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Complete Geography — Physical, Indian, Human — Landforms, Climate, Resources, Population, Industries, Map Work.
| Event | Date | Position of Sun | Day Length (N Hemisphere) | Day Length (S Hemisphere) |
|---|---|---|---|---|
| Summer Solstice | June 21 | Tropic of Cancer (23½°N) | Longest day | Shortest day |
| Winter Solstice | December 22 | Tropic of Capricorn (23½°S) | Shortest day | Longest day |
| Vernal Equinox | March 21 | Equator (0°) | Equal (12h) | Equal (12h) |
| Autumnal Equinox | September 23 | Equator (0°) | Equal (12h) | Equal (12h) |
| Latitude/Longitude | Value | Significance |
|---|---|---|
| Equator | 0° | Largest latitude; divides earth into N & S hemispheres |
| Tropic of Cancer | 23½°N | Sun is overhead on June 21; limit of N tropical zone |
| Tropic of Capricorn | 23½°S | Sun is overhead on Dec 22; limit of S tropical zone |
| Arctic Circle | 66½°N | Limit of N polar region; midnight sun in summer |
| Antarctic Circle | 66½°S | Limit of S polar region; midnight sun in S summer |
| Prime Meridian | 0° (Greenwich) | Reference for longitude; divides E & W hemispheres |
| International Date Line | 180° | Changes calendar date; zigzags to avoid land masses |
| Layer | Depth (km) | State | Composition | Density | Key Facts |
|---|---|---|---|---|---|
| Crust (Continental) | 0–40 | Solid | Silica (Si) + Alumina (Al) — SIAL | 2.7 g/cm³ | Thicker (30–40 km); lighter; granitic rocks |
| Crust (Oceanic) | 0–7 | Solid | Silica (Si) + Magnesium (Mg) — SIMA | 3.0 g/cm³ | Thinner (5–7 km); denser; basaltic rocks |
| Upper Mantle | 40–670 | Solid (asthenosphere partially molten) | Iron + Magnesium silicates | 3.4–4.4 g/cm³ | Contains asthenosphere (plastic zone) — source of magma |
| Lower Mantle (Mesosphere) | 670–2,900 | Solid | Silicates of Mg & Fe | 4.4–5.6 g/cm³ | High pressure; slow convection currents |
| Outer Core | 2,900–5,150 | Liquid | Iron + Nickel (NIFE) | 9.9–12.2 g/cm³ | Responsible for earth's magnetic field; convection generates field |
| Inner Core | 5,150–6,371 | Solid | Iron + Nickel | 12.8–13.1 g/cm³ | Despite extreme heat (~6000°C), solid due to immense pressure |
| Boundary Type | Motion | Features Formed | Examples |
|---|---|---|---|
| Divergent (Constructive) | Plates move apart | Mid-ocean ridges, rift valleys, new crust | Mid-Atlantic Ridge, East African Rift |
| Convergent (Destructive) | Plates collide | Trenches, fold mountains, volcanic arcs, subduction zones | Himalayas, Andes, Japan Trench |
| Transform (Conservative) | Plates slide past each other | Faults, earthquakes, no volcanic activity | San Andreas Fault (California) |
| Rock Type | Formation | Characteristics | Examples | Uses |
|---|---|---|---|---|
| Igneous (Primary) | Cooling & solidification of magma/lava | Hard, crystalline, no fossils, no layers | Granite, Basalt, Gabbro, Pumice, Obsidian | Granite → building; Basalt → roads; Pumice → abrasive |
| Sedimentary (Secondary) | Lithification (compaction + cementation) of sediments | Layered (strata), contain fossils, softer, porous | Sandstone, Limestone, Shale, Coal, Chalk | Limestone → cement; Coal → fuel; Sandstone → building |
| Metamorphic | Heat + pressure on existing rocks (igneous or sedimentary) | Harder, banded/foliated, recrystallized, no fossils | Marble (← limestone), Slate (← shale), Quartzite (← sandstone), Diamond (← coal) | Marble → flooring; Slate → roofing |
| Course | Dominant Work | Landforms Formed | Features |
|---|---|---|---|
| Upper (Mountain/Hill) | Erosion (vertical/downcutting) | V-shaped valley, gorge, waterfall, rapids, interlocking spurs | Fast-flowing, steep gradient, narrow channel |
| Middle (Plain) | Erosion + Transportation | Meanders, oxbow lakes, river cliffs, slip-off slopes | Moderate velocity, wider channel |
| Lower (Plain/Delta) | Deposition | Floodplain, levees, delta, distributaries, estuary, natural levees | Slow velocity, very wide channel, gentle gradient |
| Gas | Percentage by Volume | Role |
|---|---|---|
| Nitrogen (N₂) | 78.08% | Most abundant; dilutes oxygen; essential for plant growth (nitrogen fixation) |
| Oxygen (O₂) | 20.95% | Essential for respiration; combustion; ozone layer (O₃) in stratosphere |
| Argon (Ar) | 0.93% | Inert gas; used in welding and light bulbs |
| Carbon Dioxide (CO₂) | 0.04% | Greenhouse gas; essential for photosynthesis; absorbs IR radiation |
| Neon, Helium, others | Trace | Neon in signs; Helium in balloons; varies with altitude |
| Water Vapour (H₂O) | 0–4% (variable) | Vital for cloud formation, precipitation, greenhouse effect |
| Dust particles | Variable | Act as hygroscopic nuclei for condensation of water vapour |
| Layer | Height Range | Temperature | Key Features |
|---|---|---|---|
| Troposphere | 0–12 km | Decreases with height (~6.5°C/km) | Contains 75% of atmospheric mass; all weather phenomena; clouds, rain, storms; tropopause at top |
| Stratosphere | 12–50 km | Increases with height (due to ozone absorbing UV) | Contains ozone layer (O₃) at 20–35 km; protects from UV radiation; jet aircraft fly here; stratopause at top |
| Mesosphere | 50–80 km | Decreases with height; coldest layer (~−90°C) | Meteors burn up here (shooting stars); mesopause at top |
| Thermosphere | 80–700 km | Increases sharply (up to 1,500°C) | Ionosphere (ionized layer); reflects radio waves; auroras occur; ISS orbits here |
| Exosphere | 700–10,000 km | Very high but low density | Outermost layer; merges with space; very few gas molecules; satellites orbit here |
| Pressure Belt | Latitude | Nature | Cause | Wind Belt Associated |
|---|---|---|---|---|
| Equatorial Low (Doldrums/ITCZ) | 0–5° | Low pressure | Intense heating, strong convection, ascending air | Calm, light variable winds, heavy rainfall |
| Subtropical High (Horse Latitudes) | 30°N & 30°S | High pressure | Descending air from Hadley cell; air cools and subsides | Calm, light winds; hot deserts found here (Sahara, Thar) |
| Subpolar Low | 60°N & 60°S | Low pressure | Convergence of warm & cold air; cyclonic activity | Variable winds, precipitation (westerlies meet polar easterlies) |
| Polar High | 90°N & 90°S | High pressure | Extreme cold, dense descending air | Polar easterlies; very cold and dry |
| Wind System | Latitude Range | Direction | Characteristics |
|---|---|---|---|
| Trade Winds (Easterlies) | 0–30°N & 0–30°S | NE in NH, SE in SH (blow from subtropical high to equatorial low) | Deflected W by Coriolis; steady, reliable; helped early sailors; moisture lost over land |
| Westerlies | 30–60°N & 30–60°S | SW in NH, NW in SH (blow from subtropical high to subpolar low) | Variable; bring rain to W. Europe (after crossing Atlantic); stormy in SH (Roaring Forties) |
| Polar Easterlies | 60–90°N & 60–90°S | NE in NH, SE in SH (blow from polar high to subpolar low) | Cold, dry winds; deflected by Coriolis; meet westerlies at subpolar low |
| Local Winds | Various | Various | Chinook (warm, dry, downslope — Rockies), Mistral (cold — France), Harmattan (dry, dusty — W. Africa), Loo (hot — N. India summer), Foehn (warm, dry — Alps) |
| Type | Mechanism | Conditions | Examples |
|---|---|---|---|
| Convectional | Warm air rises, cools, condenses | Intense heating → strong vertical currents; common in equatorial regions | Afternoon thunderstorms in tropical regions; Kalahari |
| Orographic | Moist air forced to rise over mountains; cools & condenses on windward side | Windward side = heavy rain (relief rain); leeward side = rain shadow | Cherrapunji (wettest) on windward side of Khasi hills; Tibetan plateau = rain shadow |
| Cyclonic (Frontal) | Warm & cold air masses meet; warm air rises over cold air along a front | Along fronts in mid-latitudes and tropical cyclones | Monsoon rainfall in India; winter rain in Mediterranean |
| Climate Type | Köppen Code | Location | Temperature & Rainfall | Vegetation |
|---|---|---|---|---|
| Tropical Wet | Af | Near equator (Amazon, Congo, Indonesia) | Hot (25–27°C) all year; rainfall >200 cm | Tropical evergreen forest |
| Tropical Monsoon | Am/Aw | India, SE Asia, W. Africa | Hot; distinct wet & dry seasons; ~150–200 cm | Tropical deciduous forest |
| Tropical Savanna | Aw | Between tropical wet & semi-arid | Hot; short wet season; tall grass with scattered trees | Savanna grassland (Sudan type) |
| Subtropical Desert | BWh/BWk | 20–30°N & S (Sahara, Arabian, Thar) | Very hot days, cool nights; rainfall <25 cm | Scanty xerophytic vegetation (cactus) |
| Mediterranean | Csa/Csb | 30–45° on W coasts (around Mediterranean) | Warm dry summers, mild wet winters; ~50–75 cm | Sclerophyllous (hard-leaved) forest, citrus fruits |
