Every NCERT book that matters for UPSC — open a book, then a chapter. Learn each chapter's concepts, then how UPSC tests them — with diagrams, flowcharts and the past questions to attempt.
Resources and Development
Start here: why this chapter matters
This is Chapter 1 of the Class 10 geography book Contemporary India – II: 12 pages (1–12). Its parts: what a resource is and how resources are classified; development of resources and sustainable development (with boxes on the Rio Earth Summit, 1992 and Agenda 21); resource planning in India; conservation of resources; land resources and the land-use pattern (two pie charts, 1960–61 and 2019–20); land degradation; soil as a resource and the six soil types (with a full-page soil map and four soil photographs); soil erosion and conservation. It ends with 3 MCQs, 5 written questions and a project with a word puzzle. Every share is recomputed from the book's own figures; illustrations we add are marked †.
- Builds on India: Physical Environment (Class 11): kegy102 (plains, plateaus, the Deccan trap that gives black soil) and kegy105 (forests and the one-third forest goal); and Fundamentals of Physical Geography: kegy205 (weathering and soil formation), kegy206 (gullies, ravines, wind action).
- Goes further in India: People and Economy (Class 12): legy203 (land-use categories since 1950–51, cropping intensity), legy206 (planning and sustainable development), legy209 (land degradation and wasteland); and keec107 (Environment and Sustainable Development).
- Pairs with jess201 (Development — sustainability, groundwater and the ‘needs of future generations’). Leads into jess102–jess107 of this book: forests, water, agriculture, minerals, industry, transport.
- UPSC, honestly: Indian geography — soils, resources, agriculture, minerals, industries, transport — is tested in Prelims every year and in GS1 Mains. From this chapter, Prelims has asked where laterite occurs and what grows on it (1979, 2013), state–soil matches (1988), why red soil is red (2010), how black cotton soil formed (2021), land-use shares (2010), salinity in Punjab (1988, 2011), soil-conservation methods (1982, 1991, 2010), gullies and the Chambal ravines (1994, 2001) and Agenda 21 (2016). Mains GS1 has asked about land-use change (2026), desertification (2020) and the Deccan trap's resources (2022). We link 25.
| Word | What it means here |
|---|---|
| Resource | Anything in the environment usable to meet needs, if technologically accessible, economically feasible and culturally acceptable |
| Biotic / abiotic | From living things (forests, fish, livestock) / from non-living things (rocks, metals) |
| Renewable / non-renewable | Renewed by natural processes (solar, wind, water, forests) / formed over very long periods (minerals, fossil fuels) |
| Sustainable development | Development that does not damage the environment and does not compromise the needs of future generations |
| Agenda 21 | The action plan for sustainable development adopted at the Rio Earth Summit (UNCED), 1992 |
| Resource planning | Inventory of resources, a structure to develop them, and matching them with national plans |
| Net sown area (NSA) | Physical area on which crops are sown and harvested, counted once |
| Gross cropped area | Net sown area plus area sown more than once in a year |
| Fallow land | Cultivable land left unsown: current fallow (≤ 1 year), other fallow (1–5 years) |
| Culturable waste land | Land left uncultivated for more than 5 agricultural years |
| Land degradation | Decline in the land's usefulness — by erosion, waterlogging, salinity, dust, pollution, mining scars |
| Soil profile / horizon | The vertical section of a soil / one of its layers |
| Bangar / khadar | Old alluvium (more kankar) / new alluvium (finer, more fertile) |
| Regur | Another name for black (black cotton) soil |
| Leaching | Heavy rain washing nutrients down and out of the soil — the making of laterite |
| Kankar | Lime (calcium carbonate) nodules in soil; NCERT also spells it ‘kanker’ |
| Gully / bad land / ravine | Deep channel cut by running water / land made unfit by gullies / the Chambal's name for such land |
At a glance — the six ideas to carry away
- Resource = technologically accessible + economically feasible + culturally acceptable. Not a free gift: nature + technology + institutions.
