effect of hill slope, tillage and seeding techniques on soil erosion, alimentary elements, organic material and wheat grain yield under rain fed condition

the erosion in dryland caused decrease in yield and soil quality, especially in slope land with conventional tillage. to investigate effect of tillage and planting methods in slope land on erosion and yield of dryland wheat, an experiment was conducted in 2007 at kermanshah province. the statistical design for this research was strip split plots in rcb (randomized complete blocks) with three replications. two slope levels (6-8 and 10-12 percent) arranged in main plots, three tillage systems (conventional, reduced and no tillage) three levels of planting methods (hand spreading, seeding by a drill parallel and perpendicular to slope) arranged in sub-plots. the results revealed run off was shown 12031.98 l/hafor 6-8 percent slope while on 10 -12 percent was 13680.21 l/ha. the signification (p<0.01) grain yield was produced (2850 kg/ha) where chisel and sweep ploughs were applied. no tillage system produced 2750 kg/ha grain yield but was not significantly different with others. 79.33 kg/ha of potassium was lost at 6-8 percent slope compared to 103.20 kg/ha for 10-12 percent respectively.