Which of the following methods are used to restrict soil erosion?
A. Ploughing along contour lines
B. Strip cropping
C. Jhumming
D. Mixed farming
A and B
Ploughing along the contour lines can decelerate the flow of water down the slopes, is called contour ploughing large fields can be divided into strips. Strips of grass are left to grow between the crops. This method called strip cropping.