| Humid Subtropical | Cfa | 25–40° on E coasts (SE China, SE USA) | Hot humid summers, mild winters; ~100–150 cm | Mixed forest (deciduous + evergreen) |
| Marine West Coast | Cfb/Cfc | 40–60° on W coasts (W. Europe, NZ) | Cool summers, mild winters; rainfall year-round; cloudy | Coniferous & deciduous mixed forest |
| Continental | Dfa/Dfb/Dfc | 40–70° in interiors (central Russia, Canada) | Hot summers, very cold winters; moderate rainfall | Taiga (coniferous forest) in north; grassland in south |
| Tundra | ET | Arctic region (North Canada, Siberia) | Very cold (−30°C to 10°C); permafrost; low rainfall | Mosses, lichens, dwarf shrubs; no trees |
| Ice Cap | EF | Antarctica, Greenland | Permanently below 0°C; snow & ice cover | No vegetation |
| Feature | Tropical Cyclone | Temperate Cyclone |
|---|---|---|
| Location | Tropical oceans (Bay of Bengal, Arabian Sea, Caribbean) | Mid-latitudes (40–60° N & S) |
| Source region | ITCZ; warm oceans (>27°C) | Polar front (convergence of warm tropical & cold polar air) |
| Size | Smaller (200–500 km diameter) | Larger (500–3,000 km diameter) |
| Wind speed | Very high (120–300 km/h) | Moderate (30–100 km/h) |
| Shape | Circular; well-defined eye at center | Elliptical; no eye |
| Season | Post-monsoon (Oct–Dec) in India; summer in Atlantic | Winter season; move W to E (guided by westerlies) |
| Duration | Shorter (3–7 days) | Longer (few days to a week) |
| Rainfall | Very heavy, torrential; causes flooding | Moderate to heavy; widespread |
| Damage | Extremely destructive (wind + rain + storm surge) | Less destructive; mainly affects shipping |
| Naming | Hurricane (Atlantic), Typhoon (W. Pacific), Cyclone (Indian Ocean) | Mid-latitude cyclone, Extra-tropical cyclone, Temperate cyclone |
| Ocean | Area (million km²) | Average Depth (m) | Deepest Point | Key Features |
|---|---|---|---|---|
| Pacific | 165.25 | 4,280 | Mariana Trench (10,994 m) | Largest & deepest ocean; Ring of Fire; ~46% water surface |
| Atlantic | 106.46 | 3,646 | Puerto Rico Trench (8,376 m) | S-shaped; 2nd largest; Mid-Atlantic Ridge divides it |
| Indian | 70.56 | 3,741 | Java Trench (7,450 m) | 3rd largest; warmest ocean; monsoon winds dominant |
| Southern (Antarctic) | 21.96 | 3,270 | South Sandwich Trench (7,235 m) | Around Antarctica; Circumpolar Current |
| Arctic | 14.06 | 1,205 | Molloy Deep (5,550 m) | Smallest; mostly frozen; Bering Strait connects to Pacific |
| Current | Type | Region | Effect |
|---|---|---|---|
| Gulf Stream | Warm | N. Atlantic (Gulf of Mexico → N. Europe) | Keeps W. Europe (UK, Norway) warm despite high latitude; prevents ice-free ports in winter |
| Labrador Current | Cold | N. Atlantic (Arctic → E. Canada) | Brings cold water, icebergs to E. Canada; meeting with Gulf Stream causes fog near Newfoundland |
| Kuroshio Current | Warm | N. Pacific (Philippines → Japan) | Warm current; brings rain to Japan; meeting with Oyashio creates rich fishing grounds |
| Oyashio Current | Cold | N. Pacific (Bering Sea → Japan) | Cold current; meeting with Kuroshio near Japan creates fog and rich fisheries |
| Canary Current | Cold | N. Atlantic (off W. Africa) | Causes aridity in Sahara; brings cold water to Canary Islands |
| Benguela Current | Cold | S. Atlantic (off W. Africa, Namibia) | Creates Namib Desert; upwelling brings nutrients; rich fishing grounds |
| Peru (Humboldt) Current | Cold | S. Pacific (off W. S. America) | Creates Atacama Desert; upwelling → world's richest fishing grounds; El Niño disrupts it |
| North Atlantic Drift | Warm | N. Atlantic (continuation of Gulf Stream) | Extension of Gulf Stream; keeps NW Europe unusually warm for its latitude |
| West Australian Current | Cold | Indian Ocean (off W. Australia) | Brings cool conditions to W. Australia; reduces rainfall |
| Mozambique / Agulhas Current | Warm | Indian Ocean (E. Africa → S. tip of Africa) | Warm current; merges with Brazil Current in S. Atlantic; keeps SE Africa warm |
| Division | Sub-division | Key Features | Area % |
|---|---|---|---|
| 1. Himalayan Mountains | Greater Himalaya (Himadri), Middle Himalaya (Himachal), Outer Himalaya (Shiwalik) | Young fold mountains; 2,400 km long, 160–400 km wide; source of major rivers | ~10% |
| 2. Northern Plains | Bhabar, Terai, Bhangar, Khadar | Alluvial plains formed by Indus, Ganga, Brahmaputra; very fertile; 240–320 km wide | ~14% |
| 3. Peninsular Plateau | Deccan Plateau, Chota Nagpur Plateau | Tableland; older than Himalayas; triangular shape; broad & shallow valleys | ~43% |
| 4. Coastal Plains | Eastern Coastal Plain, Western Coastal Plain | Eastern: wider, formed by deltaic deposits; Western: narrower, lagoons & backwaters | ~6% |
| 5. Islands | Andaman & Nicobar (Bay of Bengal), Lakshadweep (Arabian Sea) | Andaman: volcanic origin; Lakshadweep: coral origin | ~0.3% |
| Range | Also Called | Height | Key Features & Peaks |
|---|---|---|---|
| Greater Himalaya (Himadri) | Inner Himalaya | Above 5,000 m | Highest range; perennially snow-clad; peaks: Everest (8,848 m), Kanchenjunga (8,586 m), Nanda Devi (7,817 m); composed of granite & gneiss |
| Middle Himalaya (Himachal) | Lesser Himalaya | 3,700–4,500 m | Pir Panjal, Dhaula Dhar, Mahabharat ranges; famous hill stations: Shimla, Darjeeling, Mussoorie; composed of sedimentary & metamorphic rocks |
| Outer Himalaya (Shiwalik) | Sub-Himalaya | 900–1,100 m | Lowest range; widest (in HP & UP); formed from sedimentary deposits of rivers; known as Duars & Bhabar |
| Belt | Position | Characteristics |
|---|---|---|
| Bhabar | At the foothills of Shiwaliks | Narrow belt (8–16 km); pebbles & boulders deposited by rivers; rivers disappear into ground; porous |
| Terai | South of Bhabar | Wet, swampy; rivers reappear; thick forests; wild animals; coarse alluvial soil |
| Bhangar | Older alluvial plain above flood level | Contains calcareous deposits called 'kankar'; less fertile; found at higher elevations |
| Khadar | Newer alluvial plain; flood-prone | Renewed every year by flood deposits; very fertile; ideal for agriculture; low-lying near river banks |
| River | Source | Length (km) | Tributaries | Mouth |
|---|---|---|---|---|
| Indus | Sengge Zangbo (Tibet) near Mansarovar | 2,880 (in India: 709) | Jhelum, Chenab, Ravi, Beas, Sutlej | Arabian Sea (Pakistan) |
| Ganga | Gangotri Glacier (Uttarakhand) | 2,525 | Yamuna, Ghaghara, Gandak, Kosi (left); Son, Gomti (right); Hooghly distributary | Bay of Bengal (Ganga Sagar) |
| Brahmaputra | Angsi Glacier (Tibet) as Tsangpo | 2,900 (in India: 916) | Dibang, Lohit, Subansiri (left); Manas (right); in Bangladesh: Jamuna, joins Ganga → Meghna | Bay of Bengal (Bangladesh) |
| River | Source | Length (km) | Direction | Mouth |
|---|---|---|---|---|
| Godavari | Trimbakeshwar (Maharashtra) | 1,465 | E-flowing | Bay of Bengal — largest peninsular river ("Dakshin Ganga") |
| Krishna | Mahabaleshwar (Maharashtra) | 1,401 | E-flowing | Bay of Bengal — flows through MH, KA, AP, TS |
| Kaveri (Cauvery) | Brahmagiri Hills (Karnataka) | 805 | E-flowing | Bay of Bengal — forms Sivasamudram falls; irrigates TN delta |
| Mahanadi | Chhattisgarh Plateau | 851 | E-flowing | Bay of Bengal — flows through Chhattisgarh, Odisha |
| Narmada | Amarkantak (MP) | 1,312 | W-flowing (flows in rift valley between Vindhya & Satpura) | Arabian Sea — forms Dhuan Dhar (Jabalpur) falls |
| Tapi (Tapti) | Betul (MP) | 724 | W-flowing (flows in rift valley) | Arabian Sea — flows parallel to Narmada |
| Lake | State | Type | Significance |
|---|---|---|---|
| Wular Lake | Jammu & Kashmir | Freshwater (tectonic) | Largest freshwater lake in India |
| Chilika Lake | Odisha | Brackish water (lagoon) | Largest lagoon in India (brackish water); Ramsar site; migratory birds |
| Sambhar Lake | Rajasthan | Salt water (endogenic) | Largest saltwater lake in India; salt production |
| Vembanad Lake | Kerala | Backwater (lagoon) | Longest lake in India; Kerala backwaters; famous houseboats |
| Pulicat Lake | AP / Tamil Nadu | Brackish water (lagoon) | Second largest lagoon in India |
| Loktak Lake | Manipur | Freshwater | Largest freshwater lake in NE India; phumdis (floating vegetation); Keibul Lamjao (floating national park) |
| Dal Lake | Jammu & Kashmir | Freshwater | Famous houseboats; "Srinagar's jewel"; Mughal gardens |
| Lonar Lake | Maharashtra | Crater lake (volcanic) | Created by meteorite impact; saline |
| Nainital Lake | Uttarakhand | Freshwater (tectonic) | Eye-shaped; popular hill station |
| Gurudongmar Lake | Sikkim | Freshwater (glacial) | One of the highest lakes in the world (~17,100 ft); sacred to Buddhists |
| Pass | State/Region | Connects | Significance |
