RESPONSE OF GROWTH AND YIELD OF BREAD WHEAT TO IRRIGATION AND NITROGEN FIRTILIZER

Abstract

A field experiment was conducted in mixed clay textured soil during winter season of 2010 in Anbar Governorate that was to study the requirement of irrigation and the best level of nitrogen fertilizer to cultivars IPA 99 and Abu Ghraib -3 under the Anbar conditions. A Randomized Complete Block Design in split – split plot arrangement with three replicates was applied . Result showed that The cultivar IPA99 gave a highest plant height 62.64 cm and flag leaf area 55.51cm2. Cultivar Abu Ghraib -3 gave high grains yield 5.15tan.ha-1.The five irrigations in season gave highest rate in plant height82.68cm and flag leaf area 56.23cm2 and high grains yield 5.18 tan.ha-1.The level 250 KgN.ha-1 gave the highest plant height 83.0 cm , flag leaf area 55.95cm2, number of spikes 337 spike/ m2.and grains yield 5.12 tan.ha-1.The interaction between cultivars Abu Ghraib and level 250 KgN.ha-1 had significant effect on grains yield 5.32 tan.ha-1.While the interaction between cultivars Abu Ghraib and five irrigations and level 250 KgN.ha-1 had significant effect on grains yield and gave 5.63 tan.ha-1.