@INBOOK {KANG:1992, title = {Nitrogen contribution of woody legumes in alley cropping systems}, author = {Kang, B. and Mulongoy, K. }, editor = {Mulongoy, K. and Gueye, M. * and Spencer, D. }, year = {1992}, type = {Biological nitrogen fixation and sustainability of tropical agriculture}, pages = {367--375}, publisher = {John Willey & Sons; Sayce Publishing; international institute of Tropical Agricultue (IITA); AABNF}, address = {Ibadan, Nigeria}, }