evaluation and comparison of different tillage methods in improvement of salt-affected soils in wheat production

one of the main strategy for controlling salt-affected soils is to implement proper tillage method. a field experiments was conducted to determine the effect of different tillage methods on salt distribution and wheat yield in saline-sodic soil. the experiment was laid out according to randomized complete block design with three replications. treatments were studied in the experiment including conventional tillage (t1), reduced tillage (t2), subsoiling+ conventional tillage (t3), subsoiling+reduced tillage (t4), subsoiling+power harrow (t5) and plowing without moldboard (t6). electrical conductivity (ec) ph of the soil sodium adsorption ratio (sar) and cone index (ci) were measured for all treatments. the results showed that the t3 and t4 treatments compared to t1, caused a significant salinity reduction by 17.8 and 10.3%, respectively. the sar was influenced by different tillage systems. the maximum sar was observed for t1 system and t2 relative to t1 system reduced sar by 4.1%. the results also revealed that sar in t3 system was significantly less than t1 (23.4%) and t2 (20.1%) systems. different tillage systems had significant effects on wheat yield.