Experimental plots were irrigated by a sprinkler irrigation system at the beginning for a uniform plant establishment. Irrigation was carried out two times during this stage. After the emergence of maize seedlings, irrigations were performed by drip irrigation to irrigate a soil profile of 0–90 cm to field capacity. Subsequent irrigations were applied according to the prescribed irrigation rates with 7 day intervals. In present study, irrigation treatments were arranged according to five different deficit rates (Kn) of available soil water as follows: