Effect of planting dates on the yield of three cultivars of bread wheat (Triticum aestivum L.)

In order to evaluate the performance of 3 promising cultivars under the identified optimal planting dates, a field experiment was carried out in the winter season of 2020–2021 in the fields of the Agricultural Research Department / Abu Ghraib. The purpose of the experiment was to examine the effects of 6 planting dates (25/10, 10/11, 25/10, 11/12, 25/12, 10/1) on the yield and its components of 3 approved wheat cultivars (Bohooth 10, Bohooth 22 and Bohooth 158). A Split Plot Design with 3 replications was used. Planting date D3 (November 25th) outperformed the other dates in most of the studied traits, with the highest weight of 1000 grains (39.14 g) and the highest grain yield (6.42 tons ha-1). While, cultivar Bohooth 22 outperformed the other cultivars in most of the studied traits, with the highest mean plant height (89.61 cm), spikelet's m-2 (281.4), weight of 1000 grains (33.73 g) and grain yield (5.02 tons ha-1). There were no significant differences between cultivars in the number of grains per spikelet trait. Cultivar Bohooth 22 at planting date November 25th outperformed the other combinations between cultivars and planting dates, with a grain yield of 8.03 tons ha-1.