Effects of Planting Date and Pattern on Yield of Maize Hybrid KSC 700 in Islamabad Moderate Region of Kermanshah Province

A field experiment was conducted to study the effects of planting date and pattern on grain yield of new corn hybrid (KSC 700) in Islamabad Agricultural Research Station for two years (2004-05). A randomized complete block design in split split plot arrangement with three replications was used in this study. Three planting dates (25 April 5 May and 15 May), three row distances (55, 65 and 75 cm) and three plant densities ( 65000, 75000 and 85000 plants/ha) were assigned to main plots, subplots and sub-subplots, respectively. The results showed that the best planting dates were 25 April and 5 May and the best row spacing was 65cm. Grain yield of 65 cm treatment was higher than those of the other row distances (55 and 75 cm). The best plant density was 75000 plants/ha. The highest grain yields were obtained in treatment combinations of 65 cm row spacing and 75000 plants/ha with 13388 and 12838 tha-1, in planting dates 25 April and 5 May, respectively. Therefore, planting of late maturing hybrids in early May with 70000-75000 plants/ha in 65 cm row spacing can be recommended for moderate regions of Kermanshah province.