Geography
Soils and Natural Vegetation
Forest Types of India
Natural vegetation of India for CGPSC: Champion and Seth forest types, rainfall zones, montane and mangrove forests, ISFR 2023 forest cover and Chhattisgarh.
Prerequisites
- Climate of India: rainfall and temperature decide the forest type
- Soil Types of India: forests and soils follow the same gradients
- Physiography of India: altitude zones of the Himalaya and the Ghats
The Hook: Sal in Bastar, Pine in Shimla, Mangrove in the Sundarbans
Connect
In Bastar and Surguja the dominant tree is sal (सरई), the state tree of Chhattisgarh. It drops much of its foliage in the hot weather and turns the forest floor brown. In Shimla, at about 2,000 m, the slopes carry evergreen deodar and pine. In the Sundarbans, trees stand in salt water on stilt roots.
All three are “Indian forests”. What decides which forest grows where, how does the official classification group them, and how much of India is actually under forest today?
Why it matters: Prelims asks rainfall ranges, typical trees, the location of each forest type, and the latest ISFR numbers. Mains GS-III asks about forest resources, their distribution and conservation, with Chhattisgarh as a natural example.
Natural Vegetation and Its Controls
Natural vegetation (प्राकृतिक वनस्पति) is the plant community that has grown without direct human help and adjusted to its environment over a long time. Forests are only one part of it; grasslands, scrub and alpine meadows are others.
| Control | Effect |
|---|---|
| Rainfall | The master factor on the plains and plateaus: evergreen above about 200 cm, deciduous at 70–200 cm, thorn below about 50 cm |
| Temperature and altitude | The master factor in the mountains: tropical → temperate → alpine as you climb |
| Soil | Mangroves on saline tidal mud, sundari in the delta, thorn scrub on sandy arid soil |
| Photoperiod and relief | Slope and aspect (sunny or shaded side) change the forest within a short distance |
The Official Classification: Champion and Seth (1968)
The forest-type classification used in India is H.G. Champion and S.K. Seth’s “A Revised Survey of the Forest Types of India” (1968), which revised Champion’s 1936 survey. It is still used by the Forest Survey of India (FSI).
- 16 type groups, subdivided into about 200 forest types.
- The 16 groups are commonly bunched into five major groups, which is how NCERT and most exam questions present them.
| # | Type groups (Champion and Seth) | Major group |
|---|---|---|
| 1–3 | Tropical wet evergreen; tropical semi-evergreen; tropical moist deciduous | Tropical moist |
| 4 | Littoral and swamp | Littoral and swamp |
| 5–7 | Tropical dry deciduous; tropical thorn; tropical dry evergreen | Tropical dry |
| 8–10 | Subtropical broad-leaved hill; subtropical pine; subtropical dry evergreen | Subtropical / montane |
| 11–13 | Montane wet temperate; Himalayan moist temperate; Himalayan dry temperate | Temperate / montane |
| 14–16 | Sub-alpine; moist alpine scrub; dry alpine scrub | Alpine |
The Five Major Forest Types (NCERT grouping)
1. Tropical evergreen and semi-evergreen forests (उष्णकटिबंधीय सदाबहार वन)
| Feature | Detail |
|---|---|
| Rainfall and temperature | More than about 200 cm; warm and humid all year (mean annual temperature above about 22°C) |
| Where | Western slopes of the Western Ghats, the north-east hills, the Andaman and Nicobar Islands |
| Character | Dense, multi-layered, tall trees (often 60 m or more); no fixed season of leaf fall, so the forest is green all year |
| Trees | Rosewood, mahogany, ebony, aini, rubber, cinchona; semi-evergreen: white cedar, hollock, kail |
| Note | Semi-evergreen forests are the transition to deciduous forests, in slightly less rainy areas |
2. Tropical deciduous (monsoon) forests (उष्णकटिबंधीय पर्णपाती / मानसूनी वन)
The most widespread forests of India. They shed their leaves for about six to eight weeks in the dry summer to save water. FSI’s forest-type mapping shows the tropical dry deciduous group as the largest single group by area, followed by tropical moist deciduous.
