PROBLEM TO BE SOLVED: To decrease the risk of generating and for pushing aside and generating a large amount of soil push and mudflow caused by the end of a land leveling rotor working near planted seedlings or sown field.SOLUTION: The land leveling rotor 53 consists of an end rotor part 53B located on an end side in a horizontal direction and a central rotor part 53A located on a central side in the horizontal direction. The end rotor part 53B of the land leveling rotor is configured to be able to switch to a free rotary state where it can rotate at lower speed than the driving speed of the central rotor part 53A, or to an earth-based state distant from a paddy field surface.COPYRIGHT: (C)2013,JPO&INPIT【課題】既植苗の存在箇所や既播種位置に近い側における整地用ロータの端部で、多量の泥押しや泥波が発生する可能性を低減させる。【解決手段】左右方向での端部側に位置する端部ロータ部分53Bと、左右方向での中央側に位置する中央部ロータ部分53Aとを備えて構成された整地用ロータ53の端部ロータ部分53Bを、中央部ロータ部分53Aの駆動速度よりも低速での回転が可能な自由回転状態、または田面から離れた非整地状態に切換可能に構成してある。【選択図】図4
