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

Explanation

### Step-by-Step Solution for the Question on Biofertilizers:

1. **Definition of Biofertilizers**:
- Biofertilizers are defined as active groups of microorganisms that enhance the fertility of the soil. These microorganisms include bacteria, fungi, and algae.

2. **Role of Microorganisms**:
- These microorganisms can work either individually or in a collective manner to improve soil fertility. This means they can act alone or in groups to promote the growth of plants.

3. **Mechanism of Action**:
- One of the key functions of biofertilizers is their ability to fix atmospheric nitrogen. This process enriches the nutrient quality of the soil, making it more conducive for plant growth.

4. **Benefits of Biofertilizers**:
- By increasing the nutrient quality of the soil, biofertilizers contribute to better plant growth and yield. They are an eco-friendly alternative to chemical fertilizers.

5. **Distinction from Chemical Fertilizers**:
- Unlike chemical fertilizers, which can lead to soil degradation and increased dependence on synthetic inputs, biofertilizers promote sustainable agricultural practices.

6. **Components of Biofertilizers**:
- Biofertilizers may include various organic compounds that provide essential nutrients such as nitrogen, phosphorus, and potassium to the soil.