Fertilizers
nitrogen, phosphorus and potassium (N, P, K) were applied
at 120, 90 and 62.5 kg ha-1, respectively. The sources of
fertilizers were urea (46% N), DAP (di-ammonium
phosphate) (18% N, 46% P2O5) and SOP (sulfate of potash)
(50% K2O). All of the P and K and 1/2 of the N were
applied as a basal dos