With reference to soil conservation, consider the following practices:
1. Crop rotation
2. Sand fences
3. Terracing
4. Windbreaks
Which of the above are considered appropriate methods for soil conservation in India?
1
1, 2 and 3 only
2
2 and 4 only
3
1, 3 and 4 only
4
1, 2, 3 and 4