Influence of poultry manure and inorganic nitrogen fertilizer on grain yield and proximate component of two cultivars of cowpea (Vigna unguiculata (L.) Walps) · Peerford
Article · Journal · 2004
Influence of poultry manure and inorganic nitrogen fertilizer on grain yield and proximate component of two cultivars of cowpea (Vigna unguiculata (L.) Walps)