|---|---|---|---|
| Shipki La | Himachal Pradesh | HP and Tibet | Indo-Tibet trade route on Satluj river |
| Nathu La | Sikkim | Sikkim and Tibet | Part of ancient Silk Route; reopened 2006 for trade |
| Jelep La | Sikkim | Sikkim and Lhasa (Tibet) | Trade route between India and China |
| Rohtang Pass | Himachal Pradesh | Kullu Valley and Lahaul & Spiti | Connects Kullu to Leh; 3,978 m on Manali-Leh highway |
| Bara-Lacha La | Himachal Pradesh | Lahaul & Spiti and Ladakh | On Manali-Leh highway; 4,890 m high |
| Zoji La | Jammu & Kashmir | Kashmir Valley and Ladakh | On Srinagar-Leh highway; closed in winter due to snow |
| Banihal Pass | Jammu & Kashmir | Jammu and Kashmir Valley | Jawahar Tunnel passes through; on NH 44 |
| Khardung La | Ladakh | Leh and Nubra Valley | One of highest motorable passes (5,359 m); on Siachen route |
| Chang La | Ladakh | Leh and Pangong Lake | Third highest motorable pass (5,360 m) |
| Pensi La | Ladakh | Suru Valley and Zanskar | Gateway to Zanskar; 4,400 m |
| Country | Border States (India) | Length (km) | Key Features |
|---|---|---|---|
| Pakistan | Rajasthan, Gujarat, Punjab, J&K, Ladakh | 3,323 | LOC in J&K; Sir Creek dispute; Wagah border; Indus Water Treaty (1960) |
| China | Ladakh, HP, UK, Sikkim, Arunachal | 3,488 | LAC; McMahan Line (NE); Aksai Chin dispute; Pangsau Pass |
| Nepal | UK, UP, Bihar, Sikkim, WB | 1,751 | Open border; Treaty of Peace & Friendship (1950); cultural ties |
| Bhutan | Sikkim, Assam, Arunachal, WB | 699 | Close cultural ties; India handles defence & foreign policy |
| Bangladesh | WB, Assam, Meghalaya, Tripura, Mizoram | 4,096 | Longest land border (5 states); enclaves resolved (2015) |
| Myanmar | Arunachal, Nagaland, Manipur, Mizoram | 1,643 | Moreh border crossing; Act East Policy gateway |
| Sri Lanka | Separated by Palk Strait | Maritime | Adam's Bridge (Ram Setu); Dhanushkodi–Talaimannar ~31 km |
| Afghanistan | Ladakh (via PoK) | 106 | Only neighbor with no direct land boundary with India |
| Season | Months | Temperature | Rainfall | Key Features |
|---|---|---|---|---|
| Winter | December–February | 10–15°C (N. India), 20–25°C (S. India) | Low; N. India gets rain from W. disturbances (cyclonic from Mediterranean) | Frost in NW India; snow in Himalayas; pleasant in S. India |
| Summer (Pre-monsoon) | March–May | 35–45°C (plains), >48°C in some parts | Very low; occasional thunderstorms (mango showers in Kerala, Loo in N. India) | Hot, dry; Loo winds in N. India; convective rainfall in some areas |
| Southwest Monsoon | June–September | 25–35°C | Heavy (75–80% of annual); breaks in 2 branches | Burst of monsoon in June; wettest in NE India & W. Ghats; breaks (dry spells) common |
| Retreating Monsoon | October–November | Gradually cooling | Moderate; mainly in Tamil Nadu coast (Coromandel Coast) | Clear skies in N. India; cyclones in Bay of Bengal; Tamil Nadu receives rain |
| Type | Rainfall | Region | Characteristics | Species |
|---|---|---|---|---|
| Tropical Evergreen & Semi-Evergreen | >200 cm | Western Ghats, NE India, Andaman Islands, upper Assam | Trees do not shed leaves simultaneously; dense, multi-layered (3 layers); no distinct dry season | Rosewood, Mahogany, Ebony, Rubber, Cinchona, Bamboo |
| Tropical Deciduous (Monsoon Forest) | 70–200 cm | Most widespread; MP, Chhattisgarh, Jharkhand, Odisha, parts of Maharashtra | Most trees shed leaves in dry season; 2 types: Moist (100–200 cm) & Dry (70–100 cm) | Teak, Sal, Shisham, Sandalwood, Palas, Amaltas, Neem |
| Tropical Thorn Forest & Scrub | <70 cm | Interior Deccan, W. Rajasthan, Gujarat, leeward side of W. Ghats | Sparse vegetation; trees have deep roots, thick bark, thorny leaves; drought-resistant | Babool, Kikar, Cactus, Khair, Date palm, Acacia |
| Montane (Mountain) Forest | Varies with altitude | Himalayas & high altitude S. India (Nilgiris) | Changes with altitude: tropical → temperate → coniferous → alpine → tundra | Oaks, Chestnuts (1–1.5 km); Deodar, Pine, Silver fir (1.5–3 km); Juniper, Birch (>3.6 km) |
| Mangrove Forest (Tidal) | — | Coastal areas influenced by tides; Sundarbans (WB), Gulf of Kutch, Krishna-Godavari delta | Salt-tolerant trees; breathing roots (pneumatophores); survive in saline water | Sundari trees (Sundarbans), Avicennia, Rhizophora, Palm |
| Soil Type | Formation | Area | Characteristics | Crops | Regions |
|---|---|---|---|---|---|
| Alluvial | Deposited by rivers | ~43% (largest) | Highly fertile; 2 types: Bangar (old, less fertile) & Khadar (new, very fertile); rich in potash, poor in phosphorus | Wheat, Rice, Sugarcane, Maize, Pulses | N. Indian plains, river deltas, coastal plains |
| Black (Regur/Black Cotton) | Weathering of volcanic basalts | ~15% | High water-retaining capacity; rich in iron, lime, calcium; poor in nitrogen; cracks when dry, sticky when wet | Cotton (ideal), Soyabean, Jowar, Pulses, Tobacco | Deccan Trap (MH, Gujarat, MP, AP, KA, TN) |
| Red & Yellow | Weathering of ancient crystalline & metamorphic rocks | ~18.5% | Red colour due to iron diffusion; porous; less fertile; needs fertilizers | Pulses, Millets, Tobacco, Cotton | Eastern & S. parts of Deccan Plateau, Telangana, Odisha |
| Laterite | Intense leaching due to heavy rain & high temperature | ~4.5% | Rich in iron oxide & aluminium; very poor in organic matter, nitrogen, potash; unsuitable for agriculture without manure | Cashew nuts, Tea, Coffee, Rubber, Coconut | Summits of W. Ghats, parts of MH, Odisha, AP, Kerala |
| Arid/Desert | Sand deposition by wind | — | Sandy, saline; low moisture & organic content; low water-retaining capacity | Millets, Barley, Guar, Cactus | W. Rajasthan, parts of Gujarat (Rann of Kutch) |
| Forest/Mountain | Weathering under forest cover in hilly areas | ~8.5% | Rich in organic matter (humus); loamy; varies with altitude & rainfall | Tea, Coffee, Spices, Fruits | Himalayan region, W. Ghats, N-E states |
| Peaty/Marshy | Accumulation of organic matter in waterlogged areas | — | Heavy, black; high organic content; acidic; blue/pea-green colour | Rice (paddy) | Kerala backwaters, Odisha deltas, parts of Assam, W. Bengal |
| Biosphere Reserve | State | Key Features | Notable Wildlife |
|---|---|---|---|
| Nilgiri | TN, Kerala, Karnataka | First BR in India (1986); includes Bandipur, Mudumalai, Nagarhole, Silent Valley NPs | Elephant, Tiger, Lion-tailed Macaque, Nilgiri Tahr |
| Nanda Devi | Uttarakhand | UNESCO World Heritage; high altitude; includes Nanda Devi NP | Snow Leopard, Himalayan Tahr, Bharal (Blue Sheep) |
| Sundarbans | West Bengal | UNESCO WH; largest mangrove forest; tiger reserve | Royal Bengal Tiger, Estuarine Crocodile, Gangetic Dolphin |
| Gulf of Mannar | Tamil Nadu | Coastal BR; coral reefs; marine biodiversity hotspot | Dugong, Sea turtles, Coral species, Dolphins |
| Great Nicobar | A&N Islands | Southernmost BR in India; tropical evergreen | Nicobar Pigeon, Crab-eating Macaque, Giant Robber Crab |
| Khangchendzonga | Sikkim | UNESCO WH (2018); high altitude; Kanchenjunga | Snow Leopard, Red Panda, Musk Deer, Himalayan Black Bear |
| Manas | Assam | UNESCO WH; elephant reserve; project tiger | Asian Elephant, Golden Langur, Pygmy Hog, One-horned Rhino |
| Similipal | Odisha | Tropical deciduous; sal-dominated; tiger reserve | Tiger, Elephant, Gaur, Chausinga (4-horned antelope) |
| Pachmarhi | Madhya Pradesh | Highest point in MP; Satpura Range | Leopard, Indian Bison (Gaur), Sambar, Flying Squirrel |
| Kachchh | Gujarat | Arid ecosystem; Great Rann of Kachchh | Indian Wild Ass (Ghudkhur), Flamingos, Nilgai, Chinkara |
| Aspect | Key Points | India Status (2011 Census) |
|---|---|---|
| Age-sex composition | Youthful population in developing nations; ageing in developed nations; sex ratio = females per 1,000 males | Sex ratio: 943; Child sex ratio (0–6): 918; 65% below 35 years |
| Literacy | % of population that can read & write (age 7+); male literacy > female literacy | Total literacy: 74.04% (Male: 82.14%, Female: 65.46%) |
| Occupational structure | % in primary (agriculture), secondary (industry), tertiary (services) sectors | Primary: ~49%, Secondary: ~24%, Tertiary: ~27% |
| Health indicators | Life expectancy, infant mortality rate (IMR), maternal mortality rate (MMR) | Life expectancy: ~70 years; IMR: ~28 (declining) |
| Religion | Distribution of population by religion | Hindu: 79.8%, Muslim: 14.2%, Christian: 2.3%, Sikh: 1.7% |
| Urban-Rural | Urbanization level and rural population | Rural: 68.8%, Urban: 31.2% (growing) |
| Region | Population (approx.) | Density | Growth Rate | Key Characteristics |
|---|---|---|---|---|
