With reference to soil conservation, consider the following practices:
- Crop rotation
- Sand fences
- Terracing
- Wind breaks
Which one of the following is correct in respect of the above statements?
- 1, 2 and 3 only
- 2 and 4 only
- 1, 3 and 4 only
- 1, 2, 3 and 4
Explanation
Option (d) is correct
- Crop rotation helps maintain soil fertility and reduces erosion by alternating crops with different nutrient demands and root structures.
- Sand fences are used in arid and semi-arid regions to reduce wind velocity and prevent wind erosion of topsoil.
- Terracing is a widely used method in hilly and sloping regions. It reduces surface runoff and soil erosion by breaking slopes into steps.
- Wind breaks, consisting of rows of trees or shrubs, reduce wind speed and protect soil from erosion.
