Ploughing with a traditional plough requires bed-like movement of the unit. The field is divided into beds (strips) and each of them is processed individually. Two ways of movements alternate. They are called “ridge” (moving in a clockwise direction) and “furrow̶

When ploughing a field with irregular (other than rectangular) shape with a trailed and semi-mounted reversible ploughs, unsymmetrical turns are produced – pear-shaped and eight-shaped. Correlations have been produced for determining the width of strip for turning when these tur