Effect of tillage implements on yield of winter wheat.

A two-year study was conducted to investigate the effects of different soil tillage implements and operating speeds on yield of winter wheat in loam soil under Erzurum conditions. The compared tillage implements were: moldboard plow (KP), slatted moldboard plow (IP), disk plow (DP), chisel plow (CP) and primary tillage + rotary harrow systems mounted in back of this primary tillage, composed of KPT, IPT, DPT, and CPT. The operating speeds used for each tillage implement were 1.25, 1.50 and 1.75 m/s. In the experiment, effect of the tillage implements and the operating speeds on plant height, ear height, number of ears per m, number of grains per ear, thousand-kernel weight, and grain yield was determined. The first year, there were significant differences between the tillage implements, and the operating speeds for values of plant height, ear height, thousand-kernel weight, and grain yield. In the second year, there were significant differences between the tillage implements, and the operating speeds for values of ear height, number of grains per ear, thousand-kernel weight, and grain yield. While the highest values occurred with IPT, the lowest values occurred with CP. It was observed that rotary harrow increased yields with all tillage implements. The highest yields was obtained at operating speed of 1.50 m/s