Mulching an agronomic measure of soil conservation :
Mulching an agronomic measure of soil conservation, is very effective because it ?
1. Protects soil from gully erosion
2. Protects soil from sheet wash and wind erosion
3. Helps soil to retain moisture and nutrients
Select the correct answer using the code given below.
- 1 only
- 1 and 2 only
- 2 and 3 only
- 1, 2 and 3