Soil is the topmost layer of the earth that supports plant life and farming. India has a wide variety of soils due to its different climate and landforms. The ICAR classifies Indian soils into eight types. Soil types are an important geography topic for exams.
Alluvial Soil
- It is the most fertile and most widespread soil in India.
- It is found in the Northern Plains and river deltas.
- It is rich in potash but poor in nitrogen and humus.
- It is good for wheat, rice and sugarcane.
Black Soil
- Also called regur soil or black cotton soil.
- It is found mainly in the Deccan Plateau (Maharashtra, Gujarat, MP).
- It is ideal for growing cotton.
- It is rich in calcium, magnesium and potash but poor in nitrogen.
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Red and Laterite Soils
- Red soil gets its colour from iron oxide and is found in Tamil Nadu, Karnataka and the eastern Deccan.
- Laterite soil forms in areas of high rainfall and is good for tea, coffee and cashew.
Other Soils
- Arid (desert) soil - sandy and saline, found in Rajasthan.
- Mountain (forest) soil - found on hill slopes.
- Saline and peaty soils are found in specific regions.
Quick Revision Points
- Alluvial soil is the most fertile and widespread.
- Black soil (regur) is best for cotton.
- Red soil gets its colour from iron oxide.
- Laterite soil forms in high rainfall areas.
- Most Indian soils are poor in nitrogen and humus.
- ICAR classifies soils into eight types.
- Arid soil is found in Rajasthan.