Which Indian institute is the national authority on soil survey and classification?

The ICAR-National Bureau of Soil Survey and Land Use Planning (ICAR-NBSS&LUP), headquartered in Nagpur, is the national institute responsible for soil resource inventory, classification, soil-based land evaluation and land-use planning. It maintains India's 1:250,000 scale State Soil Atlas series and provides the taxonomic backbone referenced in the Soil Health Card programme.

What is the Soil Health Card and how is it linked to soil type?

The Soil Health Card (SHC) scheme, launched in 2015 and now run under the Soil Health & Fertility component of RKVY, issues every farmer a crop- and parcel-specific advisory based on a laboratory analysis of 12 soil parameters (pH, EC, organic carbon, available N-P-K, S and micronutrients Zn, Fe, Mn, Cu, B). The fertiliser dose and amendment (lime for acidic laterite, gypsum for sodic soils) is calibrated to the farmer's actual soil type and current nutrient status rather than a flat state recommendation. See our soil-health scheme page for the sampling protocol and portal.

Which soils are most prone to degradation in India?

ICAR-CSSRI and ICAR-NBSS&LUP mapping flags four degradation hotspots: (1) salinity and sodicity on the Indo-Gangetic plains and canal-command areas (~6.73 million hectares), (2) wind and water erosion on arid soils of Rajasthan and black-cotton Vertisols of the Deccan, (3) acidification of laterite and red soils in the Western Ghats and north-east, and (4) nutrient mining and declining organic carbon across intensively cropped alluvial tracts.

How does soil type influence choice of irrigation method?

Sandy arid soils and coarse red soils have low water-holding capacity and benefit most from micro-irrigation (drip, sprinkler) under the Per Drop More Crop component of PMKSY. Heavy Vertisols (black cotton soils) retain moisture well but crack-irrigate poorly; furrow or alternate-furrow irrigation suits them, and over-irrigation drives sodicity. Alluvial soils support surface irrigation and canal command. Peaty and saline soils need drainage before irrigation can be scaled.

Where can a farmer get their soil tested?

Soil tests under the Soil Health Card programme are conducted free of cost at Static Soil Testing Laboratories (STLs), Mobile STLs, Village-Level STLs and ICAR–KVK laboratories; the sample is drawn, geo-tagged and uploaded to the National Soil Health portal (soilhealth.dac.gov.in). Farmers can approach their nearest Krishi Vigyan Kendra, Block Agriculture Office or ATMA. Private NABL-accredited labs also provide fee-based testing for commercial farms.

Major Soil Types of India — Distribution, Characteristics and Suited Crops

India's soils are among the most varied in the world: eight major soil groups spread across ten agro-climatic zones underpin the country's cropping diversity, from floodplain rice in the Ganga delta to rainfed cotton on Deccan Vertisols, from Himalayan apple orchards to Thar bajra. This page is a reference primer to the eight dominant soil groups, their distribution and characteristics, and the crops they best suit, drawn from ICAR-NBSS&LUP (Nagpur), ICAR-CSSRI (Karnal) and ICAR-CAZRI (Jodhpur).

For scheme-level support on soil testing and amendments, see our Soil Health Card page. Climate-resilient management of these soils is the mandate of ICAR-NICRA; dryland-arid soils are the focus of ICAR-CAZRI, salt-affected soils of ICAR-CSSRI, and rainfed Vertisols of ICAR-CRIDA. Match a soil to the right sowing window using our India crop calendar, and see our Per Drop More Crop micro-irrigation guide for soil-matched irrigation scheduling. For soil-building practices, PKVY and the National Mission on Natural Farming support organic-carbon restoration; residue retention in situ is covered in our crop residue management guide. For broader agronomy context, browse the knowledge base.

The eight major soil groups

Alluvial Soil

Share of area: ~43% of India's geographical area (the single largest group)

Distribution: Covers the Indo-Gangetic–Brahmaputra plains, the lower valleys of the Narmada and Tapi, and the eastern coastal plains including the deltas of the Mahanadi, Godavari, Krishna and Kaveri; also found in strips along the western coast.

Characteristics: Formed by riverine deposition; textures grade from sandy loam (bhangar — older, higher terraces, slightly higher in kankar/CaCO₃ nodules) to loam and silty clay (khadar — newer floodplain deposits renewed by annual silt). Generally poor in nitrogen and organic carbon but rich in potash and lime; pH is near-neutral to slightly alkaline.

Suited crops: Rice, wheat, sugarcane, pulses, oilseeds, jute (lower Ganga) and a wide range of vegetables; this zone underpins India's two main cereal baskets.

