Ploughing helps in

Options

A. loosening of soil
B. distribution of nutrients
C. removal of microorganisms
D. none of these.

Explanation

### Step-by-Step Solution:

1. **Understanding Ploughing**: Ploughing, also known as tilling, is the agricultural practice of turning over the upper layer of soil. This process is essential for preparing the land for planting crops.

2. **Purpose of Ploughing**: The primary purpose of ploughing is to loosen the soil. When the soil is loosened, it allows for better aeration and drainage, which are crucial for healthy plant growth.

3. **Mixing of Nutrients**: During the ploughing process, the soil is mixed, which helps in the distribution of nutrients present in the soil. This mixing ensures that the nutrients are accessible to the plants.

4. **Improving Soil Structure**: Ploughing also improves the structure of the soil, making it less compact. A loose soil structure allows roots to penetrate more easily and access water and nutrients.

5. **Oxygen Infiltration**: By loosening the soil, ploughing facilitates the infiltration of oxygen into the soil. Oxygen is vital for the survival of plant roots and beneficial soil microorganisms.

6. **Conclusion**: Therefore, the main benefit of ploughing is the loosening of the soil, which enhances aeration, nutrient mixing, and overall soil health, making it ready for crop growth.