Biofertilisers

Options

A. Increase dependence on chemical fertilisers
B. Are organisms that enrich the nutrient quality of soil
C. Include potash, phosphatic and nitrogenous organic and chemical compounds
D. Are used regularly in the fields to deplete soil nutrients

Answer

### Step-by-Step Solution:

1. **Understanding Biofertilizers**:
- Biofertilizers are defined as organisms that enhance the nutrient quality of the soil. They are primarily composed of living microorganisms that contribute to soil fertility.

2. **Identifying the Options**:
- The question presents four options regarding biofertilizers. We need to evaluate each option to determine which one accurately describes biofertilizers.

3. **Evaluating Each Option**:
- **Option 1**: "Increases dependence on chemical fertilizers."
- This is incorrect. Biofertilizers are used to reduce the dependence on chemical fertilizers, not increase it.

- **Option 2**: "Are organisms that enrich the quality of soil."
- This is correct. Biofertilizers consist of microorganisms that improve soil nutrient quality.

- **Option 3**: "Include potash, phosphatic and nitrogenous organic and chemical compounds."
- This is incorrect. Biofertilizers do not include chemical compounds; they are based on living organisms.

- **Option 4**: "Are used regularly in the fields to deplete soil nutrients."
- This is incorrect. Biofertilizers do not deplete soil nutrients; rather, they help maintain or enhance soil fertility.

4. **Conclusion**:
- After evaluating all options, the correct answer is **Option 2**: "Are organisms that enrich the quality of soil."