This table lists soil conversion methods. which best replaces the question mark

Contour ploughing

Explanation: The soil conservation can be defined as the techniques that are opted to conserve soil. It is necessary for the soil to be conserved as it is necessary for the growth of plants.

There are various methods that can be used to conserve soil. Contour ploughing is one of them. In this method furrows are made that move left to right to maintain a constant altitude.

This technique reduces the runoff which helps in the soil conservation.