Problem to be solved: to improve the crushing property of the tillage nail and to improve the amount of the pawls around the soil, to work quickly, and to reduce the overlapping work at the same place.Solution 1 is a tilled pawls 1 for rotating and cultivating the soil, having a plate-like vertical blade part 3 extending from the base part 2, a lateral blade part 4 which is bent by one side inclined from the longitudinal blade part 3, and an orthogonal blade part 5 made up of a plane extending from one side edge part to one side The longitudinal edge of the longitudinal blade 3, the transverse blade 4 and the transverse blade 4 and the orthogonal blade part 5 are substantially curved from the longitudinal blade 3 to the transverse blade 4 in the direction opposite to the rotational direction, and from the longitudinal blade part 3 to the transverse blade 4 and the orthogonal blade part 5, and the boundary line of the longitudinal blade part 3, the transverse blade part 4 and the orthogonal blade part ParallelIn the case of the straight line passing through the center of the base 2 perpendicular to the axis of rotation of the tilling claw shaft, it is inclined by the tilled pawls inclined to the rear side in the rotational direction from 12 to 22 degrees.Diagram【課題】耕耘爪の砕土性を向上するとともに、耕耘爪が土を持回る量を向上し、早く作業をすることを可能とし、同一箇所での重複作業を軽減する。【解決手段】回転させ土壌を耕耘する耕耘爪1であって、基部2から延びる平板状の縦刃部3と、縦刃部3から一側方に傾斜して曲げられて延びる横刃部4と、横刃部4から一側方に延びる平面からなる直交刃部5とを有し、縦刃部3から横刃部4にかけて回転方向と逆向きに湾曲されているとともに、縦刃部3から横刃部4及び直交刃部5にかけての回転方向前側に刃部を有し、縦刃部3と横刃部4及び横刃部4と直交刃部5の境界線は略平行であり、耕耘爪軸の回転軸線と直交する基部2の中心を通る直線に対し、回転方向後方側に向けて12度乃至22度角に傾斜している耕耘爪による。【選択図】 図1
