In a turnover plough provided with a jib for the connection of accessories which projects laterally from the plough frame in the working position and which has a position of rest near to the plough frame, the jib is transferred into the position of rest at the start of the lifting-out movement and is guided back into its working position again at the end of the lowering movement, for which purpose a jib arm is mounted either so as to be freely pivotable between two limitations defining the working position and the position of rest about an axis of articulation approximately vertical in the working position or can be moved about such an axis of articulation by means of a drive.
