Mention the name of the bacterium which is found in the soil and takes part in nitrogen fixation.

Explanation

**Step-by-Step Solution:**

1. **Identify the Question:** The question asks for the name of a bacterium that is found in soil and participates in nitrogen fixation.

2. **Recall Relevant Information:** Nitrogen fixation is a process where certain bacteria convert atmospheric nitrogen (N₂) into ammonia (NH₃), which can be used by plants.

3. **Identify the Bacterium:** One well-known bacterium that performs nitrogen fixation in the soil is Azotobacter.

...