| 摘要 |
A conservation tillage tool including a frame disposed to support a number of soil working implements in sequence. The frame is supported by ground wheels attached to the rear section of the frame. The wheels are movable with respect to the rear section of the frame to move the frame between a raised transport position and a number of lowered working positions. A hitch attached to a tractor supports the front section of the frame, and a pivotally attached tongue interconnects the front section and the hitch. A leveling mechanism interconnects the rear section, the front section and the pivotally attached tongue. The leveling mechanism is a four-bar linkage that applies a force at the pivotal connection of the tongue to the front section as the wheels move to raise or lower the rear section thereby maintaining the frame substantially level with respect to the ground.
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