| Feature | Moist deciduous | Dry deciduous |
|---|---|---|
| Rainfall | 100–200 cm | 70–100 cm |
| Where | Foothills of the Himalaya (Shiwaliks, terai), the north-east, eastern slopes of the Western Ghats, Odisha, Jharkhand, Chhattisgarh | Rainier parts of the peninsular plateau, the plains of Uttar Pradesh and Bihar, parts of Madhya Pradesh |
| Trees | Teak, sal, shisham, hurra, mahua, amla, semul, kusum, sandalwood | Teak, tendu, palas, amaltas, bel, khair, axlewood |
| Note | Commercially the most valuable forests (teak and sal timber) | Grade into thorn scrub where rainfall falls further; widely cleared for farming |
3. Tropical thorn forests and scrub (उष्णकटिबंधीय कंटीले वन)
| Feature | Detail |
|---|---|
| Rainfall | Less than about 50 cm |
| Where | South-west Punjab, Haryana, Rajasthan, Gujarat, and the semi-arid parts of Madhya Pradesh, Uttar Pradesh and the Deccan |
| Character | Scattered trees, long roots, thick fleshy stems, small or thorny leaves to cut water loss; grasses and tussocks in the gaps |
| Trees | Babool, ber, wild date palm, khair, neem, khejri, palas; acacias, euphorbias, cacti |
4. Montane forests (पर्वतीय वन)
Himalaya: forest changes with altitude (bands are approximate and vary with slope and latitude):
flowchart BT
A["Foothills, below about 1,000 m
Tropical moist deciduous (sal)"] --> B["About 1,000–2,000 m
Wet temperate broad-leaved:
oak, chestnut"]
B --> C["About 1,500–3,000 m
Temperate conifers:
chir pine, deodar, silver fir, spruce, cedar"]
C --> D["Above about 3,600 m
Alpine: silver fir, juniper, birch,
then alpine meadows (bugyal, marg)"]
D --> E["Tundra-like scrub, mosses, lichens
up to the snow line"]- Alpine pastures are used by transhumant herders such as the Gujjars and Bakarwals (Jammu and Kashmir) and the Gaddis (Himachal Pradesh).
- Southern montane forests grow in the Nilgiri, Anaimalai and Palani hills. The temperate patches in sheltered valleys, with grassland on the slopes, are called shola (शोला) forests. Eucalyptus and wattle plantations have replaced parts of them.
5. Littoral and swamp forests: mangroves (तटीय एवं दलदली वन)
| Feature | Detail |
|---|---|
| Where | Tidal creeks and deltas: Sundarbans (Ganga–Brahmaputra delta, West Bengal), Bhitarkanika (Odisha), the Mahanadi, Godavari and Krishna deltas, Pichavaram (Tamil Nadu), the Gulf of Kachchh, the Andaman and Nicobar Islands |
| Adaptation | Stilt roots for support; pneumatophores (breathing roots) because the mud lacks oxygen; salt tolerance; seeds that germinate on the tree (vivipary) |
| Typical tree | Sundari (Heritiera fomes), which gives the Sundarbans its name |
| Cover (ISFR 2023) | 4,991.68 sq km, about 0.15% of India’s area; West Bengal has the largest mangrove cover |
| Value | Breakwater against cyclones and storm surge; fish and crab nurseries; carbon sink |
How Much Forest Does India Have? (ISFR 2023)
The India State of Forest Report (ISFR) is published every two years by the Forest Survey of India (भारतीय वन सर्वेक्षण), Dehradun, from satellite data. ISFR 2023, the 18th edition, was released on 21 December 2024 and is the latest edition used here (as of October 2026).
Definitions
| Term | Meaning |
|---|---|
| Forest cover (वनावरण) | All land of more than 1 hectare with tree canopy density above 10%, whatever its ownership or legal status |
| Tree cover | Tree patches outside recorded forest smaller than 1 hectare |
| Recorded forest area (अभिलिखित वन क्षेत्र) | Land recorded as forest in government records: reserved, protected and unclassed forests |
| Very dense / moderately dense / open | Canopy 70% and above / 40% to below 70% / 10% to below 40% |
| Scrub | Canopy below 10%: not counted as forest cover |
Headline figures (ISFR 2023)
| Indicator | Figure |
|---|---|
| Forest cover | 7,15,343 sq km = 21.76% of geographical area |
| Tree cover | 3.41% |
| Forest + tree cover | 8,27,357 sq km = 25.17% (24.62% in ISFR 2021) |
| Largest forest cover by area | Madhya Pradesh (77,073 sq km) > Arunachal Pradesh (65,882) > Chhattisgarh (55,812) |
| Largest forest + tree cover by area | Madhya Pradesh > Arunachal Pradesh > Maharashtra |
| Highest forest cover as % of area | Lakshadweep (91.33%) > Mizoram (85.34%) > Andaman and Nicobar Islands (81.62%) |
| Largest increase in forest + tree cover | Chhattisgarh (+684 sq km), then Uttar Pradesh and Odisha (559 each) and Rajasthan (394) |
| Mangrove cover | 4,991.68 sq km (0.15%) |
The policy benchmark
The National Forest Policy, 1988 set the goal of bringing one-third (33%) of India’s geographical area under forest or tree cover, and two-thirds of the area in the hills and mountains. At 25.17% (ISFR 2023), India is still short of the national goal.
