Which of the following is incorrect for green manure?

Options

A. It supplies organic matter
B. It supplies nitrogen
C. It prevents soil erosion
D. It allows leaching

Explanation

To determine which statement is incorrect regarding green manure, let's analyze each option provided:

1. **It supplies organic matter.**
- Green manure is typically made from green plants that are plowed into the soil. This process adds organic matter to the soil, improving its structure and fertility.
- **Conclusion:** This statement is correct.

2. **It supplies nitrogen.**
- Many green manure crops, especially legumes, have the ability to fix atmospheric nitrogen into the soil. This enriches the soil with nitrogen, which is essential for plant growth.
- **Conclusion:** This statement is correct.

3. **It prevents soil erosion.**
- The use of green manure can help in preventing soil erosion by providing ground cover, which protects the soil from wind and water erosion.
- **Conclusion:** This statement is correct.

4. **It allows leaching.**
- Leaching refers to the process where nutrients are washed away from the soil, often due to excessive rainfall or irrigation. Green manure does not promote leaching; rather, it helps retain nutrients in the soil.
- **Conclusion:** This statement is incorrect.

5. **It removes the chemicals present in the soil.**
- Green manure does not inherently remove chemicals from the soil. Instead, it can help improve soil health and nutrient content.
- **Conclusion:** This statement is also incorrect, but it is not the focus of the question.

Based on the analysis, the incorrect statement regarding green manure is:

**Answer:** It allows leaching.