| 摘要 |
This invention relates to an apparatus which can be connected to a tractor for preparation of the soil. The apparatus has at least two rows of toothed bars mounted on a frame, each row consisting of spaced apart pairs of bars, all of which are drawn behind the tractor at a right angle thereto. Sets of rods are attached to each of the toothed bars at one end and at their other ends the rods are attached to a related eccentric member. The eccentric members are rigid with a drive shaft journaled in the frame and having a free end connected to the power take-off means of the tractor. Upon rotation of the drive shaft, the toothed bars are displaced at different intervals laterally of the path of travel of the tractor to till the soil.
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