Note: This chapter was removed from the NCERT curriculum in the 2022 rationalization. Retained here as land degradation, soil conservation, water scarcity, and wildlife protection are core GS3 environment topics.

Why this chapter matters for UPSC: Land degradation, soil types, groundwater depletion, biodiversity hotspots, and wildlife conservation laws appear consistently in GS3. The soil classification map of India is essential for GS1 physical geography. India's forest cover data (ISFR 2023) and Project Tiger/Elephant statistics are standard Prelims questions.

PART 1 — Quick Reference Tables

Soil Type	Region	Best Crops	Key Feature
Alluvial	Ganga-Brahmaputra-Indus plains, coastal deltas	Wheat, rice, sugarcane, cotton, oilseeds	Most fertile; two types — khadar (new, light) and bhangar (old, dark)
Black / Regur	Deccan Plateau (Maharashtra, MP, Gujarat, AP, Karnataka)	Cotton (best), sorghum, linseed	Formed from basalt lava; self-ploughing (swells when wet, cracks when dry); high clay and moisture retention
Red / Yellow	Odisha, Chhattisgarh, Tamil Nadu, AP, parts of MP	Groundnut, millets, tobacco	Red colour from iron oxide (Fe₂O₃); yellow when hydrated; low fertility
Laterite	AP, Karnataka, Kerala, Tamil Nadu, Meghalaya hills	Tea, coffee, cashew, rubber	Acidic; leached (silica removed); suitable for plantation crops; not good for food grains
Arid / Desert	Rajasthan, parts of Gujarat, Punjab	Drought-resistant millets, bajra	Sandy, saline, low humus; requires irrigation
Forest / Mountain	Himalayan slopes, NE India, Western Ghats	Tea (Darjeeling), spices	High humus; varies with altitude; immature

Wildlife Programme	Year	Details
Wildlife Protection Act	1972	Four schedules; hunting banned; CITES implementation
Project Tiger	1973	58 Tiger Reserves (58th = Madhav NP, MP, March 2025); wild tiger count ~3,682 (2022 census — latest official)
Project Elephant	1992	33 Elephant Reserves; population ~22,446 (DNA-based SAIEE census, Oct 2025); earlier visual count was 29,964 (2017) — apparent drop is largely methodological
Project Snow Leopard	2009	Himalayan states; 718 individuals (SPAI 2024 — official national estimate; Ladakh 477, Uttarakhand 124, HP 51)
Project Crocodile	1975	Three species: mugger, gharial, saltwater crocodile
Biological Diversity Act	2002	National Biodiversity Authority (NBA, Chennai), State Biodiversity Boards

PART 2 — Detailed Notes

Land Resources

Key Term

Land Use Categories (India):

Forest land: 24.84% of geographical area (ISFR 2023 — 8,27,357 sq km)
Land under non-agricultural use: Urban areas, roads, industries, settlements
Barren and wasteland: Rocky, arid, desert land not currently productive
Net Sown Area: Land sown with crops at least once in the agricultural year (~140 million hectares)
Current Fallow: Land left unsown in current year for soil restoration
Other Fallow: Land left uncultivated for 1–5 years
Permanent Pasture and Grazing Land
Land under Miscellaneous Tree Crops and Groves

India's Degraded Land: Approximately 120 million hectares of India's land is degraded. India has committed to Land Degradation Neutrality (LDN) under the UNCCD (UN Convention to Combat Desertification, adopted 1994) — restoring 26 million hectares of degraded land by 2030.

UPSC Connect

UPSC GS3 — Land Degradation Causes:

Soil erosion by water: Sheet erosion (gentle slopes), rill erosion (small channels), gully erosion (deep channels — Chambal ravines/badlands of MP/UP/Rajasthan)
Wind erosion: Thar Desert; desertification — advancing ~1 km/year in some regions
Waterlogging: Punjab and Haryana — excess canal irrigation raises water table; root zone anaerobic; affects ~8.5 million hectares
Salinization/Alkalinization: Irrigation without drainage → salts accumulate in topsoil — "usar" or "reh" soils in UP; affects ~6.7 million hectares
Shifting cultivation (Jhum): NE India — slash and burn; soil exposed to erosion; fertility drops quickly after 2-3 years
Overgrazing: Common land degradation; destroys vegetative cover; ~0.69 million sq km affected
Mining and quarrying: Open-cast mining leaves barren pits; acid mine drainage; Jharkhand, Odisha, Goa

