Which of the following is not true for fertilizers?

Options

A. They increase the yield
B. Their excessive use disturbs the balance of nutrients in soil.
C. They are generally used in small quantity
D. They are environment friendly.

Answer

To determine which statement about fertilizers is not true, we will analyze each option provided in the question.

### Step-by-Step Solution:

1. **Understanding Fertilizers**: Fertilizers are substances that are added to soil or plants to provide essential nutrients that promote plant growth. They are crucial in agriculture for increasing crop yield.

2. **Evaluating the Statements**:
- **Statement 1**: Fertilizers increase the yield.
- This statement is true. Fertilizers provide essential nutrients that enhance plant growth and productivity.

- **Statement 2**: Excessive use of fertilizers disturbs the balance of nutrients in the soil.
- This statement is also true. Overuse of fertilizers can lead to nutrient imbalances, harming soil health and fertility.

- **Statement 3**: They are generally used in small quantities.
- This statement is true. While fertilizers can be powerful, they are typically applied in small amounts to avoid over-fertilization.

- **Statement 4**: They are environment friendly.
- This statement is not true. Many fertilizers can lead to environmental pollution, such as water contamination and soil degradation, which contradicts the idea of being environmentally friendly.

3. **Conclusion**: Based on the evaluation of the statements, the statement that is not true for fertilizers is that they are environment friendly.

### Final Answer:
The statement that is not true for fertilizers is: **They are environment friendly.**

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