study methods of tillage in volume of water and yield for wheat production method in khuzestan

since wheat-rice cropping system is down in about 50000 hectare of khoozestan province and also necessity of optimum land and water utilization, this study was condulted during one year (2008-2009) in shawoor agricultural research station to compare different conservation tillage system with traditional system for wheat cultivation in paddy residue. experiment conducted in randomized complete block design in three replication. the plots were tillage methods including: a) plough + disc + leveler, b) chisel + disc, c) rotivator + disc, d) two pass of disc harrow. the evaluated factors were water progress and regress rate in soil, yield and yield component. the results showed tillage methods and residue were not of meaningful effect on yield and yield components but tillage methods were of meaningful effect soil break up, water progress and regress rate in soil. finally tillage methods of two pass of disc harrow suggest for conservation tillage, with 4674 kg per hectare grain yield, 14% reduction in irrigation time of compared to other methods, is recommended.