Field Performance Evaluation of a New Tillage System

This study was conducted to evaluate the field performance of the new tillage machine in silty clay soil, which consists of two subsoiler plows, a rotary plow, and two opener furrows, and their effect on some mechanical and field indicators, which included: draft force, mean weight diameter and field efficiency. Three depths of plowing were used(30, 40, and 50 cm), two rotational speeds for the rotary plow blades are(250 and 300 rpm), and three distances between two plates of the two opener furrows are(35, 40 and 45 cm). The results showed an increase in the draft force with an increase in the plowing depth from 30 to 50 cm, a decrease in the rotational speed of the rotary plow from 300 to 250 rpm, and an increase in the distance between two plates of the two opener furrows from 30 to 40 cm. The mean weight diameter was decreased when using shallow plowing with a depth of 30 cm compared to deeper plowing with a depth of 50 cm and with an increase in the rotational speed of the rotary plow blades from 250 to 300 rpm. As for field efficiency, the highest average was recorded for shallow plowing at a depth of 30 cm, a high rotational speed of 300 rpm, and the small distance between two plates of the two opener furrows of 35 cm was 73.28, 69.12, and 68.39%, respectively. Keywords: Plowing depth, Rotational speed, Mean weight diameter, Draft force, Field efficiency