- Classified by origin (biotic/abiotic), exhaustibility (renewable/non-renewable), ownership (individual → international), status (potential, developed, stock, reserves).
- Sustainable development: Club of Rome (1968) → Small is Beautiful → Brundtland, 1987 (Our Common Future) → Rio 1992, Agenda 21.
- Relief: 43% plains, 30% mountains, 27% plateaus. Land-use data cover 93% of 3.28 million km².
- 2019–20: net sown 45.64% (≈ 54% with all fallows), forest 23.41% vs 33% goal (1952 policy). NSA > 80% in Punjab, Haryana; < 10% in Arunachal, Mizoram, Manipur, A&N.
- Alluvial (bangar old / khadar new), black = regur (basalt, cotton, cracks), red (iron), laterite (leached, pH < 6; tea, coffee, cashew), arid (kankar). Punjab–Haryana: over-irrigation → salinity.
1. What makes something a resource — and how resources are grouped
NCERT's definition: everything in our environment that can be used to satisfy our needs is a resource, provided it is technologically accessible, economically feasible and culturally acceptable. Turning things into resources is an interactive relationship between nature, technology and institutions: people work on nature through technology and create institutions to speed up economic development. So resources are not free gifts of nature, as many assume — they are a function of human activities, and people themselves are essential components of resources.
The book lists four bases of classification: origin (biotic and abiotic), exhaustibility (renewable and non-renewable), ownership (individual, community, national, international) and status of development (potential, developed stock and reserves). Its Fig. 1.2 also splits resources into natural and human: natural ones are renewable (continuous or flow resources such as wind and water; biological ones such as forests and wildlife) or non-renewable (recyclable, such as metals; non-recyclable, such as fossil fuels); human resources are seen in their quantity and quality and in the structures and institutions people build.
| Basis | Types | Example (earlier edition / ours †) |
|---|---|---|
| Origin | Biotic · Abiotic | Fisheries, livestock, people · rocks, metals |
| Exhaustibility | Renewable (flow or biological) · Non-renewable (recyclable or not) | Wind, water, forests · metals (recyclable), coal and petroleum (used up once burnt) |
| Ownership | Individual · Community · National · International | A farmer's own land · village grazing ground, burial ground · minerals, forests, roads, territorial waters · ocean resources beyond 200 nautical miles |
| Status of development | Potential · Developed · Stock · Reserves | Wind and solar power in Rajasthan and Gujarat (potential) · surveyed and in use (developed) · hydrogen in water, without the technology to use it widely (stock) · water stored in dams, forest timber kept for later (reserves) |
- Opening box: name the items that make life comfortable in villages and towns and the materials they are made of. The point: comfort is built from transformed resources (outline in the in-text section).
- Fig. 1.1: a triangle with ‘Physical Environment (Nature)’ at the top, ‘Technology’ and ‘Institutions’ at the two lower corners, and ‘Human Beings’ in the centre with arrows out to each corner. The point: people sit at the centre and link nature, technology and institutions.
- Fig. 1.2: a branching chart — Resources → Natural (renewable: continuous/flow and biological; non-renewable: recyclable and non-recyclable) and Human (structures and institutions; quantity and quality). The point: a second, simpler way to group resources, with people as a resource in their own right.
- The reprint names the four bases but no longer defines them; the definitions above are from the earlier edition. Learn them anyway — exam questions use them.
- Stock ≠ reserves: stock cannot yet be used for want of technology; reserves are a subset of stock usable with existing technology but not yet used.
- Forests are renewable and biotic; metals are non-renewable but recyclable; fossil fuels are non-renewable and not recyclable.
- People are part of resources (‘human beings themselves are essential components of resources’).
2. Development of resources and sustainable development
Because resources were long thought to be free gifts of nature, people used them indiscriminately. NCERT names three results: depletion of resources to satisfy the greed of a few; accumulation of resources in few hands, dividing society into haves and have-nots; and global ecological crises — global warming, ozone-layer depletion, environmental pollution and land degradation. An equitable distribution of resources is therefore essential for a sustained quality of life and global peace, and resource planning is essential for the sustainable existence of all life — itself a part of sustainable development: development without damaging the environment, in which the present does not compromise the needs of future generations.
