| 摘要 |
PCT No. PCT/AU92/00525 Sec. 371 Date May 13, 1994 Sec. 102(e) Date May 13, 1994 PCT Filed Oct. 1, 1992 PCT Pub. No. WO93/06706 PCT Pub. Date Apr. 15, 1993.A seeder comprises a coulter assembly (13) operable to cut stubble/grass in a series of parallel lines in the first stage of forming a plurality of parallel rows of seed beds. The coulter assembly (13) comprises a plurality of coulters (21) and is operable to rotate the coulters (21) in a series of parallel circular paths around a central axis at a rate that is sufficient, relative to the forward direction of the seeder, so that the coulters (21) in each circular path make multiple cuts to the same section of ground surface in each parallel line.
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