The plough (1) has a forecarriage (2) i.e. front part, connected to a hitching system (4) i.e. three-point linkage system, of a tractor (5). A rear-carriage (3) comprises a frame (6) equipped a ploughing body (7) and a regulating wheel (8). The wheel is mounted on the frame using a wheel arm (9) that includes a displacement unit for displacing the wheel along the frame. The wheel moves from a normal working position to a non-extended working position and inversely by pivoting around one of additional articulations (15). The arm is composed of connecting rods (13, 14).