Legal and policy framework (for Mains)
| Instrument | Key point |
|---|---|
| Indian Forest Act, 1927 | Legal categories: reserved (most protected), protected, and village forests |
| Forest (Conservation) Act, 1980 | Central approval needed to divert forest land for non-forest use. Renamed the Van (Sanrakshan Evam Samvardhan) Adhiniyam, 1980 by the 2023 amendment |
| 42nd Amendment, 1976 | Moved “forests” from the State List to the Concurrent List; added Art 48A (DPSP) and Art 51A(g) (Fundamental Duty) |
| National Forest Policy, 1988 | 33% target; people’s participation; led to Joint Forest Management (1990) |
| Forest Rights Act, 2006 | Individual and community forest rights of Scheduled Tribes and other traditional forest dwellers |
| Green India Mission | One of the eight missions of the National Action Plan on Climate Change: restore and increase forest cover |
Chhattisgarh Angle
| Fact | Detail |
|---|---|
| Forest cover | 55,811.75 sq km, about 41.3% of the state’s 1,35,192 sq km (ISFR 2023); 3rd in India by area |
| Recorded forest area | About 44% of the state (ISFR 2021), larger than forest cover |
| Type groups present | Tropical moist deciduous (sal belts), tropical dry deciduous (teak and mixed forests), and subtropical broad-leaved hill forests in small high-altitude patches |
| State tree | Sal (Shorea robusta), locally sarai (सरई); the state has some of India’s finest sal forests |
| Main forest blocks | North: Surguja–Jashpur–Korba, including Hasdeo Arand. South: Bastar plateau and the Dandakaranya hills |
| Forest economy | Tendu leaves, mahua, sal seed, lac, tamarind and other minor forest produce |
Details, national parks and forest policy for the state are in Forests and Wildlife of Chhattisgarh and Forest Types and Forest Cover of Chhattisgarh.
Analysis: Forests as a Resource (Mains material)
- Ecological services: forests hold soil, recharge groundwater, regulate the flow of rivers such as the Mahanadi, store carbon and shelter biodiversity. They are the first line of defence against the erosion discussed in Soil Erosion and Conservation.
- Livelihoods: for tribal and forest-fringe communities, minor forest produce, fuel and fodder are a core income. In Chhattisgarh, tendu and mahua collection reaches lakhs of households.
- Pressures: diversion for mining, dams and roads; fire; grazing; invasive weeds such as lantana; degradation of dense forest into open forest even where total cover is stable.
- Quality versus quantity: recent gains come largely from plantations and trees outside forests (agroforestry, farm bunds). These help, but do not replace old natural forests in biodiversity or carbon.
- Way forward: community forest rights and joint management; restoration of degraded forest rather than monoculture plantations; fire management; compensatory afforestation of real quality; using agroforestry to reach the 33% goal.
Memory Tricks
Rainfall ladder: '200 Ever, 100 Moist, 70 Dry, 50 Thorn'
Above 200 cm: evergreen. 100–200 cm: moist deciduous. 70–100 cm: dry deciduous. Below about 50 cm: thorn.
Champion and Seth: '1968, 16, 200'
1968 revised survey · 16 type groups · about 200 types. Five major groups in NCERT: Evergreen, Deciduous, Thorn, Montane, Littoral, “Every Deer Travels Many Leagues”.
ISFR 2023 in four numbers: 21.76 · 3.41 · 25.17 · 33
Forest 21.76% + tree 3.41% = 25.17%, against the policy goal of 33%. Top three by forest area: Madhya Pradesh, Arunachal, Chhattisgarh: “MAC”.