| Asia | 4.7 billion | ~150/km² | High (but declining) | Most populous continent (60% of world); China & India = 2 largest; diverse economies |
| Africa | 1.4 billion | ~45/km² | Highest (2.5%+) | Fastest growing; youthful; high birth rates; Nigeria to surpass China by 2100 |
| Europe | 750 million | ~34/km² | Very low / negative | Ageing; low birth rate; immigration for workforce; Russia = largest by area |
| N. America | 380 million | ~19/km² | Low | USA = 3rd most populous; highly urbanized (82%); diverse immigration |
| S. America | 430 million | ~25/km² | Moderate | Brazil = largest country & population; highly urbanized (81%) |
| Oceania | 45 million | ~5/km² | Low | Australia & NZ dominant; very low density; high urbanization |
| Antarctica | ~1,000-5,000 (research) | — | — | No permanent residents; only scientific researchers from 30+ countries |
| Factor | Description | Effect on Climate |
|---|---|---|
| Latitude | Distance from equator | Determines angle of insolation; temperature decreases from equator to poles |
| Altitude | Height above sea level | Temperature decreases ~6.5°C per 1,000 m (Normal Lapse Rate) |
| Distance from sea | Proximity to ocean | Coastal = equable (moderate); Inland = extreme (continentality) |
| Ocean currents | Warm/cold currents flowing near coast | Warm currents raise temp & rainfall; cold currents lower temp & create deserts |
| Wind direction | Direction of prevailing winds | Onshore winds bring rain; offshore winds are dry; W. Europe warmed by westerlies from Atlantic |
| Relief/Topography | Mountains act as barriers | Windward side = heavy rain; Leeward side = rain shadow; Himalayas block cold Central Asian winds |
| Latitude of mountain ranges | E-W ranges trap monsoon | Himalayas force SW monsoon to rain over India; if they were N-S, India would be a desert |
| Vegetation cover | Forest, grassland, desert | Forests moderate temperature, increase rainfall through transpiration; deforestation causes warming |
| Region | Climate Type | Characteristics |
|---|---|---|
| Western Coast & NE India | Tropical Wet | Heavy rainfall >200 cm; hot & humid; no dry season |
| Peninsular India (interior) | Tropical Semi-Arid | Moderate rainfall; hot summers; distinct dry season |
| Ganga Plain | Tropical Monsoon (Humid Subtropical) | Hot summers, cool winters; SW monsoon rainfall |
| NW India, Deccan interior | Semi-Arid / Steppe | Low rainfall; hot summers; cool winters; desert margins |
| Thar Desert | Tropical Desert | Very low rainfall <25 cm; extreme temperatures |
| Leh-Ladakh, Spiti | Cold Desert (Highland) | Very cold; low rainfall; snow in winter |
| Coromandel Coast (TN) | Tropical Savanna | Rain from NE monsoon (Oct–Dec); less SW monsoon rain |
| Region | Annual Rainfall | Source | Season | Key Features |
|---|---|---|---|---|
| Western Ghats (windward) | >300 cm | Arabian Sea branch of SW monsoon | June–September | Heaviest rainfall; Cherrapunji (11,871 mm) & Mawsynram (11,872 mm) world's wettest |
| NE India (Assam, Meghalaya) | >200 cm | Bay of Bengal branch of SW monsoon | June–September | Very heavy; orographic rainfall; Brahmaputra floods |
| Ganga Plain (UP, Bihar, Bengal) | 100–200 cm | Both branches of SW monsoon | June–September | Depresses westward; good for agriculture; flooding common |
| Eastern Coastal Plain (Coromandel) | 100–150 cm | NE monsoon (retreating) | October–December | Tamil Nadu receives most rain from NE monsoon, not SW |
| Western Coastal Plain (Konkan) | >200 cm (coastal) | Arabian Sea branch | June–September | Mumbai receives heavy monsoon rain (avg ~200 cm/year) |
| Deccan Plateau (rain shadow) | 50–100 cm | W. Ghats block Arabian Sea winds | June–September | Rain shadow area; less rainfall; semi-arid in some parts |
| Punjab, Haryana | 40–80 cm | W. disturbances (winter) + SW monsoon | Winter + Monsoon | Winter rain critical for Rabi crops; supplemented by canal irrigation |
| Rajasthan (Thar Desert) | <25 cm | Very limited monsoon | July–September | Arid; some rainfall from retreating monsoon; desert conditions |
| Ladakh, Leh | <10 cm | Very low | Winter (snow) | Cold desert; rain shadow of Himalayas; snowfall in winter |
| Jammu & Kashmir Valley | 60–150 cm | W. disturbances + SW monsoon | Winter + Monsoon | Dual rainfall source; snow in upper reaches; Valley pleasant in summer |
| Basis | Type | Description | Examples |
|---|---|---|---|
| Origin | Natural | Resources given by nature — free gift | Air, water, soil, minerals, forests, wildlife |
| Origin | Human-made | Resources created by humans using natural resources | Buildings, roads, machines, technology |
| Origin | Human | People with knowledge, skill, health can be a resource | Doctors, engineers, teachers, workers |
| Availability | Renewable | Can be replenished naturally over time | Solar energy, wind, water, forests, wildlife |
| Availability | Non-renewable | Finite; cannot be replenished once used | Coal, petroleum, natural gas, metals |
| Ownership | Individual | Owned by individuals | Own house, farmland, personal vehicle |
| Ownership | Community | Accessible to all members of community | Grazing land, burial grounds, park, pond |
| Ownership | National | Belong to the nation | Rivers, minerals, forests, roads, railways |
| Development | Potential | Resources found but not yet utilized | Uranium in Ladakh, geothermal energy |
| Development | Stock | Materials in environment that have potential but technology lacking | Water in oceans (hydrogen fuel), rocks (minerals) |
| Development | Reserves | Resources surveyed, quality & quantity determined for future use | Oil reserves (OPEC), coal reserves of India |
| Method | Description | Suitable For |
|---|---|---|
| Contour ploughing | Ploughing along contour lines (not up-down slope) to slow runoff | Hilly areas; reduces soil erosion |
| Terrace farming | Making flat terraces (steps) on hill slopes to reduce runoff | Himalayas, Western Ghats, NE India |
| Strip cropping | Growing crops in alternate strips (erosion-resistant crops between erosion-prone) | Plain areas with wind/water erosion |
| Shelter belts / Windbreaks | Rows of trees planted to break wind force and trap soil | Desert margins; Rajasthan, Gujarat |
| Afforestation/Reforestation | Planting trees on barren land; restoring degraded forests | All degraded areas; prevents sheet erosion |
| Contour bunding | Building embankments along contour lines to check runoff | Sloping agricultural lands |
| Rock dams/check dams | Small dams built across gullies to check erosion and recharge groundwater | Gullied and ravine areas |
| Crop rotation | Growing different crops alternately to maintain soil fertility | All agricultural lands |
| Mulching | Covering soil with organic matter (straw, leaves) to reduce evaporation and erosion | Dry farming areas |
| Type | Description | Characteristics | Examples |
|---|---|---|---|
| Subsistence farming | Farmer produces only enough for family | Small holdings, traditional methods, low yield | Slash & burn (NE India), primitive tools |
| Intensive subsistence | Small land, high labour & input per unit area | Irrigated, high yielding varieties, multiple crops | Rice-wheat in Punjab, Haryana, Ganga plain |
| Commercial farming | Crops grown for sale in markets | Large holdings, modern machines, high capital | Cotton in Gujarat, sugarcane in UP, tea in Assam |
| Plantation farming | Single crop on large estate (monoculture) | Capital intensive, scientific management, export-oriented | Tea, Coffee, Rubber, Coconut, Spice |
| Extensive farming | Large area, low input per unit area | Mechanized, low labour, depends on natural fertility | Wheat in Prairies, Sheep rearing in Australia |
| Season | Months | Also Called | Major Crops |
|---|---|---|---|
| Kharif | June–September (sown with SW monsoon) | Autumn crop | Rice (paddy), Maize, Jowar, Bajra, Ragi, Cotton, Soyabean, Sugarcane, Groundnut, Arhar (Tur) |
| Rabi | October–March (sown in winter, harvested in spring) | Winter crop | Wheat, Barley, Gram, Mustard, Linseed, Peas, Lentils (Masoor), Chickpea (Chana) |
| Zaid | March–June (between Rabi & Kharif) | Summer crop | Cucumber, Watermelon, Muskmelon, Bitter gourd, Vegetables, Fodder crops |
| Crop | Type | Leading States | Conditions Required |
|---|---|---|---|
| Rice | Kharif (also Rabi in some areas) | West Bengal, UP, Punjab, AP, TN | Hot & wet climate; >100 cm rain; clayey/alluvial soil; temperature 20–27°C |
| Wheat | Rabi | UP, Punjab, Haryana, MP, Rajasthan | Cool climate; moderate rain or irrigation; well-drained loamy soil; temperature 10–15°C |
| Sugarcane | Annual (Kharif-Zaid) | UP, Maharashtra, Karnataka, TN, AP | Hot tropical climate; >100 cm rain or irrigation; temperature 21–27°C; well-drained soil |
