Soils of India
The major soil types of India — alluvial, black, red, laterite, arid and forest soils — their formation, characteristics and the crops they support.
Key Takeaways
- Alluvial soil is the most widespread and fertile, covering the Northern Plains and coastal deltas.
- Black (regur) soil is ideal for cotton and is moisture-retentive; it forms on the Deccan lava (traps).
- Laterite soil forms in high-rainfall tropical areas and supports tea, coffee and cashew.
Core concept
Soil is the thin, weathered top layer of the Earth that supports plant life — a renewable but easily degraded resource. India's varied relief, climate and parent rock produce a rich mosaic of soils, each suited to particular crops.
Static foundation — the major soil types
India's Major Soils
| Soil | Where found | Features & crops |
|---|---|---|
| Alluvial | Northern Plains, coastal deltas | Most fertile & widespread; rich in potash; wheat, rice, sugarcane (Khadar > Bhangar) |
| Black (Regur) | Deccan Trap — Maharashtra, MP, Gujarat | Moisture-retentive, 'self-ploughing'; ideal for cotton, also pulses & oilseeds |
| Red & Yellow | Deccan periphery, TN, Odisha | From crystalline rocks; iron-oxide colour; less fertile; millets, pulses |
| Laterite | Western Ghats, NE, hilly high-rainfall areas | Leached, acidic; supports tea, coffee, cashew; used as brick |
| Arid / Desert | Rajasthan, W Gujarat | Sandy, saline, low humus; needs irrigation |
Key Soil Terms
Tap to reveal.
Soil degradation & conservation
Threats: erosion (water, wind), salinity/alkalinity (over-irrigation), desertification, and loss of fertility. Conservation: contour ploughing, terracing, strip cropping, afforestation, check dams, and crop rotation. India has committed to land-degradation neutrality under the UNCCD.
Prelims trap zones
- Khadar (new) is more fertile than Bhangar (old).
- Black soil = cotton; it forms on the Deccan lava, not from black rock colour.
- Laterite is formed by leaching in HIGH-rainfall areas — not in deserts.
Knowledge Check
2 questions · check your understanding
1. Which soil is best suited for cotton cultivation?
2. The new alluvial soil found in floodplains is called:
Prelims Pointers
- Khadar is new alluvium (fertile floodplains); Bhangar is older alluvium with kankar nodules.
- Black soil is also called 'regur' and is 'self-ploughing' (it develops cracks when dry).
- Red soil gets its colour from iron oxide; it forms on crystalline igneous rocks.
- Laterite soil is formed by intense leaching under high temperature and heavy rainfall.
Mains Angle
- 'Soil is a vital renewable resource that is being rapidly degraded.' Discuss soil conservation measures.
- Relate the distribution of India's major soils to its cropping pattern.
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