Name: 3 types of biofertilisers with example.

Answer

To answer the question regarding the three types of biofertilizers along with examples, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Types of Biofertilizers**:
- Biofertilizers can be classified into three main types based on their function and association with plants.

2. **Type 1: Nitrogen-Fixing Bacteria**:
- This type of biofertilizer includes bacteria that can fix atmospheric nitrogen into a form that plants can use.
- **Example**: **Rhizobium** - This is a symbiotic nitrogen-fixing bacterium that forms a relationship with the roots of leguminous plants, helping them in nitrogen fixation.

3. **Type 2: Nitrogen-Fixing Cyanobacteria**:
- Cyanobacteria are photosynthetic bacteria that also have the ability to fix nitrogen.
- **Example**: **Anabaena** - This is a genus of nitrogen-fixing cyanobacteria that can be found in aquatic environments and in symbiotic relationships with certain plants.

4. **Type 3: Mycorrhizal Fungi**:
- Mycorrhizal fungi form associations with plant roots, enhancing nutrient uptake, particularly phosphorus.
- **Example**: **Glomus** - This is a genus of arbuscular mycorrhizal fungi that forms beneficial relationships with many plant species.

### Final Answer:
The three types of biofertilizers are:
1. **Nitrogen-Fixing Bacteria** (e.g., Rhizobium)
2. **Nitrogen-Fixing Cyanobacteria** (e.g., Anabaena)
3. **Mycorrhizal Fungi** (e.g., Glomus)

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