Topic Details (Notes format)

Soil

Subject: General Science

Book: NCERT Science Class 7

Soil is the uppermost layer of the Earth where plants grow. It is formed by the weathering of rocks over thousands of years.
- **Types of Soil**:
1. **Sandy soil**: Loose texture, cannot hold water (found in deserts).
2. **Clayey soil**: Sticky and retains water (suitable for rice cultivation).
3. **Loamy soil**: Mixture of sand and clay, very fertile (ideal for crops).

- **Importance of Soil**:
- Supports plant growth.
- Home for many organisms like earthworms.
- Helps in water retention.

**Possible Exam Questions:**
1. How is soil formed?
2. What are the different types of soil? Which soil is best for farming?
3. Why is soil conservation important?
4. How does soil erosion affect agriculture?
5. Explain the role of earthworms in soil fertility.