Least pore size seen in

Options

A. clayey soil
B. sandy soil
C. loamy soil
D. gravelly soil

Answer

To determine which type of soil has the least pore size, we can analyze the characteristics of the four types of soil mentioned: clayey soil, sandy soil, loamy soil, and gravelly soil.

### Step-by-Step Solution:

1. **Understanding Soil Types**:
- **Clayey Soil**: This type consists of the smallest particles. The particles are tightly packed together, resulting in very little air space and thus the least pore size.
- **Sandy Soil**: Sandy soil consists of larger particles and has a loose structure. It has a high pore size and low water retention capacity.
- **Loamy Soil**: Loamy soil is a mixture of sand, silt, and clay. It has moderate pore size and good water retention, making it suitable for farming.
- **Gravelly Soil**: This soil consists of larger rock fragments and has a high pore size, allowing for good drainage but low water retention.

2. **Analyzing Pore Sizes**:
- **Clayey Soil**: Due to its small particle size and tight packing, it has the least pore size.
- **Sandy Soil**: Has larger particles and higher pore size.
- **Loamy Soil**: Has a mix of particle sizes, resulting in moderate pore size.
- **Gravelly Soil**: Has the largest particles and therefore the largest pore size.

3. **Conclusion**:
- Based on the analysis, clayey soil has the least pore size because it is composed of the smallest particles that are tightly packed together, leading to minimal air space.

### Final Answer:
The least pore size is seen in **clayey soil**.

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