| Tea | Plantation (perennial) | Assam (52%), W. Bengal (Darjeeling), Tamil Nadu | Tropical/subtropical; >150 cm rain well-distributed; temperature 20–30°C; well-drained, acidic soil; sloping land |
| Coffee | Plantation (perennial) | Karnataka (70%), Kerala, TN | Hot & humid; 150–250 cm rain; temperature 15–28°C; shade-grown; well-drained forest soil |
| Cotton | Kharif | Gujarat, MH, AP, Telangana, Karnataka, Rajasthan | Black soil (Regur) ideal; hot climate; 210 frost-free days; moderate rainfall 50–75 cm |
| Jute | Kharif | West Bengal, Bihar, Assam, Odisha | Hot & humid; high temperature; well-drained alluvial or loamy soil; standing water during growth |
| Rubber | Plantation (perennial) | Kerala (90%), TN, Karnataka | Hot & wet (>200 cm); temperature 25–35°C; well-drained, loamy soil; no frost |
| Mineral | Type | Leading Producers / Mines | Uses |
|---|---|---|---|
| Iron Ore | Metallic (Ferrous) | Odisha (50%), Jharkhand, Chhattisgarh, Karnataka, Goa — Bailadila (highest grade), Kiriburu | Steel industry; pig iron, sponge iron |
| Coal | Non-metallic (Fuel) | Jharkhand (Jharia, Dhanbad), Odisha, Chhattisgarh, MP, WB (Raniganj) | Thermal power, steel, cement, chemical industries |
| Petroleum | Fuel | Mumbai High (largest), Digboi, Naharkatiya, Ankleshwar, Barmer | Fuel, petrochemicals, LPG, kerosene, diesel |
| Natural Gas | Fuel | Tripura, Jaisalmer, KG Basin, Mumbai High | Fuel, fertilizer, CNG, petrochemicals |
| Bauxite | Metallic (Aluminium ore) | Odisha (largest), Gujarat, Jharkhand, Maharashtra — Amarkantak, Panchpatmali | Aluminium extraction, abrasives, cement |
| Mica | Non-metallic | Jharkhand (Koderma — mica capital of India), Rajasthan, AP, Bihar | Electrical industry, cosmetics, paints, lubricants |
| Limestone | Non-metallic | Rajasthan, MP, Chhattisgarh, Karnataka, TN | Cement industry, iron & steel, chemical industry |
| Manganese | Metallic (Ferrous) | Odisha (44%), MP, Maharashtra, Karnataka, AP | Steel industry (removes impurities), dry cell batteries |
| Gold | Metallic (Precious) | Karnataka (Kolar — deepest mine, Hutti), Jharkhand (Sindri), Rajasthan | Jewellery, investment, electronics |
| Copper | Metallic (Non-ferrous) | Rajasthan (Khetri), Jharkhand (Singhbhum), MP (Malanjkhand) | Electrical wires, cables, utensils, alloys (brass, bronze) |
| Industry | Location Factors | Major Centers | Key Points |
|---|---|---|---|
| Cotton Textile | Raw material (cotton), humid climate, cheap labour, market, transport | Mumbai, Ahmedabad, Surat, Coimbatore, Indore, Kanpur | India = 2nd largest textile producer; Mumbai = "Manchester of India"; Ahmedabad = "Manchester of East" |
| Jute Industry | Raw jute, water, cheap labour, transport (port) | Kolkata (Hooghly basin), Titagarh, Howrah | India = largest jute producer; Bangladesh = 2nd; Kolkata = jute capital |
| Iron & Steel | Iron ore, coal, limestone, water, transport, market, labour | Jamshedpur (TISCO), Bhilai, Durgapur, Rourkela, Bokaro, Salem, Vishakhapatnam | India = 2nd largest crude steel producer; TISCO (Tata) oldest (1907) |
| Sugar Industry | Sugarcane (perishable), transport, labour, power | UP (largest), Maharashtra, Karnataka, TN, AP, Bihar | Located near sugarcane growing areas (within 50 km); UP = largest producer |
| Cement Industry | Limestone, coal, gypsum, transport, market | Rajasthan, MP, Chhattisgarh, Gujarat, Tamil Nadu | India = 2nd largest cement producer; limestone is key raw material |
| IT Industry | Skilled labour, infrastructure, connectivity, govt. policy | Bengaluru (Silicon Valley of India), Hyderabad, Chennai, Pune, Noida/Gurgaon | India = global IT hub; exports $200+ billion; Bengaluru = largest IT cluster |
| Automobile | Steel, labour, market, transport, ancillary industries | Gurgaon, Chennai, Pune, Bengaluru, Jamshedpur, Kolkata | India = 4th largest auto market; Maruti Suzuki largest manufacturer |
| Petrochemical | Petroleum/natural gas, transport, market | Mumbai, Vadodara, Jamnagar, Gandhinagar, Mangalore, Haldia | Reliance Jamnagar = world's largest refinery complex |
| Mode | Network/Facts | Key Points |
|---|---|---|
| Roads | ~63 lakh km (largest road network in world) | NH (~1.4 lakh km), State highways, District roads; Golden Quadrilateral (Delhi-Mumbai-Chennai-Kolkata); NH-44 longest (Srinagar to Kanyakumari, ~3,745 km) |
| Railways | ~68,000 km; 4th largest in world | Broad gauge (~92%); Indian Railways = largest employer; Duronto, Rajdhani, Shatabdi, Vande Bharat (semi-high speed); Konkan Railway (difficult terrain) |
| Waterways | ~14,500 km navigable rivers/canals; 12 major ports | Inland: NW (Brahmaputra), SW (Goa-Kochi), E (Kolkata-Varanasi); Seaways: Kandla, Mumbai, Marmagao, Kochi, Tuticorin, Chennai, Visakhapatnam, Paradip, Haldia |
| Airways | ~450 airports/airstrips | AAI manages 100+; major: Delhi (IGI), Mumbai (CSMIA), Bengaluru, Hyderabad, Chennai, Kolkata; Indigo, Air India, SpiceJet |
| Main River | Tributaries | Direction of Join | States They Flow Through |
|---|---|---|---|
| Ganga | Yamuna (R), Son (R), Gomti (R), Ghaghara (L), Gandak (L), Kosi (L) | R = Right bank, L = Left bank | Yamuna: HP, Delhi, UP, MP; Ghaghara: Nepal, UP, Bihar; Kosi: Nepal, Bihar |
| Brahmaputra | Dibang (L), Lohit (L), Subansiri (L), Manas (R), Teesta (L), Jaldhaka (L) | Mainly left bank from NE hills | Arunachal Pradesh, Assam |
| Godavari | Pravara, Purna, Manjira, Penganga, Wardha, Wainganga, Indravati, Sabari | Both banks | Maharashtra, Telangana, Chhattisgarh, AP |
| Krishna | Bhima, Tungabhadra, Ghataprabha, Malaprabha, Musi, Munneru | Both banks | Maharashtra, Karnataka, Telangana, AP |
| Narmada | Hiran, Orsang, Barna, Kolar, Sher, Shakkar | Both banks (few tributaries in rift valley) | Madhya Pradesh |
| Indus | Jhelum, Chenab, Ravi, Beas, Sutlej (all join in Pakistan except Sutlej) | Mainly right bank from Himalayas | Ladakh, then Pakistan; Jhelum through Kashmir valley |
| Yamuna | Chambal (R), Betwa (R), Ken (R), Sind (R), Hindon (R) | Mainly right bank | MP, UP, Rajasthan |
| Mahanadi | Sheonath, Hasdeo, Mand, Ib, Jonk, Tel | Both banks | Chhattisgarh, Odisha |
| Indicator | Value | Notes |
|---|---|---|
| Total Population | 1,210.6 million (121 crores) | 2nd most populous country; 17.5% of world population |
| Population density | 382 persons/km² | Up from 325 (2001); Bihar highest (1,106), Arunachal lowest (17) |
| Sex ratio | 943 females per 1,000 males | Up from 933 (2001); Kerala highest (1,084), Haryana lowest (879) |
| Child sex ratio (0–6 years) | 918 | Down from 927 (2001); alarming decline; PCPNDT Act to prevent sex determination |
| Literacy rate | 74.04% | Male: 82.14%, Female: 65.46%; Kerala highest (94%), Bihar lowest (63.82%) |
| Birth rate (CBR) | 18.9 per 1,000 (2011) | Declining; higher in poorer states (Bihar, UP, MP) |
| Death rate (CDR) | 7.3 per 1,000 (2011) | Declining due to better healthcare; Kerala lowest, Odisha highest |
| Infant Mortality Rate (IMR) | 44 per 1,000 live births (2011) | Kerala lowest (12), MP highest (62); National goal: <28 |
| Growth rate (decadal) | 17.64% | Lowest ever; down from 21.54% (2001); Kerala lowest (4.9%), MP highest (20.3%) |
| Urban population | 31.2% | Up from 27.8% (2001); rapid urbanization; Maharashtra highest urban % |
| Age composition | 0–14: 31%, 15–64: 63.6%, 65+: 5.4% | Youthful population; demographic dividend potential |
| Stage | Birth Rate | Death Rate | Growth Rate | Characteristics | Example Countries |
|---|---|---|---|---|---|
| Stage 1 (High Stationary) | High (~40+) | High (~40+) | Very low | Pre-industrial; high birth & death; population stable | Remote tribes, historical societies |
| Stage 2 (Early Expanding) | High (~35–40) | Falling (rapidly) | High | Improving healthcare, sanitation; death rate drops; population grows fast | India, Bangladesh, Nigeria (currently here) |
| Stage 3 (Late Expanding) | Falling | Low & stable | Moderate | Family planning, education; birth rate drops; population still growing but slower | Brazil, Mexico, Indonesia |
| Stage 4 (Low Stationary) | Low (~12–15) | Low (~8–12) | Very low | Both rates low; population stable; ageing population | USA, UK, France, China |
| Stage 5 (Declining) | Very low (<10) | Low or slightly higher | Negative | Birth rate below death rate; population declining; ageing crisis | Japan, Germany, Italy, South Korea |
| Feature | Location | State/Region | Significance |
|---|---|---|---|
| Mt. Everest (Sagarmatha) | Himalayas | Nepal border | Highest peak in the world (8,848 m) |
| Kanchenjunga | Himalayas | Sikkim–Nepal border | Highest peak entirely in India (8,586 m) |
