The effect of the lateral distance between the shallow tines of the subsoiler on its draft requirement in a silty clay soil

A subsoiler of single tine was designed and provided with two shallow tines fixed in front of it. The shallow tines lateral distance between them can be changed. The leg of the subsoiler was provided with foot and the foot was provided with wings at one stage of the experiments. The subsoiler was tested in silty clay soil using four operating depths 30, 40, 50 and 60cm. Three lateral distances were used between the shallow tines 40 , 50, and 60 cm. Wings were also used at one stage of the experiments. The subsoiler combinations are S, S+sh40, S+sh50 and S+sh60. The draft force of the subsoiler combinations increased as the operating depth increased. The increase was between 15.82 to 17.88kN for four subsoiler combinations when the operating depth increased from 30 to 60cm. The draft force requirement of each centimeter of depth on average is 0.560kN. Using shallow tines with subsoiler increased the draft force requirement and it increased with lateral distance between the shallow tines. The draft force requirement with shallow tines increased as the operating depth increased. The draft force requirement of each centimeter of shallow tines lateral distance for the shallow tines (30cm) is 0.062kN it increased to 0.091kN (91N=9.3kg). Providing the subsoiler with wings increased its draft requirement especially at greater depths. The highest draft requirement was recorded to deeper operating depth (60cm), wider lateral distance (60cm) and with wings on the foot of the subsoiler.