Field experiment was conducted at Ismailia Agricultural Research Station during 2010/2011 season. The current study aimse to maximizing the degree of utilization of available water resources by using some of natural improvers or synthetic-organic polymer (carboxy methel cellulose-CMC). Also use irrigation regimes with 100, 75 and 50% of the available soil water (ASW). Under sprinkler irrigation system in the sandy soil to study the effect of grown crop as a winter wheat plant (Giza 168 c.v.). Characters studies , yield (plant highsspike no./m 2-1000 grain weightbiological yield-grain yield-straw yield), yield component (harvest Indexgrain proteintotal carbohydrate), chemical components (grain N ,P and K uptake kg/fed) and water relation (season evapotranspirationwater use efficiency). The results obtained indicated that the applied organic polymer and irrigation regime with 100% ASW showed significant increases in plant characters followed by irrigation regime at 75% ASW. The lowest values obtained were without applied organic polymer and irrigation regime at 50% ASW. Results indicated the effect of irrigation regime on seasonal evapotranspiration rate by wheat plant where total ET varied from 1651.3, 1238.5 and 825.6 m3 /season for irrigation water regime under 100, 75 and 50% ASW, respectively. The obtained results demonstrated that application of organic polymer had significant effects on WUE. The values was 0.880 kg/m 3 while the lowest value was 0.791 kg/m 3 without application organic polymer. Also the results showed that 50% ASW produced highest WUE (1.048 kg/m 3) followed by irrigation water regime at 75% ASW (0.812 kg/m 3) while the lowest value was obtained by irrigation water regime at 100 % ASW (0.718 kg/m 3).
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