مقاومت كششي و ميزان برگردان خاك توسط گاوآهن برگردان دار در شرايط مختلف سرعت پيشروي و عمق شخم

Evaluation of draft requirement and soil inversion of moldboard plow at different levels of speed and plowing depth

Soil tillage of irrigated fields is usually being performed by moldboard plow. In this study the effect of different speeds and plowing depths on the performance of moldboard plow was evaluated. The soil was silty clay with 14%-l6% moisture content. The performance parameters studied were draft, specific draft, drawbar power, and soil inversion. A randomized complete block design was used for statistical analysis of data. 9 treatments representing different levels of speed and plowing depth were replicated 3 times. It was found that draft, specific draft. and drawbar power, increased as the forward speed and plowing depth increased. It was also found that the increase of forward speed and depth of plowing improved the quality and quantity of soil inversion. It is recommended that plowing speed for an economical seedbed preparation should be 3.5-4.5 Km/h. Since power requirement was directly proportional to the plowing depth, from economical standpoint, it is recommended that plowing depth should be determined on the basis of crop root requirement, for those crops with shallow roots a shallow plowing may be sufficient.