With reference to soil conservation, consider the following practices: 1. Crop rotation 2. Sand fences 3. Terracing 4. Wind breaks Which of the above are considered appropriate methods for soil conservation in India ?
Options
(a)1, 2 and 3 only
(b)2 and 4 only
(c)1, 3 and 4 only
(d)1, 2, 3 and 4
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