Question

Which of the following methods can help in preventing soil erosion? 1. Contour bunding 2. Cover cropping 3. Gully plugging 4. Crop rotation Select the correct answer using the code given below:

A 1, 2 and 3 only
B 2, 3 and 4 only
C 1, 2 and 4 only
D 1, 2, 3 and 4
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