Abstract
The power requirement of tillage was measured by using the small tractor attached the drawn tillage tool at the rear-side of rotary tilling device, and sometime varying depth of tool and tine respectively.
The characteristics of the combination tillage were summarized as follows;
(1) The tilling pitch in case of the combination tillage decreased as the travel speed of the tractor decreased with an increase of the draft resistance of the drawn tillage tool.
(2) Therefore, the torque of rotor shaft of the combination tillage was 0.75-0.85 times as large as that in case of the rotary tillage.
(3) In the combination tillage, the power of driving shaft increased with an increase of the dnaft resistance of the drawn tillage tool, while the power of rotor shaft decreased with an decrease due to the tilling pitch. Therefore, the total power consumption in the combination tillage was 0.9-0.95 times as large as that in case of the rotary tillage.
(4) The combination tillage was superior on the specific work done.