Reference: ICAR-NBSS&LUP

Black Soil (Regur / Vertisols)

Share of area: ~15% of area

Distribution: The Deccan Trap region — Maharashtra, western Madhya Pradesh, parts of Gujarat (Saurashtra), northern Karnataka, Telangana and interior Tamil Nadu.

Characteristics: Weathered from basaltic lava; high clay content (montmorillonite) with strong swell–shrink behaviour producing deep cracks on drying. Dark colour from iron and humus–clay complexes. Rich in lime, iron, magnesia and alumina; low in nitrogen, phosphorus and organic matter; high moisture-retention capacity makes it ideal for rainfed cropping.

Suited crops: Cotton (hence "black cotton soil"), soybean, sorghum, pigeonpea, groundnut, sunflower, chickpea, linseed and tobacco.

Reference: ICAR-NBSS&LUP

Red and Yellow Soil

Share of area: ~18% of area

Distribution: Covers much of the Peninsular region on crystalline igneous and metamorphic rocks — eastern and southern Deccan, Chhotanagpur plateau, parts of Odisha, Chhattisgarh, Jharkhand, interior Tamil Nadu, Karnataka and south-eastern Maharashtra.

Characteristics: Reddish colour comes from diffusion of iron oxides in crystalline rocks; yellow forms where the soil is more hydrated. Coarse-textured on uplands (gravelly, porous, low in fertility); fine-textured and more fertile in valleys. Generally acidic to neutral; deficient in nitrogen, phosphorus and organic matter; respond strongly to irrigation and fertilisation.

Suited crops: Millets (ragi, jowar, bajra), groundnut, pulses, potato, tobacco; cotton, wheat and rice with irrigation.

Reference: ICAR-NBSS&LUP

Laterite Soil

Share of area: ~3% of area

Distribution: Summits of the Western Ghats (400–1200 m), parts of the Eastern Ghats, Rajmahal hills, Vindhyan range, Satpura, Malwa plateau, Odisha coast, Kerala, Karnataka, Assam hills and north-east Andhra; also in coastal Konkan.

Characteristics: Formed by intense leaching in a seasonally alternating wet–dry climate; silica is leached out and iron and aluminium oxides accumulate (hence the red–brown colour, locally hardening to brick-like crust — the Latin later = brick). Low in nitrogen, phosphorus, potash, lime and magnesia; organic matter is quickly mineralised; strongly acidic.

Suited crops: Cashew, tapioca, rubber, tea, coffee, coconut, areca-nut and pineapple with liming and nutrient management; also used extensively for building bricks.

Reference: ICAR-NBSS&LUP

Arid / Desert Soil

Share of area: ~4% of area

Distribution: Thar Desert of western Rajasthan, parts of Haryana, Punjab, Kutch (Gujarat) and southern Punjab; extends into the rain-shadow regions of the Deccan.

Characteristics: Sandy to sandy-loam, with low water-holding capacity and high evaporation; often has a kankar (calcareous) layer or gypsum accumulation at depth that restricts percolation. Low in organic matter and nitrogen; usually alkaline; high soluble salts in places. Dunes are mobile and need stabilisation.

Suited crops: Pearl millet (bajra), moth bean, cluster bean (guar), horse gram and barley rainfed; wheat, cotton, mustard and vegetables under canal, tube-well or micro-irrigation; dates and ber under agro-horticulture systems anchored by ICAR-CAZRI (Jodhpur).

Reference: ICAR-CAZRI

Mountain / Forest Soil

Share of area: ~8% of area

Distribution: Himalayan belt and the hills of the north-east; also the Nilgiris and parts of the Western Ghats above 1500 m. Varies strongly with altitude and vegetation.

Characteristics: Thin, immature, usually loamy with a well-developed forest-litter horizon on upper slopes; peaty-podzolic in cool-temperate conifer forests; silty loam in the valleys. Acidic in forest cover; low in bases, moderate to high in organic carbon. Prone to steep-slope erosion when forest cover is removed.

Suited crops: Tea, coffee, spices, apples and other temperate fruit, maize, potato, rice (terraced valleys), buckwheat, barley and millets; a hotspot of agroforestry systems.

Reference: ICAR-NBSS&LUP

Peaty and Marshy Soil

Share of area: <1% of area

Distribution: Backwaters of Kerala (Kuttanad), tidal and estuarine tracts of Odisha, Sundarbans in West Bengal, Tamil Nadu coast, parts of Uttarakhand and the Bihar swamps; occurs where decomposition of organic matter is slow due to waterlogging.

Characteristics: Dark, heavy, high in organic matter (sometimes >40%) and soluble salts; highly acidic (acid-sulphate on tidal drainage); often waterlogged for long periods; low in phosphorus and potassium relative to the organic matter load.

Suited crops: Rice (especially the below-sea-level Kuttanad polders), jute, coconut, cash crops in reclaimed polders; needs drainage, liming and salt-management.

