeem A; Singh, Bir B; Ezeaku, Innocent E; Adeosun, James O (2010). On-farm evaluation of improved cowpea-cereals cropping systems for crop-livestock farmers: Cereals-cowpea systems in Sudan savanna zone of Nigeria. African Journal of Agricultural Research. Available electronically from https : / /hdl .handle .net /1969 .1 /179260.