PROBLEM TO BE SOLVED: To provide a rough plowing implement which can reduce such the movement of soil in a field as when a rough plowing work is performed with a conventional rough plowing implement, and can simultaneously eliminate the clogging and adhesion of the soil to the implement and improve the efficiency of the work.SOLUTION: The rough plowing implement is characterized in that: a digging, inverting, throwing portion having a new curve and made from a less abrasive material to eliminate the adhesion of soil than that of a conventional digging, inverting, throwing portion is disposed inverted and thrown soil is moved into the implement the shape is compacted to more reduce the movement of the soil than that of a conventional rough plowing implement and the clogging of the implement with soil is eliminated to reduce the sequent various works such as a land-grading work to improve the efficiency of the work.COPYRIGHT: (C)2010,JPO&INPIT【課題】従来の粗耕起作業機を用いて粗耕起作業を行う場合における圃場の土の移動を軽減すると同時に、作業機への土の詰まり、土の付着を解消し、作業効率の向上を図る。【解決手段】粗耕起作業機において、装備した掘削反転放擲部を従来のものと比べて、摩擦減少材を用いて、土の付着をなくし、また新たな曲面で構成した掘削反転放擲部を備え、反転放擲された土を作業機内に移動させ、形状をよりコンパクトにし、従来の粗耕起作業機より土の移動を少なくし、土の詰まりをなくしてその後の整地作業等の諸作業を軽減して作業効率を向上させるものである。【選択図】 図1