@INBOOK {SANGINGA:1990c, title = {Effect of successive cuttings on nodulation and nitrogen fixation of Leucaena leucocephala using 15N dilution and the difference methods}, author = {Sanginga, N. and Zapata, F. and Danso, S. K. A. * and Bowen, G. D. }, year = {1990}, type = {Plant nutrition-physiology and applications, edited by M.S. van Beusichem}, pages = {667--674}, publisher = {Kluwer Academic Publishers}, address = {The Netherlands}, }