Response of four improved cassava genotypes to nitrogen, phosphorous and potassium fertilizer types and rates in Southwestern Nigeria - Oketade, E.I.; Akoroda, M.O.; Parkes, Elizabeth Y.; Aina, O.O.; Hauser, S.; Iluebbey, Peter O.; Adetoro, N.A.; Bello, A.A.; Agbona, A.; Kulakow, Peter A. (World Congress on Root and Tuber Crops, 2016)