A farmer sows beans in his fields after harvesting a crop of wheat. The agricultural practice he is following is

Options

A. crop rotation
B. multiple cropping
C. field fallow
D. mixed cropping

Explanation

**Step-by-Step Solution:**

1. **Understanding the Question**: The question asks about the agricultural practice a farmer is following when he sows beans in his field after harvesting wheat.

2. **Identifying the Crops**: The farmer first grows wheat, which is a crop that depletes nitrogen from the soil. After harvesting wheat, he plants beans, which are leguminous plants.

3. **Role of Leguminous Plants**: Leguminous plants like beans have nitrogen-fixing bacteria in their roots. These bacteria can convert atmospheric nitrogen into a form that plants can use, thereby replenishing the nitrogen content in the soil.

4. **Concept of Crop Rotation**: The practice of growing different crops in succession on the same land to improve soil fertility and reduce nutrient depletion is known as crop rotation. In this case, wheat is followed by beans.

5. **Conclusion**: The agricultural practice the farmer is following by sowing beans after harvesting wheat is called **crop rotation**.

**Final Answer**: The agricultural practice he is following is **crop rotation**.

---