@ARTICLE {KANG:1981c, title = {Alley cropping maize (Zea mays L.) and Leucaena (Leucaena leucocephala Lam) in southern Nigeria}, author = {Kang, B. and Wilson, G. F. and Sipkens, L. E. }, journal = {Plant and Soil}, year = {1981}, volume = {62}, }