Conservation. Irrational consumption and over-use cause socio-economic and environmental problems, so resources must be conserved at every level. Gandhiji put it as ‘there is enough for everybody's need and not for anybody's greed’; he blamed greedy individuals and the exploitative nature of modern technology for depletion, and wanted production by the masses in place of mass production. Internationally, NCERT traces the idea through the Club of Rome (1968), E. F. Schumacher's Small is Beautiful (1974 in the book), the Brundtland Commission Report (1987), which introduced ‘sustainable development’ and was published as Our Common Future, and the Earth Summit at Rio de Janeiro (1992).
- Sustainable development box: the definition above. The point: growth today must leave the future its share.
- Rio de Janeiro Earth Summit, 1992 box: in June 1992 more than 100 heads of state met for the first International Earth Summit to tackle environmental protection and socio-economic development; leaders signed the declaration on global climatic change and biological diversity; the Rio Convention endorsed the global Forest Principles and adopted Agenda 21. The point: sustainability became a shared global commitment.
- Agenda 21 box: signed at the UN Conference on Environment and Development (UNCED), Rio, 1992, to achieve global sustainable development and fight environmental damage, poverty and disease through co-operation; one major aim is that every local government draws its own local Agenda 21. The point: global goals are delivered locally.
- Club of Rome box (p. 4): the 1968 → 1974 → 1987 → 1992 sequence. The point: the conservation idea has a traceable history.
- Small is Beautiful was first published in 1973 (Beyond NCERT); the book's 1974 is a slip. Safe line: ‘Schumacher's Small is Beautiful (1973)’.
- The Club of Rome was founded in 1968; its famous report, The Limits to Growth, came in 1972. It did not propose the Sustainable Development Goals (UPSC 2016).
- Rio did not produce one ‘declaration on climatic change and biological diversity’: two separate treaties — the UN Framework Convention on Climate Change (UPSC 2010) and the Convention on Biological Diversity — were opened for signature there, alongside the Rio Declaration, the Forest Principles and Agenda 21.
- Agenda 21 is a non-binding action plan, born at Rio 1992, not at Johannesburg 2002 (UPSC 2016).
- Rio is called the first Earth Summit, but the Stockholm UN Conference on the Human Environment (1972) came earlier.
- Brundtland: the World Commission on Environment and Development, chaired by Gro Harlem Brundtland (then Prime Minister of Norway); its definition — development that ‘meets the needs of the present without compromising the ability of future generations to meet their own needs’.
- UNCED, Rio, 3–14 June 1992. The UN Convention to Combat Desertification grew out of Rio and was adopted in 1994.
- Rio+20 (2012) began the process that led to the 17 Sustainable Development Goals, adopted in September 2015 for 2030; SDG 15 covers life on land, including land-degradation neutrality (target 15.3).
- Local Agenda 21 is in Chapter 28 of Agenda 21 (‘local authorities’ initiatives’).
| Are there limits to resource use? (Beyond NCERT attribution) | Who | Position |
|---|---|---|
| Limits are real | Club of Rome, The Limits to Growth (D. H. Meadows and others, 1972) | finite resources and exponential growth in population and output would hit limits within about a century if trends continued |
| Ingenuity widens limits | Julian Simon, The Ultimate Resource (1981) | human ingenuity is the ultimate resource; scarcity raises prices, which drives substitution, recycling and new technology |
| Scale of production | Gandhiji (as quoted by NCERT); Schumacher (1973) — ‘appropriate technology’ | small-scale production by the masses, with technology suited to people and place |
| Scale of production | India's Second Five Year Plan (1956; the Mahalanobis model) | large-scale heavy industry as the base for rapid growth |
3. Resource planning in India
Planning is the widely accepted strategy for the judicious use of resources, and it matters especially in India, where resources are unevenly spread: some regions are rich in some resources and poor in others, some are self-sufficient, some have acute shortages. This calls for balanced resource planning at the national, state, regional and local levels.
