Major Soil Types in India: ICAR Classification
The Indian Council of Agricultural Research (ICAR) classifies Indian soils into eight major groups based on geological origin, mineralogy, and physical morphology.
These soils span fertile alluvial river plains, moisture-retentive basaltic black soils, porous red soils, and weathered laterite formations.
- Alluvial Soils (Inceptisols/Entisols): Covers over 40 percent of total land area across the Indo-Gangetic-Brahmaputra plains and coastal deltas
- Black Soils / Regur (Vertisols): Basaltic volcanic soils of the Deccan plateau (Maharashtra, MP, Gujarat) rich in montmorillonite clay
- Red and Yellow Soils (Alfisols): Formed from crystalline igneous rocks in Tamil Nadu, Odisha, and Chota Nagpur plateau
- Laterite Soils (Oxisols/Ultisols): Leached tropical soils in high-rainfall Western Ghats and Meghalaya hills
- Arid & Desert Soils (Aridisols): Sandy soils in Western Rajasthan and Gujarat with high soluble salts and low organic matter
- Mountain & Forest Soils: Immature organic-rich soils in the Himalayan belt supporting temperate horticulture
Physical Characteristics and Nutrient Dynamics
Each soil type displays distinctive physical properties—including water holding capacity, drainage permeability, cation exchange capacity (CEC), and natural nutrient reserves.
Black cotton soils possess self-ploughing characteristics, swelling when wet and developing deep fissures upon drying, while sandy arid soils demand frequent light irrigations due to rapid leaching.
- Alluvial Soil: Loamy to clayey texture; high in potash and lime; typically deficient in nitrogen and phosphorus
- Black Soil: Extremely fine clay; high moisture-retention capacity; rich in calcium carbonate and iron; deficient in nitrogen and zinc
- Red Soil: Porous friable texture colored by ferric oxides; low water retention; deficient in nitrogen, phosphorus, and organic carbon
- Laterite Soil: Intensely leached by heavy rainfall; acidic pH (5.0 to 6.0); deficient in lime, magnesium, and nitrogen
Crop Suitability and Soil Health Card Management
Aligning crop selection with intrinsic soil characteristics optimizes productivity while minimizing synthetic input costs.
Under the National Soil Health Card scheme, farmers receive periodic laboratory soil test analyses evaluating 12 essential chemical parameters to guide balanced nutrient management.
- Alluvial crops: Intensive cereal-pulse-oilseed systems including wheat, paddy, sugarcane, maize, and mustard
- Black soil crops: Cotton, soybean, pigeonpea (tur), sorghum, wheat, and citrus
- Red soil crops: Groundnut, finger millet (ragi), tobacco, pulses, and oilseeds
- Laterite crops: Plantation crops including tea, coffee, rubber, cashew, and black pepper
- Soil Health Card: Test N, P, K, secondary Sulphur, and micronutrients (Zn, Fe, Cu, Mn, B) every 2 years
Official source
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National Bureau of Soil Survey and Land Use Planning (ICAR-NBSS&LUP) ↗Related on KisanPe
Common questions
Which soil type covers the largest geographical area in India?
Alluvial soil covers the largest area in India (over 40 percent of total agricultural land), primarily across the northern river plains and coastal deltas.
Why are black cotton soils called 'self-ploughing' soils?
Due to high montmorillonite clay content, black soils expand and become sticky when wet, and shrink to form deep, wide cracks when dry, naturally aerating the soil.
How can a farmer improve the fertility of acidic laterite soils?
Applying agricultural lime (calcium carbonate) or dolomite corrects soil acidity, while incorporating green manures and farmyard manure restores organic carbon.
General guidance, not personal advice. For your farm, ask your local Krishi Vigyan Kendra or agriculture officer.
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