Need and Techniques for Soil Management

Q.

Forests prevent soil erosion.

1. True
2. False

Q. Nitrogen is a micronutrient.

1. True
2. False

Q. Select the correct option.

Assertion : When the crop is changed during crop rotation, the weeds associated with it usually disappear.

Reason : The weeds are very choosy about the crop with which they grow.

1. Both assertion and reason are correct and reason is the correct explanation of assertion.
2. Both assertion and reason are correct, but reason is not the correct explanation of assertion.
3. Assertion is correct but reason is incorrect.
4. Assertion and reason are incorrect.

Q. Soil erosion can be controlled by __________.

1. winds
2. mining
3. floods
4. trees