@ARTICLE {CARSKY:1998, title = {Maize yield determinants in farmer-managed trials in the Nigerian northern Guinea savanna}, author = {Carsky, R. and Nokoe, S. and Lagoke, S. * and Kim, S. K. *}, journal = {Experimental Agriculture}, year = {1998}, volume = {34}, number = {4}, pages = {407--422}, issn = {0014-4797}, }