Don’t Confuse
| This | vs | That |
|---|---|---|
| Forest cover: satellite canopy above 10%, more than 1 ha | vs | Recorded forest area: legal status in records |
| Moist deciduous (100–200 cm): sal, teak | vs | Dry deciduous (70–100 cm): teak, tendu, palas |
| Tropical evergreen: Western Ghats (west slopes), north-east | vs | Tropical dry evergreen: a Champion–Seth group of the Tamil Nadu coast |
| Shola: southern montane forest (Nilgiri) | vs | Bugyal / marg: alpine meadows of the Himalaya |
| Largest forest cover by area: MP, Arunachal, Chhattisgarh | vs | Largest forest + tree cover: MP, Arunachal, Maharashtra |
| Highest % forest cover: Lakshadweep, Mizoram | vs | Largest forest area: Madhya Pradesh |
| Sundari: Sundarbans mangrove | vs | Sal: moist deciduous; Chhattisgarh state tree |
Common Mistakes
MCQ traps
- “Tropical evergreen forests are the most widespread in India.” Wrong. Tropical deciduous (monsoon) forests are; the dry deciduous group is the largest single group.
- “Deodar is a tropical tree.” It is a temperate conifer of the Himalaya at roughly 1,500–3,000 m.
- “Chhattisgarh is 2nd in forest cover.” In ISFR 2023 it is 3rd by forest cover area. Its distinction is the largest increase in forest + tree cover (684 sq km), not in forest cover alone.
- “India has 33% forest cover.” 33% is the policy goal. Actual forest + tree cover is 25.17% (ISFR 2023).
- “Scrub counts as open forest.” Scrub (canopy below 10%) is not forest cover.
- “Forests have always been in the Concurrent List.” They moved from the State List by the 42nd Amendment (1976).
Practice
All questions below are original practice questions written in CGPSC style. They are not previous-year questions.
Level 1: Foundation
- Tropical moist deciduous forests grow where annual rainfall is between ______ and ______ cm.
- The forest-type classification used by the Forest Survey of India was published by Champion and Seth in ______.
- The temperate forests of the Nilgiri hills are called ______.
Answers
- 100 and 200 cm.
- 1968.
- Shola forests.
Level 2: Prelims MCQs
Q1. Consider the following statements about the India State of Forest Report (ISFR) 2023:
- Forest and tree cover together account for about one-fourth of India’s geographical area.
- Chhattisgarh ranks second among states in forest cover by area.
- Chhattisgarh recorded the largest increase in forest and tree cover among states.
Which of the statements given above is/are correct?
- (a) 1 only
- (b) 1 and 3 only
- (c) 2 and 3 only
- (d) 1, 2 and 3
Answer and explanation
(b) 1 and 3 only. Forest plus tree cover is 25.17% (about one-fourth), and Chhattisgarh’s forest plus tree cover rose by 684 sq km, the most of any state. Statement 2 is wrong: Chhattisgarh is third by forest cover area, after Madhya Pradesh and Arunachal Pradesh.
Q2. Match List I (Forest type) with List II (Typical tree):
| List I | List II |
|---|---|
| A. Tropical evergreen | 1. Khejri |
| B. Tropical moist deciduous | 2. Deodar |
| C. Tropical thorn | 3. Ebony |
| D. Himalayan temperate | 4. Sal |
- (a) A-3, B-4, C-2, D-1
- (b) A-4, B-3, C-1, D-2
- (c) A-3, B-1, C-4, D-2
- (d) A-3, B-4, C-1, D-2
Answer and explanation
(d) A-3, B-4, C-1, D-2. Ebony grows in wet evergreen forests, sal is the classic moist deciduous tree, khejri is a drought-hardy tree of the Rajasthan thorn forests, and deodar is a temperate Himalayan conifer.
Q3. Which of the following forest types covers the largest area in India?
- (a) Tropical wet evergreen
- (b) Tropical dry deciduous
- (c) Montane wet temperate
- (d) Littoral and swamp
Answer and explanation
(b) Tropical dry deciduous. It covers much of the peninsular plateau and the plains with 70–100 cm of rainfall, and is the largest single type group in FSI’s mapping, followed by tropical moist deciduous. Together the deciduous forests are called monsoon forests.
Q4. Under the Forest Survey of India’s definitions, a forest patch with a tree canopy density of 55% is classified as:
- (a) Very dense forest
- (b) Open forest
- (c) Moderately dense forest
- (d) Scrub
Answer and explanation
(c) Moderately dense forest. The classes are: very dense, 70% and above; moderately dense, 40% to below 70%; open, 10% to below 40%; scrub, below 10% and not counted as forest cover.
