What is the inversion method of the field plow

Inversion method. Also known as closed ridge tillage. The unit ploughs the first plough on the left side of the center line of the ploughing area. After reaching the top of the field and plowing, it turns in a clockwise direction. Close to the first plow, return to the second plow, and cyclically plow in turn. In this way, closed ridges are formed in the middle of the ploughing area, and the soil ridges are turned toward the center of the ground until the last plough (recovering moisture) is ploughed at the edge of the ground. Therefore, the inversion method is also called closed ridge tillage or centripetal tillage.