Study the diagram given below and then answer the questions.
Briefly describe how nitrogen of the atmosphere is converted to nitrates by leguminous plants.

Explanation

**Step-by-Step Solution:**

1. **Introduction to Nitrogen Fixation**: Nitrogen from the atmosphere is abundant, but most plants cannot use it directly. Leguminous plants have a special relationship with certain bacteria that help convert atmospheric nitrogen into a usable form.

2. **Role of Rhizobium**: The bacteria responsible for this conversion are called Rhizobium. These bacteria live in the root nodules of leguminous plants, such as peas, beans, and clover.

3. **Process of Nitrogen Fixation**: When leguminous plants grow, they form root nodules that house Rhizobium bacteria. These bacteria take in atmospheric nitrogen (N₂) and convert it into ammonia (NH₃) through a process known as nitrogen fixation.

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