| 摘要 |
An earthworking implement (10) comprises a pair of rotatable spaced-apart discs (11, 12) which are orientated so as to be divergent in both the direction of travel and the upward direction. The discs (11, 12) are mounted on respective stub axles (13, 14) which, in turn, are mounted to spring-biased arms (18, 19). The discs (11, 12) are inserted in the soil and moved along the ground to cut a wedge of soil (26) and to lift the wedge (26) relative to the surrounding soil. As the wedge section (26) is separated from the surrounding soil as a result of tensile failure of the soil, the implement uses less energy in this operation. Moreover, there is minimal disruption to the surface layer of the soil. The implement can also be used to deliver seeds, fertiliser, or other materials into the grooves cut in the soil by the discs (11, 12).
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