@INBOOK {KAMARA:2004, title = {Vertical root-pulling resistance in maize is related to nitrogen uptake and yield}, author = {Kamara, A. and Kling, J. and Ajala, S. and Menkir, A. }, editor = {Friese, D. K. and Palmer, A. }, year = {2004}, type = {Integrated approaches to higher maize productivity in the new millennium}, pages = {228--232}, publisher = {International Maize and Wheat Improvement Center (CIMMYT); Kenya Agricultural Research Institute (KARI)}, note = {Proceedings of the 7th Eastern and Southern Africa Regional Maize Conference, 5-11 February 2002, Nairobi, Kenya: International Maize and Wheat Improvement Center (CIMMYT) and Kenya Agricultural Research Institute (KARI)}, }