@ARTICLE {OKOGUN:2005, title = {On-farm evaluation of biological nitrogen fixation potential and grain yield of Lablab and two soybean varieties in the northern Guinea savanna of Nigeria}, author = {Okogun, J. and Sanginga, P. and Abaidoo, R. and Dashiell, K. and Diels, J. }, journal = {Nutrient Cycling in Agroecosystems}, year = {2005}, volume = {73}, number = {2-3}, pages = {267--275}, issn = {1385-1314}, }