| Region (NCERT's examples) | Rich in | Short of |
|---|---|---|
| Jharkhand, Chhattisgarh, Madhya Pradesh | minerals and coal | — |
| Arunachal Pradesh | water resources | infrastructure |
| Rajasthan | solar and wind energy | water |
| Cold desert of Ladakh | cultural heritage | water, infrastructure, some vital minerals; relatively isolated |
Resources alone are not enough. Availability is a necessary condition for development, but without matching changes in technology and institutions it can hinder development: many resource-rich regions in India are economically backward, while some resource-poor ones are developed. History shows why: rich resources drew colonisers, and it was their superior technology that let them exploit the colonies' resources and dominate them. So in India, development — and resource development in particular — depends not only on resources but on technology, the quality of human resources and people's historical experience.
- Activity (p. 2): imagine oil running out; survey your colony or village on attitudes to recycling household and farm waste, and collage the results. The point: resources are finite and waste can be a resource.
- Activity (p. 3): list your state's resources and the important ones it lacks. The point: every region has surpluses and deficits — the case for planning.
- Find out (p. 3): which resources are being developed with community participation by panchayats or ward committees? The point: planning happens locally too (local Agenda 21).
- Question (p. 3): name resource-rich but backward regions and resource-poor but developed ones, with reasons. Outlines for all of these are in the in-text section.
- The Planning Commission (1950) drew up the Five Year Plans; it was replaced by NITI Aayog on 1 January 2015. The Twelfth Plan (2012–17) was the last.
- Surveying and mapping are done by bodies such as the Survey of India, the Geological Survey of India and the National Bureau of Soil Survey and Land Use Planning (NBSS&LUP, an ICAR institute) — step 1 of NCERT's process.
4. Land resources and the land-use pattern
Land supports natural vegetation, wildlife, human life, economic activity, transport and communication — but it is an asset of finite size, so it must be used with careful planning. India's land is under mountains, plateaus, plains and islands: about 43% is plain (agriculture and industry), 30% mountains (perennial rivers, tourism, ecological balance) and about 27% plateau (rich reserves of minerals, fossil fuels and forests).
Land utilisation. Land use is decided by physical factors (topography, climate, soil) and human factors (population density, technology, culture and traditions). NCERT's categories:
| Group | Categories | What they are |
|---|---|---|
| 1. Forests | Forests | Land classified as forest |
| 2. Not available for cultivation | (a) Barren and waste land · (b) Land put to non-agricultural uses | Rocky, arid, desert land · buildings, roads, railways, factories, settlements |
| 3. Other uncultivated land (excluding fallow) | (a) Permanent pastures and grazing land · (b) Misc. tree crops and groves · (c) Culturable waste land | Grazing land · orchards and groves not counted in net sown area · land left uncultivated for more than 5 agricultural years |
| 4. Fallow lands | (a) Current fallow · (b) Other than current fallow | Left uncultivated for one year or less · for the past 1 to 5 years |
| 5. Net sown area | Net sown area | Physical extent of land sown and harvested; NSA + area sown more than once = gross cropped area |
The pattern. India's geographical area is 3.28 million km², but land-use data exist for only about 93% of it, because land-use reporting is incomplete in most north-eastern states except Assam, and some areas in the far north have not been surveyed (NCERT names them). Fig. 1.4 compares 1960–61 with 2019–20: net sown area hardly moved, from 45.26% to 45.64% of the reporting area. Most older fallow land is of poor quality or costly to cultivate, so it is cropped only once or twice in two or three years; counting such land with the net sown area takes it to about 54%. The share varies greatly between states: over 80% in Punjab and Haryana, under 10% in Arunachal Pradesh, Mizoram, Manipur and the Andaman and Nicobar Islands. Permanent pasture has fallen (4.71% → 3.42%), raising the question of how India feeds its huge cattle population. Forest land (23.41%) is far below the 33% of geographical area set out in the National Forest Policy (1952) as essential for ecological balance — and millions living on forest fringes depend on it.
