Preventive measures: 1 Mark each
Soil erosion can be prevented by the following methods:
1. Afforestation: Afforestation means planting trees.The roots of the trees hold the soil layer firmly and prevent soil erosion.
2. Improve drainage: Areas with heavy water runoff can use underground perforated drainage pipes which will help prevent soil erosion.
3. Contour farming and terracing: It is the practice of tilling sloped land along lines of consistent elevation in order to conserve rainwater and to reduce soil losses from surface erosion.