Q: 75 (NDA-I/2014)

Mulching, an agronomic measure of soil- conservation, is very effective because it
1. protects soil from gully erosion
2. protects soil from sheetwash and wind erosion
3. helps soil to retain moisture and nutrients
Select the correct answer using the code given below.
question_subject: 
Geography
stats: 
0,1432,2680,184,408,1360,2160