EFFECT OF SOIL FORCES ON THE SURFACE OF MOLDBOARD PLOW UNDER DIFFERENT WORKING CONDITIONS

摘要

The study was conducted to investigate the effect of forces on the surface of moldboard plow (model; ILE - 435) at three angles (65°, 75°, 90°), three depths (15cm, 20cm and 25 cm) and three moisture contents (21%, 24% and 27%) and variable on soilbin, while the forward speed of plow was kept constant (2 km/hr). In total 11 sensors were fixed on the surface of different parts of plow to measure draft forces applied on the surface of plow. Results revealed that the maximum force was observed at 90° angle, which decreased with the decreasing angles. It was also observed that varying angles have considerable effect on the width of cut. The maximum soil forces were exerted on the share of plow at all angles, while minimum force was observed on thecurvature of plow. The effect of different moisture content, working depths and rake angle were significant (P<0.01). It was also observed that moisture content has inverse relation with soil forces while depth has direct relation with soil forces.