@ARTICLE {IBEWIRO:2000c, title = {Evaluation of symbiotic dinitrogen inputs of herbaceous legumes into tropical cover-crop systems}, author = {Ibewiro, B. and Sanginga, P. and Vanlauwe, B. and Merckx, R. }, journal = {Biology and Fertility of Soils}, year = {2000}, volume = {32}, pages = {234--242}, }