Prediction of Single Disc Seeding System Forces, Using a Semi-Analytical and Discrete Element Method (DEM)

There is a rising interest amongst Australian farmers to use disc seeders due their ability operate in high residue conditions and at higher speeds, commonly the range of 12 15 km h−1. This paper reports on developing an analytical discrete element method (DEM) force prediction model suited rotating flat blade operating different sweep tilt angles. To validate models, field experiments were carried out with two angles 0 20° four 6, 26, 45 90° sandy soil. An approach was developed following experimental investigation that showed only forward portion actively involved generating soil failure, while magnitude this active soil-disc interface varied angle. The predicted proportions correlated well observations. As applying affects direction movement relative face, directions friction resultant forces determined. equation acceleration adapted account for Results fits relatively measured data 90, 26° angle, low correlation between 6° angle scrubbing reaction not accounted model. also better coefficient determination (R2 = 0.93) obtained DEM vs. test results compared predictions 0.86), particularly predicting side forces. It found from study both enabled acting blade, which can assist optimising design lower specific resistance.