@ARTICLE {ASADU:2005, title = {Soil nutrient and cassava yield variations under continuous cultivation of three crop mixtures in south-eastern Nigeria}, author = {Asadu, C. * and Dixon, A. }, journal = {Tropical Agriculture}, year = {2005}, volume = {82}, number = {1}, pages = {1--7}, note = {RTB; Root and Tuber; Cassava}, }