| Nanda Devi | Himalayas | Uttarakhand | Highest peak entirely in India (7,817 m) |
| Mt. Abu | Aravalli Range | Rajasthan | Highest point of Aravalli Range; hill station |
| Anai Mudi | Western Ghats | Kerala | Highest peak in S. India (2,695 m) |
| Doddabetta | Nilgiri Hills | Tamil Nadu | Highest peak in Nilgiri Hills (2,637 m) |
| Mahendragiri | Eastern Ghats | Odisha | Highest peak in E. Ghats (1,501 m) |
| Saddle Peak | Andaman Islands | Andaman & Nicobar | Highest peak in A&N Islands (732 m) |
| Gurushikhar | Aravalli Range | Rajasthan | Highest peak of Aravalli Range (1,722 m); near Mt. Abu |
| Mt. K2 (Godwin Austen) | Karakoram Range | Ladakh (PoK) | Second highest peak in world (8,611 m); in India/PoK |
| Kamet | Zaskar Range | Uttarakhand | Second highest peak entirely in India (7,756 m) |
| Dhaula Dhar | Himalayas | Himachal Pradesh | Mountain range in Middle Himalaya; Dharamshala located here |
| Cardamom Hills | Western Ghats | Kerala, Tamil Nadu | Part of S. Western Ghats; known for spice plantations (cardamom, pepper, coffee) |
| Dam / Project | State(s) | River | Significance |
|---|---|---|---|
| Bhakra Nangal Dam | Himachal Pradesh / Punjab | Satluj | Highest gravity dam; irrigation + hydropower |
| Tehri Dam | Uttarakhand | Bhagirathi | Highest dam in India (260.5 m) |
| Hirakud Dam | Odisha | Mahanadi | Longest earthen dam; flood control |
| Nagarjuna Sagar Dam | Telangana / AP | Krishna | One of largest masonry dams |
| Damodar Valley Project | Jharkhand / WB | Damodar & Barakar | First multipurpose project in India |
| Indira Sagar Dam | Madhya Pradesh | Narmada | Largest reservoir in India (by volume) |
| Sardar Sarovar Dam | Gujarat | Narmada | Controversial but largest on Narmada |
| Idukki Dam | Kerala | Periyar | Arch dam; major hydropower |
| Mettur Dam | Tamil Nadu | Kaveri | Irrigation in Kaveri delta |
| Ukai Dam | Gujarat | Tapi | Multipurpose project on Tapi |
| Rana Pratap Sagar Dam | Rajasthan | Chambal | Part of Chambal Valley Project |
| Koyna Dam | Maharashtra | Koyna | Major hydropower; Koyna earthquake (1967) |
| River | Origin | Flow Through | Mouth |
|---|---|---|---|
| Ganga | Gangotri Glacier (UK) | Uttarakhand, UP, Bihar, WB | Bay of Bengal (Ganga Sagar) |
| Yamuna | Yamunotri (UK) | HP, Delhi, UP (meets Ganga at Prayagraj) | Merges with Ganga |
| Brahmaputra | Angsi Glacier (Tibet) | Tibet (Tsangpo), Arunachal, Assam, BD | Bay of Bengal |
| Narmada | Amarkantak (MP) | MP (flowing W in rift valley) | Arabian Sea (Gulf of Khambhat) |
| Tapi | Betul (MP) | MP, Maharashtra (W-flowing rift valley) | Arabian Sea |
| Godavari | Trimbakeshwar (MH) | Maharashtra, Telangana, AP, Chhattisgarh | Bay of Bengal |
| Krishna | Mahabaleshwar (MH) | Maharashtra, Karnataka, Telangana, AP | Bay of Bengal |
| Kaveri | Brahmagiri (KA) | Karnataka, Tamil Nadu | Bay of Bengal |
| Mahanadi | Chhattisgarh Plateau | Chhattisgarh, Odisha | Bay of Bengal |
| Indus | Sengge Zangbo (Tibet) | Ladakh, then Pakistan | Arabian Sea (Pakistan) |
| Protected Area | State | Famous For | Key Species |
|---|---|---|---|
| Jim Corbett NP | Uttarakhand | First NP of India (1936); Project Tiger (1973) | Bengal Tiger, Asian Elephant, Leopard |
| Kanha NP | Madhya Pradesh | Inspired "The Jungle Book" (Kipling) | Barasingha (Swamp Deer), Tiger |
| Bandhavgarh NP | Madhya Pradesh | Highest tiger density in India | Bengal Tiger, Leopard |
| Ranthambore NP | Rajasthan | Tigers amid historical ruins | Bengal Tiger, Sloth Bear |
| Kaziranga NP | Assam | UNESCO World Heritage; two-thirds of world's one-horned rhinos | One-horned Rhinoceros, Elephant, Wild Buffalo |
| Gir NP | Gujarat | Last refuge of Asiatic Lions | Asiatic Lion, Leopard, Crocodile |
| Sundarbans NP | West Bengal | UNESCO; largest mangrove forest; tiger reserve | Royal Bengal Tiger, estuarine crocodile |
| Periyar NP | Kerala | Elephant & tiger reserve; boat rides | Elephant, Tiger, Nilgiri Tahr |
| Sariska NP | Rajasthan | Tiger reserve | Tiger, Leopard, Rhesus Monkey |
| Manas NP | Assam | UNESCO; elephant & biosphere reserve | Asian Elephant, Golden Langur, Pygmy Hog |
| Hemis NP | Ladakh | High-altitude national park | Snow Leopard, Ibex, Blue Sheep |
| Keibul Lamjao NP | Manipur | World's only floating NP (Loktak Lake) | Brow-antlered Deer (Sangai) — endangered |
| Desert NP | Rajasthan | Largest NP in India (3,162 km²) | Great Indian Bustard, Chinkara, Blackbuck |
| Silent Valley NP | Kerala | Evergreen tropical rainforest; UNESCO | Lion-tailed Macaque, Nilgiri Langur |
| Namdapha NP | Arunachal Pradesh | Biodiversity hotspot; 4th largest NP | Snow Leopard, Red Panda, Clouded Leopard |
| Type | Place | State | Industry / Port Significance |
|---|---|---|---|
| Steel | Jamshedpur (TISCO) | Jharkhand | Tata Iron & Steel — oldest private steel plant (1907) |
| Steel | Bhilai | Chhattisgarh | Bhilai Steel Plant — with Russian collaboration |
| Steel | Durgapur | West Bengal | Durgapur Steel Plant |
| Steel | Rourkela | Odisha | Rourkela Steel Plant — with German collaboration |
| Steel | Bokaro | Jharkhand | Bokaro Steel Plant — with Soviet collaboration |
| IT | Bengaluru | Karnataka | IT capital of India ("Silicon Valley of India") |
| IT | Hyderabad | Telangana | HITEC City, major IT hub |
| Textile | Mumbai | Maharashtra | Cotton textile capital of India |
| Textile | Ahmedabad | Gujarat | Major cotton textile center |
| Port | Mumbai (Jawaharlal Nehru Port) | Maharashtra | Largest container port in India |
| Port | Kandla | Gujarat | Major tidal port; handles bulk cargo |
| Port | Chennai | Tamil Nadu | Oldest artificial port; 2nd largest |
| Port | Visakhapatnam | Andhra Pradesh | Deepest natural harbour on E. coast |
| Port | Kochi | Kerala | Major port on W. coast; spice trade |
| Port | Paradip | Odisha | Deep water port; handles iron ore export |
| Port | Kolkata / Haldia | West Bengal | Riverine port; Haldia downstream for bulk cargo |
| Space | Sriharikota (SDC) | Andhra Pradesh | Satish Dhawan Space Centre — ISRO launch pad |
| Nuclear | Kalpakkam | Tamil Nadu | Madras Atomic Power Station |
| Nuclear | Tarapur | Maharashtra | First nuclear power plant in India (1969) |
| Region | State(s) | Soil Type / Vegetation | Significance |
|---|---|---|---|
| Malwa Plateau | Madhya Pradesh | Black soil (Regur) | Ideal for cotton cultivation |
| Chota Nagpur Plateau | Jharkhand | Red soil; laterite in parts | Rich in minerals: iron, coal, copper, mica; Damodar valley |
| Ganga-Yamuna Doab | UP, Haryana | Alluvial (Khadar & Bangar) | Most fertile region; wheat & sugarcane belt |
| Konkan Coast | Maharashtra, Goa | Laterite soil | Rice, coconut, cashew cultivation |
| Coromandel Coast | Tamil Nadu | Alluvial; laterite in parts | NE monsoon rainfall; rice, sugarcane, cotton |
| Godavari-Krishna Delta | AP, Telangana | Alluvial soil | Rice bowl of S. India; intensive agriculture |
| Thar Desert | Rajasthan, Gujarat | Arid/Desert soil | Sand dunes; very low rainfall; cactus, kikar |
| Kerala Coast (Malabar) | Kerala | Laterite & forest soil | Backwaters; coconut, rubber, spices |
| Western Ghats | MH, KA, KL, TN | Laterite & forest soil; evergreen forest | UNESCO WH; biodiversity hotspot; high rainfall |
| Deccan Plateau (interior) | MH, KA, AP, Telangana | Black soil & red soil | Cotton, jowar, pulses; semi-arid |
| Assam Valley | Assam | Alluvial soil; rich in iron | Tea, rice, jute; Brahmaputra floodplain |
| Ladakh | Ladakh | Mountain/Desert soil; gravelly | Cold desert; sparse vegetation; apricots, barley |
| Term | Definition |
|---|---|
| Latitude | Angular distance of a place N or S of the equator, measured in degrees (0°–90°) |
| Longitude | Angular distance of a place E or W of the Prime Meridian (0°), measured in degrees (0°–180°) |
| Meridian | A semi-circle running from pole to pole; all meridians are equal in length |
| Local Time | Time based on the longitude of a place; changes by 4 minutes per degree of longitude |
| Standard Time | Uniform time adopted for a country/region; India = IST = 82½°E (GMT + 5:30) |
| International Date Line | 180° longitude; changes the calendar date; zigzags to avoid dividing land masses |
| Equator | 0° latitude; imaginary line dividing earth into Northern and Southern Hemispheres |
| Prime Meridian | 0° longitude; passes through Greenwich, London; divides earth into Eastern and Western Hemispheres |
| Globe | True model of the earth; shows continents, oceans in correct shape, size, and proportion |
| Grid | Network of latitudes and longitudes used to locate places precisely on earth's surface |
| Map projection | Method of representing the curved surface of the earth on a flat surface (map) |
