Rotary paddle harrows.
Another type of rotary harrow is a paddle harrow, known as rotary cultivator. The rotary cultivator is a tool mounted on a tractor. Its working shafts are oblique to each other and form an articulated rhombus. This articulation allows the rollers to follow ground unevenness. Rotary rippers are used for seasoning soil after spring plowing, on which large lumps of earth stick out. They can also be used for mixing sown mineral fertilizers with the soil and for destroying weeds and loosening compact and turfed soils..