Question

Which of the following biological practices increases the fertility of soil?

• A. Vermicomposting
• B. Biological nitrogen fixation
• C. Pasteurization
• D. Both A and B

Answer 1

The correct option is D Both A and B

Vermicomposting is the process in which the worms are used for the breakdown of the organic matter and production of compost. The compost contains a high amount of nutrients and increases the fertility of the soil.

Certain bacteria and algae form the symbiotic association with the roots of the plants and fix the atmospheric nitrogen into nitrates which can be used by the plants. This nitrates and nitrites increase the nitrogen content of the soil and allow the growth of plants.

Thus, the correct answer is option D.