Abstract

     A field experiment was carried out in the educational farm of Nasser’s Faculty of Agricultural Sciences, University of Aden (Delta Tuban) Lahej Governorate, Republic of Yemen, during two seasons 2017/2018 and 2018/2019, to study the effect of three sowing dates (6/11, 6/12 and 6/1) and three plant densities (56, 67 and 83 thousand plant/Ha) on the yield and its components of maize. The experiment was performed in split-plot design with three replications.The results could be summarized as that the first sowing date (6 November) significantly surpassed was higher in all yield characteristics and components, compared to the late sowing date (6 January) in both seasons.
The low density gave the highest values ​​of the yield components studied, except shelling percentage in grain. High density gave the highest values ​​in cereal yield. The interaction between sowing dates and density significantly affected all the studied traits. The low density gave the highest values ​​with the first date in the length and diameter of the ear, number of rows/ear, number of grain/ear and 100 grain weight for the two seasons. The high density with the first date achieved the highest values ​​in the shelling percentage and grain yield in both seasons.