@ARTICLE {YAMOAH:1986c, title = {Nutrient contribution and maize performance in alley cropping systems}, author = {Yamoah, C. F. and Agboola, A. A. and Wilson, G. F. }, journal = {Agroforestry Systems}, year = {1986}, volume = {4}, number = {3}, pages = {247--254}, issn = {0167-4366}, }