| Group (our grouping of Fig. 1.4) | 1960–61 (%) | 2019–20 (%) | Change (points) |
|---|---|---|---|
| Forests | 18.11 | 23.41 | +5.30 |
| Not available for cultivation | 16.96 | 14.46 | −2.50 |
| Other uncultivated land | 12.44 | 8.34 | −4.10 |
| Fallow lands | 7.23 | 8.16 | +0.93 |
| Net sown area | 45.26 | 45.64 | +0.38 |
| Total | 100.00 | 100.01 | rounding |
- Fig. 1.3, ‘India: Land under important Relief Features’ (p. 4): a pie in three slices — plains 43%, mountains 30%, plateaus 27%. The point: less than half of India is level plain, which is why plains carry most of its farming and people.
- Fig. 1.4, ‘General land use categories’ (p. 5): two pies, 1960–61 and 2019–20, each of nine slices adding to the reporting area (source printed: Directorate of Economics and Statistics, Ministry of Agriculture and Farmers Welfare, 2023). Redrawn above. The point: net sown area has stalled near 45%; forests and non-agricultural uses gained, barren land and culturable waste lost.
- Activity: compare the two pies and explain why net sown area and forests changed ‘very marginally’. The point: little new land is left to bring under the plough (but see the trap box on forests).
- Find out: reasons for the low net sown area in Arunachal Pradesh, Mizoram, Manipur and the Andaman and Nicobar Islands. The point: relief, forests and climate cap farmland. Outlines in the in-text section.
- Forests did change: 18.11% → 23.41% is +5.30 points, a 29% rise in the share. The activity's ‘very marginally’ and exercise 3(i)'s ‘not increased much’ fit net sown area (+0.38) far better. Safe line: ‘land classified as forest rose from about 18% to 23% of the reporting area between 1960–61 and 2019–20, still well short of the 33% goal’.
- The ‘about 54%’: adding only the ‘other than current’ fallow to net sown area gives 49.31%; adding both fallows gives 53.80%. Safe line: ‘net sown area plus all fallow land is about 54% of the reporting area (2019–20)’.
- Fig. 1.4 shows the reporting area, not the geographical area, and ‘forest’ means land classified as forest in revenue records, not tree cover seen by satellite. As a share of the geographical area, the 2019–20 forest land is only about 21.8% (23.41 × 0.93, our arithmetic).
- The 2019–20 slices add to 100.01% (rounding). The data are for 2019–20; newer Land Use Statistics have been published — check the latest edition before quoting a current figure.
- The 33% goal came in the 1952 National Forest Policy; the 1988 policy kept it (two-thirds of the area in the hills) — Beyond NCERT.
- Reporting area 2019–20: about 306.5 million ha of a geographical area of about 328.7 million ha — 93.2% (from the NCERT Appendix used in legy203; net sown area 139.90 Mha).
- The Forest Survey of India's India State of Forest Report 2023 (released December 2024) put forest cover at about 21.76% of the geographical area and forest plus tree cover at about 25.17% — please verify against the report before use; a newer edition may exist.
- Legy203 carries the full 1950–51 → 2019–20 series and cropping intensity.
