@ARTICLE {ASADU:2000, title = {Impact of agroecology on soil fertility status and cassava yield in Nigeria: 1: nutrient levels in soils growing cassava}, author = {Asadu, C. * and Nweke, F. }, journal = {African Journal of Root and Tuber Crops}, year = {2000}, volume = {4}, number = {1}, pages = {14--19}, note = {RTB; Root and Tuber; Cassava}, }