Response of Different Sweet Potato (Ipomoea batatas Lam) Cultivars to Different Levels of NPK 15:15:15 in Igbariam, Anambra State, Nigeria Evans E. Okoli1* and M.J. Nworji2 Abstract A research study on the response of different sweet potato cultivars to different levels of NPK 15:15:15 in Igbariam Anambra State, Nigeria was