NEET Biology: Biology - Ecology questions with solutions

Q1. Which of the following characteristics is not a function of humus in soil?

1. Provides nutrients
2. Raises pH
3. Retains moisture
4. Humus does all of the above in soil

Answer: Raises pH

Humus contributes nutrients and improves moisture retention, but it does not generally raise soil pH. In fact, humus often has a buffering effect and can be slightly acidic rather than alkaline.