PROBLEM TO BE SOLVED: To provide a farm implement equipped with an implement such as a plow 12 prevented from descending in no time.SOLUTION: The tractor is equipped with an automatically plowing-controlling function for outputting hydraulic fluid for a lift cylinder 17 to a lowering side of a lift arm 19 at the maximum flow rate when an implement-lifting and lowering switch 23 is kept in a state of being pushed to the lowering side, and a controller 50 having a controlling structure for prohibiting the automatic plowing control when a car speed detected by a car speed sensor 24 and not lower than a prescribed car speed is not detected. As a result, at the time when the automatic plowing control is not necessary including the time or the like for attaching and detaching the implement, the risk such as the one of breaking the implement and asphalt by the rapid lowering of the lift arm 19 is avoided even if wrong operation is carried out.COPYRIGHT: (C)2013,JPO&INPIT【課題】一気にプラウ12などの作業機が降下することを防いだ作業機を装着した農作業機を提供すること。【解決手段】作業機昇降スイッチ23を下げ側に押し続けると、リフトシリンダ17の作動油が最大流量でリフトアーム19を下げ側に出力する自動すき込み制御機能を備え、車速センサ24により検知される所定の車速以上の車速が検出されない場合は、前記自動すき込み制御を禁止する制御構成を有する制御装置50を備えたトラクタであるので、作業機着脱時などを含めて前記自動すき込み制御が不要な場合に、この制御機能を働かせないので、誤操作しても急にリフトアーム19が下降して作業機やアスファルトを壊してしまうなどの恐れがなくなる。【選択図】図1
