| 摘要 |
PROBLEM TO BE SOLVED: To provide a subsoiler working machine capable of a preventing much water from locally running into some specified slits and simple culverts, and as a result, improving the drainability of a field. SOLUTION: This subsoiler working machine has at least three knife beams 6, 21 and 22 with chisels 7, 24 and 25 at the under part, in parallel in the right and left direction of the working machine. The length of at least one of knife beams is formed so as to be different from those of the others so that the depths of dug spaces to be formed may be changed in the depths.
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