@INBOOK {CARSKY:1992, title = {Fitting soil-improving legumes into inland valley rice-based cropping systems in West Africa}, author = {Carsky, R. and Ajayi, E. O. }, editor = {Mulongoy, K. and Gueye, M. * and Spencer, D. }, year = {1992}, type = {Biolgical nitrogen fixation and sustainability of tropical agriculture}, pages = {395}, chapter = {404}, publisher = {John Wiley & Sons; Sayce Publishing: International Institute of Tropical Agriculture (IITA); AABNF}, address = {Ibdan, Nigeria}, }