Question

1). Choose the correct option:-

a). Of the earth's total water resources, the fresh water available for our use is

1. More than 90%
2. 50%
3. 1%
4. Less than 1%

b). Which of the following is not a method of checking soil erosion

1. afforestation
2. terracing
3. salinisation
4. contour ploughing

c). Which of the following help preserve soil fertility

1. Mulching
2. Crop rotation
3. Plugging gullies
4. Fallowing
​

Answer 1

Answer:

a. 3-1

b. 3-salanisation

c. 2-crop rotation