@ARTICLE {AJEIGBE:2006a, title = {Effect of planting pattern, crop variety and insecticide on the productivity of cowpea-cereal systems in Northern Guinea Savanna of Nigeria}, author = {Ajeigbe, H. and Oseni, T. and Singh, B. }, journal = {Journal of Food, Agriculture and Environment}, year = {2006}, volume = {4}, number = {1}, pages = {145--150}, issn = {1459-0255}, }