Land Reforms in India:

Zamindari Abolition (1950s): Intermediaries removed; land rights to actual tillers
Tenancy reforms: Security of tenure, fair rent (~25% of produce), right to purchase
Land ceiling laws: Maximum land any family can hold; surplus redistributed to landless
Bhoodan Movement (Vinoba Bhave, 1951): Voluntary donation of land by wealthy to landless; ~4.4 million acres donated
Operation Barga (West Bengal, 1978): Registration of sharecroppers; ensured security of tenure

Soil Resources

Key Term

Soil Erosion Types:

Gully erosion: Running water cuts deep channels through soil — creates "ravines" (khadar/bad lands); Chambal valley in MP, UP, Rajasthan is the classic example
Sheet erosion: Thin layer of soil removed over wide area by rainwater runoff — less visible but widespread
Wind erosion: Deflation (blowing away of fine particles), abrasion (sandblasting effect), deposition — Thar Desert and dust storms

Soil Conservation Methods:

Contour ploughing: Ploughing along contour lines (not up/down slope) — reduces runoff velocity
Terrace farming: Step-like fields on steep slopes — Himalayan hills; reduces slope length and runoff
Strip cropping: Alternate strips of crops and grass — breaks wind and water flow
Shelter belts (windbreaks): Rows of trees planted perpendicular to wind direction — Rajasthan, Punjab
Check dams: Small dams across gullies — slow water, trap sediment, recharge groundwater
Afforestation and reforestation: Permanent vegetation cover
Crop rotation: Alternating nitrogen-fixing crops (legumes) with depleting crops — restores soil health

Water Resources

UPSC Connect

UPSC GS3 — Water Scarcity and Management:

India's Water Balance:

Annual precipitation: ~4,000 BCM (billion cubic metres)
Utilisable water (surface + groundwater): ~1,123 BCM
Surface water utilizable: ~690 BCM; Groundwater: ~433 BCM
India is the world's largest groundwater extractor — ~250 BCM/year (25% of global extraction)

Water Stress Thresholds (Falkenmark Index):

Water Scarcity: < 1,000 m³/capita/year
Water Stress: < 1,700 m³/capita/year
India's per capita availability: ~1,486 m³/year (2021) — already in water stressed category

Groundwater Crisis:

21 major Indian cities were projected to exhaust groundwater by 2020 (NITI Aayog CWMI report, 2018); a separate projection in the same report warns 40% of India's population may lack drinking water access by 2030
CGWB (Central Ground Water Board) classifies blocks as: Safe, Semi-critical, Critical, Over-exploited
Over-exploited blocks: Punjab, Haryana, Rajasthan have highest groundwater over-extraction

Water Conservation in India:

Jal Shakti Ministry (formed 2019, merged Jal Sansadhan + Drinking Water/Sanitation)
Jal Jeevan Mission: Functional household tap connections (FHTC) to all rural households; original target 2024, extended to December 2028 (Union Budget 2025-26); ~81% rural households covered as of 2026
AMRUT (Atal Mission for Rejuvenation and Urban Transformation): Urban water and sewerage
Pradhan Mantri Krishi Sinchayee Yojana (PMKSY): "Har Khet Ko Paani, More Crop Per Drop"
Atal Bhujal Yojana: Groundwater management in water-stressed areas (7 states)

Natural Vegetation and Wildlife

Explainer

India's Forest Cover (ISFR 2023 — India State of Forest Report):

Total forest and tree cover: 8,27,357 sq km = 25.17% of geographical area
Actual forest cover (excluding tree cover): 7,15,343 sq km = 21.76%
Target under Forest Policy 1988: 33% forest cover
States with highest forest cover: Madhya Pradesh, Arunachal Pradesh, Chhattisgarh, Odisha, Maharashtra
States with highest % forest cover: Mizoram (~85%), Arunachal Pradesh (~79%), Meghalaya (~76%)

