Evaluation of Yield Stability of Maize (Zea mays L.) Influenced by Planting Date in Moghan Region

The effects of planting date on seed yield and its components of maize hybrids evaluated in factorial experiment based on complete randomized block design with four replications during two growing seasons in Moghan Research Station. Treatments consisted of two planting dates (1 May and 25 June) and five maize hybrids, namely SC704 and SC720 from a late maturing group, TWC600 and SC647 from mid maturing group and SC301 from early maturing group. Results showed that 1 May planting date at two growing seasons had higher yield and its components of maize. SC704 had high grain yield at 1 May planting date. Therefore, this planting date could be recommended for Moghan region. A significant correlation indicated a strong positive relationship between grain yield and number of grains per ear.