@ARTICLE {GUNGULA:2003, title = {CERES-maize predictions of maize phenology under nitrogen-stressed conditions in Nigeria}, author = {Gungula, D. T. * and Kling, J. and Togun, A. *}, journal = {Agronomy Journal}, year = {2003}, volume = {95}, pages = {892--899}, issn = {0002-1962}, }