@INBOOK {BATIONO:2002, title = {Soil fertility management and cowpea production in the semiarid tropics of West Africa}, author = {Bationo, A. * and Ntare, B. R. and Tarawali, S. and Tabo, R. }, editor = {Fatokun, C. and Tarawali, G. and Singh, B. and Kormawa, P. and Tamo, M. }, year = {2002}, type = {Challenges and opportunities for enhancing sustainable cowpea production: proceedings of the World Cowpea Conference III held at the International Institute of Tropical Agriculture (IITA), Ibadan, Nigeria. 4-8 september, 2000}, pages = {301--318}, }