@ARTICLE {KAMARA:2006a, title = {Response to low soil nitrogen stress of S1 maize breeding lines selected for high vertical root-pulling resistance}, author = {Kamara, A. and Menkir, A. and Kureh, I. * and Omoigui, L. }, journal = {Maydica}, year = {2006}, volume = {51}, number = {3-4}, pages = {425--433}, issn = {0025-6153}, }