Most commonly used green manures in India are .

Options

A. Crotolaria juncea (Sunn hemp)
B. Sesbania aculeata (Dhaicha)
C. Cyamopsis tetragonoloba (Cluster bean)
D. all of these

Answer

To answer the question about the most commonly used green manures in India, we can follow these steps:

### Step-by-Step Solution:

1. **Understanding Green Manure**:
- Green manure refers to green plant material that is used to improve soil fertility. It is typically made from plants that are grown specifically for this purpose and then incorporated into the soil while still green.

2. **Types of Green Manure**:
- Green manures can be obtained in two ways:
- By growing specific green manure crops.
- By collecting green leaves and twigs from plants in wastelands or forests.

3. **Leguminous Plants**:
- The most commonly grown green manure crops are usually from the leguminous family, as they have the ability to fix nitrogen in the soil, enhancing its fertility.

4. **Examples of Common Green Manures**:
- Some of the most commonly used green manures in India include:
- **Sun Hemp (Crotalaria juncea)**
- **Dhaincha (Sesbania aculeata)**
- **Cluster Beans (Cyamopsis tetragonoloba)**
- Other notable examples include **Cremiopsis tetracontoloba** and **Crotolaria jonsi**.

5. **Conclusion**:
- Based on the above information, the most commonly used green manures in India are Sun Hemp, Dhaincha, and Cluster Beans, among others.

### Final Answer:
The most commonly used green manures in India are Sun Hemp, Dhaincha, and Cluster Beans.

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