Which of the given statements is not correct?

Options

A. Crop rotation increases nutrients content of the soil.
B. Crop rotation helps in controlling pests and weeds.
C. Crop rotation helps to reduce soil pollution.
D. Crop rotation helps mixing of fertilisers uniformly.

Explanation

**Step-by-Step Solution:**

1. **Understand the Question**: The question asks which of the given statements about crop rotation is not correct.

2. **Review Each Statement**:
- **Statement 1**: "Crop rotation increases nutrient content of the soil."
- This statement is correct. Different crops contribute different nutrients to the soil, and rotating them helps replenish lost nutrients.

- **Statement 2**: "Crop rotation helps in controlling pests and weeds."
- This statement is also correct. By changing the types of crops grown, it disrupts the life cycles of pests and reduces weed growth.

- **Statement 3**: "Crop rotation helps to reduce soil pollution."
- This statement is correct as well. Crop rotation can reduce the need for chemical fertilizers and pesticides, thereby decreasing soil pollution.

- **Statement 4**: "Crop rotation helps in mixing of fertilizers uniformly."
- This statement is incorrect. Crop rotation is not primarily about mixing fertilizers; it focuses on enhancing soil fertility, controlling pests, and improving nutrient content.

3. **Identify the Incorrect Statement**: After reviewing all the statements, we find that the fourth statement is not correct.

4. **Conclusion**: The statement that is not correct is "Crop rotation helps in mixing of fertilizers uniformly."

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