| Great Circle | Any circle that divides the globe into two equal halves; shortest route between two points |
| Tropic of Cancer | 23½°N latitude; northern limit of the sun's vertical rays (overhead on June 21) |
| Tropic of Capricorn | 23½°S latitude; southern limit of the sun's vertical rays (overhead on Dec 22) |
| Arctic Circle | 66½°N latitude; north of this, sun doesn't set on summer solstice (midnight sun) |
| Antarctic Circle | 66½°S latitude; south of this, sun doesn't set on southern summer solstice |
| Isotherm | Line on map connecting places with the same temperature |
| Isobar | Line on map connecting places with the same atmospheric pressure |
| Isohyet | Line on map connecting places receiving the same amount of rainfall |
| Isoline | General term for any line connecting points of equal value (isotherm, isobar, isohyet, contour) |
| Insolation | Incoming solar radiation received by earth's surface; measured in cal/cm²/min |
| Albedo | Fraction of solar radiation reflected by a surface (ice = high albedo ~0.9, forest = low ~0.1) |
| Greenhouse effect | Trapping of heat by greenhouse gases (CO₂, CH₄, N₂O, CFCs) that keeps earth warm |
| Coriolis force | Deflection of moving objects (air, water) due to earth's rotation; right in NH, left in SH |
| Convection | Transfer of heat through the movement of a fluid (air, water) due to density differences |
| Condensation | Process of water vapour turning into liquid water (clouds, dew, fog) when cooled below dew point |
| Evaporation | Process of liquid water turning into water vapour; increases with temperature, wind, surface area |
| Transpiration | Loss of water vapour from plants through stomata; contributes to atmospheric moisture |
| Precipitation | Any form of water (rain, snow, sleet, hail, drizzle) falling from atmosphere to earth |
| Humidity | Amount of water vapour in air; Absolute humidity (actual content), Relative humidity (% of saturation) |
| Dew point | Temperature at which air becomes saturated (100% relative humidity); condensation begins |
| Front | Boundary between two air masses of different temperature, humidity, and density |
| Anticyclone | High-pressure system with descending air; clockwise wind (NH); associated with clear, dry weather |
| Cyclone | Low-pressure system with ascending air; counterclockwise wind (NH); associated with clouds and rain |
| Erosion | Wearing away and removal of rock, soil, or dissolved material by natural agents (water, wind, ice) |
| Deposition | Laying down of eroded material (sediment) when the transporting agent loses energy |
| Weathering | In-situ breakdown of rocks by physical, chemical, or biological processes (no transport) |
| Sediment | Broken pieces of rock, soil, or organic material that is transported and deposited by natural agents |
| Lithosphere | Rigid outer shell of earth (crust + uppermost part of mantle); broken into tectonic plates |
| Asthenosphere | Partially molten, ductile layer of mantle below lithosphere; plates float/move on it |
| Tectonic plate | Large, rigid piece of lithosphere that moves on asthenosphere; causes earthquakes, volcanoes |
| Subduction | Process where one tectonic plate slides beneath another into the mantle (at convergent boundary) |
| Rift valley | Long, narrow valley formed when a block of land sinks between two parallel faults (divergent boundary) |
| Fault | Fracture/crack in earth's crust along which rocks on either side move relative to each other |
| Fold | Bending of rock layers due to compressive forces (convergent plates); types: anticline (upfold), syncline (downfold) |
| Volcano | Opening in earth's crust through which magma, gases, ash erupt; types: shield, composite, cinder cone |
| Magma | Molten rock beneath earth's surface; becomes lava when it erupts at the surface |
| Lava | Molten rock that flows out of a volcano onto earth's surface |
| Tsunami | Large ocean waves generated by underwater earthquakes, volcanic eruptions, or landslides |
| Earthquake | Sudden shaking/vibration of earth due to release of energy along a fault; measured by Richter/Seismograph |
| Epicenter | Point on earth's surface directly above the focus (origin) of an earthquake |
| Focus/Hypocenter | Point inside earth where an earthquake originates; energy release starts here |
| Seismograph | Instrument that records seismic waves (earthquake vibrations); measures magnitude on Richter scale |
| Continental shelf | Gentle, sloping underwater extension of continent; shallow (up to 200 m); rich in fishing & oil |
| Continental slope | Steep descent from continental shelf to ocean floor; marks edge of continent |
| Ocean trench | Deep, V-shaped depression in ocean floor, usually near convergent plate boundaries (e.g., Mariana Trench) |
| Mid-ocean ridge | Underwater mountain range formed at divergent plate boundaries where new crust is created |
| Salinity | Total amount of dissolved salts in ocean water; average = 35‰ (parts per thousand); varies with evaporation, freshwater input |
| Thermocline | Layer in ocean where temperature changes rapidly with depth; separates warm surface from cold deep water |
| Spring tide | Highest and lowest tides occurring during full moon and new moon (sun, moon, earth aligned) |
| Neap tide | Weakest tides during quarter moon (sun and moon at right angles; tidal forces partially cancel) |
| Ocean current | Continuous, directed movement of ocean water; surface currents (wind-driven) and deep currents (density-driven) |
| Biome | Large ecological area with distinct flora and fauna adapted to its climate (e.g., tropical rainforest, desert, tundra) |
| Ecosystem | Community of living organisms interacting with their physical environment (biotic + abiotic components) |
| Biodiversity | Variety of life forms at all levels (genes, species, ecosystems) in a given area |
| Watershed | Area of land drained by a river and its tributaries; boundary = ridge/divide separating two watersheds |
| Water table | Upper level of groundwater that is saturated; fluctuates with rainfall, extraction, seasons |
| Aquifer | Underground layer of permeable rock/sediment that stores and transmits groundwater |
| Term | Definition |
|---|---|
| ITCZ (Inter-Tropical Convergence Zone) | Zone of low pressure near equator where NE and SE trade winds converge; shifts N in summer, S in winter |
| Mango showers | Pre-monsoon showers in Kerala and Karnataka (April–May); helps in mango ripening; also called 'Kal Baisakhi' in Bengal |
| Loo | Hot, dry winds blowing from west to east across N. Indian plains in summer (May–June); temperature can reach 48°C |
| Mango burst | Sudden onset of monsoon in June when rainfall increases dramatically after dry pre-monsoon period |
| Western Disturbances | Cyclonic storms from Mediterranean Sea that bring winter rain to N. India (Punjab, Haryana, Delhi, UP); important for Rabi crops |
| El Niño | Warming of equatorial Pacific Ocean; weakens Indian monsoon → drought (opposite: La Niña strengthens monsoon) |
| Monsoon | Seasonal reversal of wind direction; SW monsoon (June–Sept) brings rain; NE monsoon (Oct–Nov) brings rain to TN coast |
| Rain shadow area | Leeward side of mountains receiving less rainfall because mountains block rain-bearing winds (e.g., Deccan east of W. Ghats) |
| Alluvium | Sediment (silt, clay, sand, gravel) deposited by rivers; forms fertile alluvial plains (Indo-Gangetic plain) |
| Regur soil | Black cotton soil; formed from weathering of volcanic basalt; ideal for cotton cultivation; self-ploughing (cracks when dry) |
| Khadar & Bangar | Khadar = new alluvial soil (flood-prone, very fertile); Bangar = old alluvial soil (above flood level, less fertile, contains kankar) |
| Kankar | Calcareous (calcium carbonate) deposits found in old alluvial soil (Bangar); imparts hardness to soil |
| Laterite | Red soil formed by intense leaching in hot, wet tropical areas; rich in iron & aluminium; poor in organic matter/nitrogen |
| Bhabar | Narrow belt at foothills of Himalayas with pebbles & boulders; porous; rivers disappear into ground |
| Terai | South of Bhabar; wet, swampy; rivers reappear; thick forests; malaria-prone historically |
| Karewas | Thick deposits of lacustrine (lake) sediments found in Kashmir Valley; used for saffron cultivation |
| Duars | Floodplains of Brahmaputra in Assam; region between Himalayan foothills and river bank; very fertile |
| Coromandel Coast | Eastern coastal plain from Krishna delta to Kanyakumari in TN; receives NE monsoon rainfall |
| Konkan Coast | Western coastal plain from Daman to Goa; part of W. coastal plain |
| Malabar Coast | Western coastal plain from Goa to Kanyakumari (Kerala); backwaters, lagoons |
