Rotary cultivator with ground bar to resist advance - and carried by rearward extending arm of adjustable length

The rotary cultivator comprises an arm (8) extending to the rear of the cultivator, and carrying a ground-engaging bar (6) for resisting the advance of the cultivator, the arm being connected to the cultivator by a yoke (7) permitting selection of the rearward extent of the arm. The arm (8) is secured to the yoke (7) by a removable spindle (9), so that the arm is held in either a rearward or a laterally-extending position. The arm is held in both positions by abutment with the yoke. The arm may be held in the lateral position by abutment with a second spindle removably inserted into an aperture in the yoke, or by the insertion of a third spindle into apertures in the arm and yoke.