Q5. Pneumatophores (breathing roots) and vivipary are adaptations typical of:
- (a) Tropical thorn forests
- (b) Alpine scrub
- (c) Mangrove forests
- (d) Tropical dry deciduous forests
Answer and explanation
(c) Mangrove forests. Tidal mud lacks oxygen, so mangroves send up breathing roots, and seeds germinate on the parent tree before dropping into the water. The Sundarbans (West Bengal) holds India’s largest mangrove area.
Level 3: Mains Answer Writing
Q1. (60 words) Distinguish between “forest cover” and “recorded forest area”, with Chhattisgarh as an example.
Model answer outline
- Forest cover: satellite-measured; all land above 1 ha with canopy over 10%, regardless of ownership.
- Recorded forest area: land legally recorded as reserved, protected or unclassed forest, whether or not it is tree-covered.
- Chhattisgarh: forest cover about 41.3% (ISFR 2023) is less than recorded forest about 44% (ISFR 2021), showing some recorded forest is degraded or blank.
Q2. (150–200 words) Describe the distribution of tropical deciduous forests in India. Why are they important for Chhattisgarh?
Model answer outline
- Intro: Tropical deciduous (monsoon) forests are India’s most widespread forests, shedding leaves in the dry summer.
- Body:
- Moist deciduous (100–200 cm): Himalayan foothills, north-east, eastern Western Ghats, Odisha, Jharkhand, Chhattisgarh; sal, teak, mahua, kusum.
- Dry deciduous (70–100 cm): rest of the peninsular plateau and the UP–Bihar plains; teak, tendu, palas, khair; the largest single type group.
- Commercially the most valuable forests; heavily cleared for farming.
- Chhattisgarh angle: about 41% forest cover (ISFR 2023), 3rd in India by area; sal belts of Bastar and Surguja; tendu, mahua and sal seed sustain tribal incomes; forests protect thin plateau soils and the Mahanadi and Hasdeo catchments.
- Challenges: mining diversion (Hasdeo Arand), fire, grazing, degradation of dense forest.
- Conclusion: community forest rights and scientific management can keep these forests both productive and intact.
Quick Revision Table
| Fact | Detail |
|---|---|
| Classification | Champion and Seth, 1968; 16 type groups, about 200 types |
| Evergreen | Above about 200 cm; Western Ghats (west), NE, A&N; ebony, mahogany, rosewood |
| Moist deciduous | 100–200 cm; sal, teak, mahua; includes Chhattisgarh |
| Dry deciduous | 70–100 cm; teak, tendu, palas; largest group by area |
| Thorn | Below about 50 cm; babool, khejri, ber |
| Montane | Oak and chestnut → pine, deodar, fir → alpine; shola in the Nilgiris |
| Mangroves | 4,991.68 sq km, 0.15% (ISFR 2023); West Bengal largest; sundari |
| ISFR 2023 | Forest 21.76%, tree 3.41%, total 25.17%; released 21 Dec 2024 |
| Top by forest area | MP > Arunachal > Chhattisgarh |
| Highest % | Lakshadweep 91.33%, Mizoram 85.34% |
| Policy goal | 33% (NFP 1988); two-thirds in hills |
| Chhattisgarh | 55,811.75 sq km, about 41.3%; +684 sq km forest + tree cover (highest) |
Key Takeaways
Key Takeaways
- Rainfall decides forest type on the plains (evergreen, moist deciduous, dry deciduous, thorn); altitude decides it in the mountains.
- Champion and Seth (1968): 16 type groups, about 200 types; tropical deciduous forests dominate India.
- ISFR 2023: forest cover 21.76%, forest + tree cover 25.17%, short of the 33% goal.
- Chhattisgarh is 3rd by forest cover area (about 41%) and had the largest gain in forest + tree cover (684 sq km).
- Mangroves (0.15% of India) are small in area but vital as cyclone buffers and carbon sinks.
What’s Next
- Soils and Natural Vegetation: Quick Revision
- Forests and Wildlife of Chhattisgarh: national parks, tiger reserves, forest policy
- Biodiversity and Conservation: hotspots and in-situ conservation
- Environment and Ecology: ecosystems and climate change
- Agriculture of India: the next chapter
Advertisement