| Mascarene High | Subtropical high-pressure area near Mauritius/Madagascar that drives SW monsoon winds toward India |
| Somali Current | Strong ocean current in Arabian Sea; part of monsoon system; strengthens monsoon rainfall on W. coast |
| Brahmaputra (Tsangpo) | Known as Tsangpo in Tibet, Siang in Arunachal, Brahmaputra in Assam, Jamuna in Bangladesh; one of few male-named rivers |
| Doab | Land between two rivers; e.g., Bist Doab (Beas-Sutlej), Bari Doab (Beas-Ravi), Rachna Doab (Ravi-Chenab) |
| Sundarbans | Largest mangrove forest in the world; delta of Ganga-Brahmaputra; UNESCO World Heritage; home to Royal Bengal Tiger |
| Saddle Peak | Highest peak in Andaman & Nicobar Islands (732 m); located in N. Andaman |
| Indira Point | Southernmost tip of India (6°45'N, 97°25'E); in Great Nicobar island; submerged during 2004 tsunami |
| Siachen Glacier | Largest glacier outside polar regions; located in Karakoram range; India-Pakistan disputed territory |
| Term | Definition |
|---|---|
| Demography | Scientific study of population — size, distribution, composition, growth, and changes over time |
| Census | Official count of population and collection of demographic data; India conducts every 10 years |
| Sex ratio | Number of females per 1,000 males in a population; India: 943 (2011) |
| Literacy rate | Percentage of population aged 7+ who can read and write with understanding; India: 74.04% |
| Birth rate (CBR) | Number of live births per 1,000 population per year |
| Death rate (CDR) | Number of deaths per 1,000 population per year |
| Infant Mortality Rate | Number of infant deaths (under 1 year) per 1,000 live births; key health indicator |
| Maternal Mortality Rate | Number of maternal deaths per 100,000 live births |
| Total Fertility Rate (TFR) | Average number of children born per woman during her lifetime; India: ~2.0 (NFHS-5) |
| Replacement level fertility | TFR of 2.1 needed to maintain population stability (replace parents) |
| Demographic dividend | Economic advantage when working-age population (15–64) exceeds dependents; India has this |
| Demographic transition | Shift from high birth & death rates to low rates as country develops economically |
| Migration | Movement of people from one place to another (internal or international, temporary or permanent) |
| Urbanization | Increase in proportion of population living in urban areas; India: 31.2% urban (2011) |
| Agriculture | Science & art of cultivating soil, producing crops, and raising livestock for human use |
| Kharif crop | Crop sown at beginning of monsoon (June–July) and harvested in autumn (Sept–Oct); e.g., rice, cotton |
| Rabi crop | Crop sown in winter (Oct–Dec) and harvested in spring (March–April); e.g., wheat, gram, mustard |
| Zaid crop | Crop grown between Rabi and Kharif (March–June); requires irrigation; e.g., cucumber, watermelon |
| Green Revolution | Introduction of HYV seeds, chemical fertilizers, irrigation in 1960s; transformed Indian agriculture (started in Punjab) |
| White Revolution (Operation Flood) | Program launched by Verghese Kurien; made India largest milk producer (1970s); NDDB/AMUL model |
| Blue Revolution | Focus on aquaculture and fisheries development; making India self-sufficient in fish production |
| Golden Revolution | Revolution in horticulture and honey production; India 2nd in fruits & vegetables production |
| Subsistence farming | Farming where the farmer produces just enough food for himself and family; small holdings |
| Commercial farming | Large-scale farming for sale in markets; uses modern techniques, high capital, machines |
| Plantation farming | Large estate with single cash crop (monoculture); export-oriented; e.g., tea, coffee, rubber |
| Sericulture | Rearing of silkworms for silk production; Karnataka is largest producer in India |
| Pisciculture | Breeding and rearing of fish (aquaculture) in ponds, lakes, or enclosures for commercial purpose |
| Horticulture | Cultivation of fruits, vegetables, flowers, ornamental plants; India 2nd largest producer |
| Agro-based industry | Industry that uses agricultural products as raw material; e.g., sugar, textile, jute, food processing |
| Mineral-based industry | Industry that uses minerals as raw material; e.g., iron & steel, aluminium, cement |
| Forest-based industry | Industry dependent on forest products; e.g., paper, plywood, matchboxes, resin, lac |
| Industrial region | Area with high concentration of industries due to availability of raw materials, labour, transport |
| Multipurpose project | Project serving multiple objectives: irrigation, flood control, hydroelectricity, water supply, fisheries |
| Sustainable development | Development that meets present needs without compromising future generations' ability to meet their needs |
| Resource conservation | Careful use and management of resources to prevent depletion and environmental degradation |
| Biosphere reserve | Protected area for conservation of biodiversity (flora, fauna, ecosystem); UNESCO designates; India has 18 |
| National Park | Protected area for conservation of wildlife, flora & fauna; no human activity allowed (strictly protected) |
| Wildlife Sanctuary | Protected area for conservation of wildlife; limited human activity allowed; some rights of local people |
| Biodiversity hotspot | Area with high species diversity under threat from human activity; India has 4 (Western Ghats, Himalayas, Sundaland, Indo-Burma) |
| Endemic species | Species found naturally in only one geographic area and nowhere else (e.g., Lion-tailed Macaque in W. Ghats, Nilgiri Tahr) |
| Ecotone | Transition zone between two different ecosystems (e.g., forest edge, mangrove-salt marsh boundary); rich in biodiversity |
| Food chain | Sequence of organisms through which energy flows; each level = trophic level; sun → producer → herbivore → carnivore → decomposer |
| Food web | Network of interconnected food chains in an ecosystem; shows complex feeding relationships among organisms |
| Ecological succession | Gradual process of change in species composition of a given area over time; primary (bare rock) and secondary (after disturbance) |
| Carbon cycle | Movement of carbon between atmosphere, biosphere, oceans, and geosphere; photosynthesis absorbs CO₂, respiration & combustion release it |
| Nitrogen cycle | Process by which nitrogen is converted between its various chemical forms (N₂, NH₃, NO₃⁻); nitrogen fixation by bacteria essential |
| Water cycle (Hydrological cycle) | Continuous movement of water: evaporation → condensation → precipitation → runoff → infiltration → evaporation |
| Green GDP | GDP adjusted for environmental costs (pollution, resource depletion, biodiversity loss); measures sustainable economic growth |
| Revolution / Mission | Year / Period | Area | Key Points |
|---|---|---|---|
| Green Revolution | 1960s–70s | Agriculture | Introduction of HYV seeds, chemical fertilizers, irrigation; led by M.S. Swaminathan; transformed Punjab, Haryana, UP |
| White Revolution | 1970s | Milk/Dairy | Operation Flood; led by Verghese Kurien (Father of White Revolution); made India largest milk producer; NDDB, AMUL model |
| Blue Revolution | 1980s–90s | Fisheries | Focus on aquaculture and fish production; India 2nd largest fish producer; inland and marine fisheries development |
| Golden Revolution | 1990s–2000s | Horticulture | India became 2nd in fruits & vegetables production; honey production; led by K. P. Prabhakaran |
| Yellow Revolution | 1990s | Oil seeds | Increase oilseed production to reduce edible oil import dependency; NPKP (National Pulses & Oilseeds Project) |
| Pink Revolution | 2000s | Poultry/Meat | Increase in egg, poultry, meat production; India became one of largest egg producers |
| Grey Revolution | 1990s | Fertilizers | Increase in fertilizer production and consumption; associated with overuse of chemical fertilizers |
| Round Revolution | 1990s–2000s | Potato | Increase in potato production; India became 2nd largest potato producer after China |
| Project Tiger | 1973 | Tiger Conservation | Launched from Jim Corbett NP; 53 tiger reserves; tiger population increased from ~1,800 to ~3,900 (2023) |
| Project Elephant | 1992 | Elephant Conservation | 32 elephant reserves; protects elephant corridors and habitats across India |
| Ganga Action Plan | 1985 | River cleaning | First attempt to clean Ganga; later Namami Gange (2014) with Rs 20,000 crore budget |
| National Afforestation Programme | 2000 | Forestry | Promote afforestation and tree planting; increase forest & tree cover to 33% of geographical area |