Influence of Forward Speed and Tillage Depth on Draft of Primary Tillage Implements in Sandy Loam Soil（Extracts）

The availability of draft requirement data of tillage implement is an important factor in selecting suitable tillage implement for a particular farming situation.Implement width，operating depth，speed，soil condition and geometry of tillage implement are factors that affect the draft of tillage implement.Effect of different forward speeds（0.69，1.11 and 1.52 ms）and tillage depths（100，150 and 200 mm）on draft of two primary tillage implements were studied by using digital load cell in sandy loam soil.Implements included a three bottom disc plough and two bottom mouldboard plough.A significant increase in draft was observed for both implements with an increase in speed and depth.The draft exhibited greater influence from depth than speed for both implements.Mouldboard plough showed greater values of specific draft than disc plough for all ranges of forward speed and tillage depth.A general regression equation for the specific draft of both implements was developed based on speed and depth.