1986 Volume 48 Issue 2 Pages 187-193
A powered rotary chisel is a rotary type subsoiler. Three factors favored this concept: (1) power can be directly transmitted more efficiently than through drawbar pull; (2)elimination of the draft of tillage tools reduces the need for heavily weighted wheels, thereby reducing soil compaction; and (3)elimination of draft allows tillage to be performed in difficult traction conditions.
The research reported in this paper was conducted to reduce more efficiently the power requirements of this system by introducing fluid under pressure from the tip of the chisel to break down soil layer. The fluid used in the injection will be sewage sludge but, since laboratory chisel tests were carried out in a soil bin, air was used in this study because it could be handled more easily than sewage sludge.
As a result, no matter which direction the blade was rotated, both chisel torque and draft force became approximately zero, and the soil surface was upheaved because of a cavity formed in the soil layer when pressurized air was introduced.
