Economic Yield and Sustainability of Maize Crop (Zea mays (L.) in Association with Cowpea (Vigna unguiculata (L.) Walp) and Egusi-melon (Citrullus lunatus (Thumb) mansf) in South Western Nigeria

F.N. Emuh

Journal of Agronomy 6 ( 1 ): 157 - 161 , 2007