Abstract

A field experiment was carried out at the Farm of Nasser's Faculty of Agricultural Sciences which located in Delta of Tuben, during 2011/2012 and 2012/2013 seasons, to evaluate three maize cultivars (Tehama-1, Taiz-2 and local one) in three planting dates (November 4^th, December 4^th and January 4^th). The results of the combined analysis of the two seasons showed that the delay of planting, date from November 4^th to December 4^th and January 4^th significantly reduced the number of days to 50% tassling and silking, plant height, ear height, leaf area of topmost ear, leaf area index, ear length, number of grains/ row, 100-grain weight, grain weight/ear, and grain yield/ hectare and this reduction ingrain yield was 10.96 and 21.31% in the second and the third planting dates compared with the first one, respectively. Cultivars had significant differences in all of the characters under study except ear diameter with the superiority of Taiz-2 and Tehama-1 over the local on by 28.14 and 25.46% in grain yield, respectively. The interaction between planting dates and cultivars significantly affected plant height and leaf area of topmost ear as well as grain yield and its components ear length, number of grain/ row and ear grain weight. Highly significant positive correlations were found between grain yield and previous yield components.