What type of plants can fix nitrogen gas of the air into compounds of nitrogen ?

Explanation

**Step-by-Step Solution:**

1. **Understanding Nitrogen Fixation**: Nitrogen fixation is the process by which nitrogen gas (N₂) from the atmosphere is converted into a form that plants can use, such as ammonia (NH₃) or other nitrogen compounds.

2. **Identifying the Type of Plants**: The plants that are capable of fixing atmospheric nitrogen are known as leguminous plants. These plants belong to the family Leguminosae.

3. **Role of Bacteria**: Within the roots of leguminous plants, there are specific bacteria that play a crucial role in nitrogen fixation. These bacteria are often found in specialized structures called root nodules.

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