@INBOOK {YAMOAH: C.F., title = {Comparative study on the growth and productivity of Sesbania and leucaena in the Central Plateau region,Rewanda}, author = {Yamoah, C. F. and Eylands, V. J. and Akyeampong, E. }, year = {1992}, type = {Biologicaal nitrogen fixation and sustainability of tropical agriculture, edited by K. Mulongoy, M. Gueye, and D.S.C. Spencer . John Wiley & Sons/Sayce Publishing}, pages = {179--186}, }