WHEAT VARIETIES PRODUCTION UNDER DIFFERENT IRRIGATION LEVELS UTILIZING AQUACROP MODEL IN SEMIARID CONDITION OF DUHOK –IRAQI KURDISTAN
This experiment was conducted at the research farm of the College of Agriculture, University of Duhok, Iraq Kurdistan Region season of 2015-2016. Irrigation treatments include (Rainfed, 50% and 100% of field capacity). with three broad wheat varieties (IPA-95, Abu-Graib and Sham-4) cultivated by application the (AquaCrop) model. Wheat varieties of IPA-95 and Abu-Graib-3 consistently resulted in higher yields than Sham-4 variety, the highest grain yield of 3.872 t. ha-1 was recorded by IPA-95 variety. Highest grain yield of 3.78 t.ha-1 was obtained from Total Field Capacity. The biomass varied from 12.162, 12.214 and 13.056, 11.591 and 11.211 to 11.866 t.ha-1 for measured and simulated values. Also the results indicated that the highest crop water productivity of grain yield was obtained by Abu-Graib-3 in both measured and simulated water productivity kg.m-3 which were (5.404 and5.767 kg.m3).