The Influence of Implements and Operational Parameters on draught and Soil Disturbance of Model Tillage Tools

Abstract

Information and relevant data are scarce on soil bin experimentations and the design of soil engaging implements in Nigeria. In this study, three different model tillage tines designated T1, T5 and T20 (1, 5, and 20 cm wide respectively) were tested under indoor soil bin conditions. The effects of tool dimensions, forward speed and rake angle on draught force and soil disturbance were studied and evaluated. It was observed that draught increased with an increasing rate with the width of tine. The increase was also affected by the forward speed. Draught force varied quadratically with forward speed and similarly with rake angle. The relationship was developed from multiple regression analysis with coefficient of determination ranging from 0.964 to 0.995. Graphical representations of the relationships are also presented for the treatments considered. Values of specific draught are also reported. Soil disturbance patterns were observed, evaluated and analyzed. Some parameters of soil disturbance increased with increase in tine width and speed, others decreased. Measured values were reported of rupture distance (f), soil throw (TDW), maximum width of soil cut (Wfs), ridge-to-ridge distance (RRD), height of ridge (hr), and after plough depth (df). The study provided relevant data in the design of soil engaging implements.