@INBOOK {OKIKE:2002, title = {An evaluation of potential adoption and diffusion of improved cowpea in the dry savannas of Nigeria: a combination of participatory and structured approaches}, author = {Okike, I. and Kristjanson, P. and Tarawali, S. and Singh, B. and Kruska, R. and Manyong, V. }, year = {2002}, type = {Challenges and opportunities for enhancing sustainable cowpea production:}, pages = {387--406}, note = {Proceedings of the World Cowpea Conference III held at the International Institute of Tropical Agriculture (IITA), Ibadan, Nigeria, 4-8 September 2000}, }