@ARTICLE {KIM:1997b, title = {Responses of tolerant and susceptible maize varieties to timimg and rate of nitrogen under Striga hermonthica infestation}, author = {Kim, S. K. and Adetimirin, V. *}, journal = {Agronomy Journal}, year = {1997}, volume = {89}, pages = {38--44}, issn = {0002-1962}, }