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1. |
Which of the following is/are methods of checking soil erosion? 1. Strip cropping 2. Contour ploughing 3. Use of irrigation and fertilisers 4. Terrace farming |
A. | 1 and 2 |
B. | 3 and 4 |
C. | 2, 3 and 4 |
D. | 1, 2, 3 and 4 |
Answer» E. | |