@MANUAL {AJEIGBE:2010g, title = {Farmers' guide to increased productivity of improved legume-cereal cropping systems in the savannas of Nigeria}, author = {Ajeigbe, H. and Mohammed, S. * and Adeosun, J. O. * and Ihedioha, D. O. }, year = {2010}, note = {Cowpea; Cowpea Agronomy; Learning Material; 978-978-49796-1-0; 105p.}, }