Abstract Development of models for prediction draft requirements of disk plough contribute
in improving their performance in the field. In this study, a mathematical models was
developed to predict draft force requirements of disk plough under various field conditions.
Field experiments were carried out at two levels of moisture content (8 and 21)%, two levels
of cone index (550 and 980) kPa, three levels of tillage depth (15, 20 and 25) cm and three
levels of forward speed (0.54, 0.83 and 1.54) m/sec in a silty clay soil. A stepwise regression …