Reversible plough/seed preparation device combination

An integrated combination of a reversible plough and a soil preparation device, said combination being intended to be mounted on a lifting device at the rear of a propelling vehicle, and to be capable of carrying out a combined ploughing and soil preparation action during a single pass across a field in either working position of the reversible plough, in which the combination comprises:

• a headstock;
• a carrying beam;
• a number of pairs of plough bodies arranged along the length of said carrying beam, said beam being capable of being rotated about a substantially horizontal pivot axis relative to the headstock in order to reverse the plough bodies at the end of each pass across a field prior to an adjacent return pass;
• a mounting block on which said carrying beam is mounted, said block being pivotally mounted on the headstock so as to be capable of pivoting with the carrying beam through approximately 180.degree. in order to reverse the plough bodies;
• a carrying arm having a forward end by which it is mounted on the combination and a rear end which is coupled with said soil preparation device in order to carry said device;
• a swivel mounting at said rear end of the carrying arm and on which said soil preparation device is mounted for rotation about a pivot axis provided by the swivel mounting, said carrying arm being movable with the carrying beam so that said soil preparation device can take up a co-operative working position with the plough bodies automatically when each reversal is completed;
• and
• a pivotable coupling which mounts said forward end of carrying arm and which allows the carrying arm to be adjusted independently of the carrying beam and the plough bodies, and about a first generally horizontal axis which extends transversely of the direction of travel, in order to adjust the height of the soil preparation device and about a second generally upwardly extending axis in order to carry out lateral adjustment of said device.