@INBOOK {BATEN:1992, title = {An exploratory survey of soybean production in Ayepe, Nigeria}, author = {Baten, M. A. and Agboola, A. A. and Mutsaers, H. J. W. }, editor = {Mulongoy, K. and Gueye, M. * and Spencer, D. }, year = {1992}, type = {Biological nitrogen fixation and sustainability of tropical agriculture}, pages = {333--342}, publisher = {John Wiley; Sayce; International Institute of Tropical Agriculture (IITA); AABNF}, address = {Ibadan, Nigeria}, }