Champion and Seth Classification (1936, revised): India's forest types classified into 16 major types and 221 sub-types. Major categories:

Tropical Wet Evergreen (Western Ghats, NE, Andaman)
Tropical Semi-Evergreen
Tropical Moist Deciduous (teak — most widespread valuable forest)
Tropical Dry Deciduous
Tropical Thorn Forests (Rajasthan, Gujarat)
Montane Subtropical
Himalayan Temperate (oak, rhododendron, deodar)
Alpine (above treeline — juniper, birch)

India's Biodiversity Hotspots (4 out of 36 global hotspots — CEPF official names):

Himalaya (full arc — NE India, Bhutan, Nepal, Pakistan; often incorrectly called "Eastern Himalayas" in older texts)
Western Ghats (Karnataka, Kerala, Tamil Nadu, Goa, Maharashtra) — sometimes listed as "Western Ghats + Sri Lanka"
Indo-Burma (NE India, Myanmar, parts of Indochina — remains "Indo-Burma"; NOT renamed; one of world's most threatened hotspots)
Sundaland (Nicobar Islands = India's portion; mostly Indonesia/Malaysia/Brunei)

Wildlife Conservation — Key Legislation:

Wildlife Protection Act, 1972: Schedules I-IV (I = highest protection — tiger, elephant, snow leopard, one-horned rhino); CITES species protection; creation of protected areas
Forest (Conservation) Act, 1980: Prior central government approval for diversion of forest land for non-forest purposes
Biological Diversity Act, 2002: National Biodiversity Authority (Chennai); access and benefit sharing; protection of traditional knowledge
Environment Protection Act, 1986: Umbrella legislation post-Bhopal gas tragedy

Exam Strategy

Prelims traps:

Black soil = Regur = formed from Deccan basalt; NOT from alluvium — do not confuse with alluvial
Laterite soil is acidic and leached — good for plantation crops (tea, coffee) NOT food grains
ISFR 2023: 25.17% total forest + tree cover; 21.76% actual forest cover — exam usually asks for the higher figure
India has 4 biodiversity hotspots, not 3 — remember Sundaland (Nicobar Islands)
Project Tiger (1973) — 58 Tiger Reserves (2025); tiger count ~3,682 (2022 census — latest); MP has most tigers (~785)
Project Elephant (1992) — 33 Elephant Reserves; elephant population 22,446 (DNA-based SAIEE census, Oct 2025; old visual count 29,964 in 2017 — the drop is methodological, not a real crash; Karnataka has most elephants ~6,013)
"Himalaya" NOT "Eastern Himalayas" — the correct CEPF hotspot name covering India's Himalayan region is simply "Himalaya"; "Eastern Himalayas" is a common but incorrect label used in older NCERT texts
UNCCD ≠ UNFCCC ≠ CBD — three different conventions; UNCCD is for desertification (adopted 1994)

Mains angles:

Land degradation → farmer distress → Mains GS3
Soil conservation methods → interlinkage with water conservation and agriculture
Biodiversity hotspots → Western Ghats panel/Gadgil Commission report controversy (GS3)
Project Tiger success story — model for conservation

Practice Questions

Prelims:

Which one of the following is the correct sequence of soil types found in India from north to south along the eastern coast?
(a) Alluvial, red, black, laterite
(b) Alluvial, red, laterite, black
(c) Red, alluvial, black, laterite
(d) Red, laterite, alluvial, black
Consider the following statements about India's biodiversity hotspots:
1. India has four of the world's 36 recognized biodiversity hotspots.
2. The Western Ghats and the Indo-Burma hotspot are among them.
  Which of the above statements is/are correct?
  (a) 1 only
  (b) 2 only
  (c) Both 1 and 2
  (d) Neither 1 nor 2

Mains:

What are the main causes of land degradation in India? Discuss the measures for its conservation with special reference to rainfed agriculture. (CSE Mains 2017, GS Paper 3, 15 marks)
How does the degradation of soil affect the productivity of agricultural land? Suggest measures to restore soil health. (CSE Mains 2022, GS Paper 3, 15 marks)

Chapter 2: Land, Soil, Water, Natural Vegetation and Wildlife Resources