Reference: ICAR-NBSS&LUP

Saline and Alkaline Soil (Usara / Reh / Kallar)

Share of area: ~6.73 M ha affected (ICAR-CSSRI estimate: ~2.95 M ha saline + ~3.77 M ha sodic/alkaline)

Distribution: Patches across the Indo-Gangetic plains (western Uttar Pradesh, Haryana, Punjab, Bihar), coastal Gujarat, Rann of Kutch, parts of Rajasthan, deltaic Andhra Pradesh and West Bengal; expanding under poorly drained canal-irrigation.

Characteristics: Saline soils have excess soluble salts (ECe > 4 dS/m); sodic/alkaline soils have exchangeable sodium percentage (ESP) > 15 and a dense, impermeable sub-surface. Both restrict water infiltration and nutrient uptake; often develop white salt efflorescence (reh) at the surface in the dry season.

Suited crops: Salt-tolerant varieties — rice (CSR series), wheat (KRL series), mustard, barley; agroforestry with Prosopis, Casuarina or Salvadora on severely degraded land; reclamation using gypsum (for sodic), drainage and leaching, pioneered by ICAR-CSSRI.

Reference: ICAR-CSSRI

FAQs

Which Indian institute is the national authority on soil survey and classification?: The ICAR-National Bureau of Soil Survey and Land Use Planning (ICAR-NBSS&LUP), headquartered in Nagpur, is the national institute responsible for soil resource inventory, classification, soil-based land evaluation and land-use planning. It maintains India's 1:250,000 scale State Soil Atlas series and provides the taxonomic backbone referenced in the Soil Health Card programme.
What is the Soil Health Card and how is it linked to soil type?: The Soil Health Card (SHC) scheme, launched in 2015 and now run under the Soil Health & Fertility component of RKVY, issues every farmer a crop- and parcel-specific advisory based on a laboratory analysis of 12 soil parameters (pH, EC, organic carbon, available N-P-K, S and micronutrients Zn, Fe, Mn, Cu, B). The fertiliser dose and amendment (lime for acidic laterite, gypsum for sodic soils) is calibrated to the farmer's actual soil type and current nutrient status rather than a flat state recommendation. See our soil-health scheme page for the sampling protocol and portal.
Which soils are most prone to degradation in India?: ICAR-CSSRI and ICAR-NBSS&LUP mapping flags four degradation hotspots: (1) salinity and sodicity on the Indo-Gangetic plains and canal-command areas (~6.73 million hectares), (2) wind and water erosion on arid soils of Rajasthan and black-cotton Vertisols of the Deccan, (3) acidification of laterite and red soils in the Western Ghats and north-east, and (4) nutrient mining and declining organic carbon across intensively cropped alluvial tracts.
How does soil type influence choice of irrigation method?: Sandy arid soils and coarse red soils have low water-holding capacity and benefit most from micro-irrigation (drip, sprinkler) under the Per Drop More Crop component of PMKSY. Heavy Vertisols (black cotton soils) retain moisture well but crack-irrigate poorly; furrow or alternate-furrow irrigation suits them, and over-irrigation drives sodicity. Alluvial soils support surface irrigation and canal command. Peaty and saline soils need drainage before irrigation can be scaled.
Where can a farmer get their soil tested?: Soil tests under the Soil Health Card programme are conducted free of cost at Static Soil Testing Laboratories (STLs), Mobile STLs, Village-Level STLs and ICAR–KVK laboratories; the sample is drawn, geo-tagged and uploaded to the National Soil Health portal (soilhealth.dac.gov.in). Farmers can approach their nearest Krishi Vigyan Kendra, Block Agriculture Office or ATMA. Private NABL-accredited labs also provide fee-based testing for commercial farms.

Sources & further reading

ICAR-NBSS&LUP — National Bureau of Soil Survey and Land Use Planning, Nagpur: soil resource inventory, State Soil Atlas and land-evaluation framework.
ICAR-CSSRI — Central Soil Salinity Research Institute, Karnal: salt-affected soil mapping, reclamation and salt-tolerant varieties.
ICAR-CAZRI — Central Arid Zone Research Institute, Jodhpur: desert-soil stabilisation, agro-horticulture and dryland cropping systems.
National Soil Health Portal — Soil Health Card scheme portal (Ministry of Agriculture & Farmers Welfare).
ICAR Krishi Portal and the network of Krishi Vigyan Kendras.

Disclaimer: this page is a general reference and area shares are indicative; local soil behaviour varies strongly within an agro-ecological subregion. Farm-level decisions should be based on a current Soil Health Card analysis and advice from the nearest Krishi Vigyan Kendra or state department of agriculture.