5. Land degradation and how to check it
About 95% of our basic needs for food, shelter and clothing come from land. Using land for a long time without measures to conserve and manage it has caused land degradation, with serious effects on society and the environment. Human activities have degraded land directly and have also sped up natural forces that damage it. NCERT ties each cause to the states where it bites hardest:
| Cause | Where NCERT names it | How it degrades land | Remedy NCERT suggests |
|---|---|---|---|
| Mining (with deforestation) | Jharkhand, Chhattisgarh, Madhya Pradesh, Odisha | abandoned pits leave deep scars and overburden; forests cleared | control of mining; proper management of waste land |
| Overgrazing | Gujarat, Rajasthan, Madhya Pradesh, Maharashtra | vegetation stripped, soil loosened and exposed | proper management of grazing; afforestation |
| Over-irrigation | Punjab, Haryana, western Uttar Pradesh | waterlogging → rising salinity and alkalinity | (Beyond NCERT: drainage, gypsum for alkaline soil, drip irrigation) |
| Mineral processing | limestone grinding for cement; calcite and soapstone for ceramics | dust settles on land and slows infiltration of water into soil | control of dust (Beyond NCERT: covered crushing, dust extraction) |
| Industrial effluents | many parts of the country (recent years) | land and water pollution | treat effluents and wastes before discharge and disposal |
| Arid-area degradation | western India | shifting sand, bare land | shelter belts, control of overgrazing, thorny bushes to stabilise sand dunes |
- Punjab's main degradation cause is over-irrigation (waterlogging → salinity), not deforestation or overgrazing (exercise 1(i); UPSC 1988).
- Overgrazing is linked to Gujarat, Rajasthan, MP, Maharashtra; mining to Jharkhand, Chhattisgarh, MP, Odisha. MP appears in both lists.
- Salinisation can make soils impermeable by destroying their structure (UPSC 2011); irrigation over time can salinise farmland (UPSC 2018).
- Mineral dust harms land by slowing infiltration, not by adding nutrients.
- ISRO's Space Applications Centre, Desertification and Land Degradation Atlas of India (2021): about 97.85 million ha — roughly 30% of India's geographical area — was undergoing land degradation in 2018–19 (please verify the exact figure before quoting).
- At the UNCCD COP14 in New Delhi (September 2019) India set a target to restore 26 million ha of degraded land by 2030.
- Bare facts on mining and land in Scheduled Areas: the Samatha judgment (Supreme Court, 1997) on leasing tribal land in Scheduled Areas; the Panchayats (Extension to Scheduled Areas) Act, 1996; the Forest Rights Act, 2006; the Supreme Court's Niyamgiri order (April 2013) asking gram sabhas to decide on a bauxite-mining proposal; the 2015 amendment to the mining law creating District Mineral Foundations for mining-affected areas. Mining and minerals return in jess105.
6. Soil as a resource: how soil forms
Soil is the most important natural resource: the medium of plant growth and home to many living organisms. It is a living system, and it takes millions of years to form soil up to a few centimetres deep. The factors in soil formation are relief, parent rock (bed rock), climate, vegetation and other forms of life, and time. Forces of nature — changes in temperature, running water, wind, glaciers, the work of decomposers — break rock down, and chemical and organic changes in the soil matter as much. Soil holds both organic matter (humus) and inorganic material. India's soils are classified by the factors that formed them and by colour, thickness, texture, age and chemical and physical properties.
- Soil scientists name the layers A (top soil), B (subsoil), C (weathered parent material) and R (bed rock); an O layer of fresh litter sits on top in forests (kegy205).
- Soil Health Card scheme: launched in February 2015 to test farm soils and recommend nutrients and fertiliser doses (UPSC 2017 asked about its aims).
7. The soils of India
Alluvial soil is the most widespread and important. The whole northern plains are made of it, laid down by the Indus, Ganga and Brahmaputra systems; it extends through a narrow corridor into Rajasthan and Gujarat and covers the eastern coastal plains, especially the deltas of the Mahanadi, Godavari, Krishna and Kaveri. It mixes sand, silt and clay; particles are coarse near the break of slope in the upper valleys — piedmont plains such as the Duars, Chos and Terai. By age it is bangar (old alluvium, more kankar nodules) or khadar (new alluvium, more fine particles, more fertile). Alluvial soils are very fertile, mostly with adequate potash, phosphoric acid and lime, ideal for sugarcane, paddy, wheat and other cereals and pulses; alluvial regions are intensively cultivated and densely populated. In drier areas they are more alkaline and need treatment and irrigation.
Black soil — also regur or black cotton soil — is ideal for cotton. Climate together with parent rock forms it; it is typical of the Deccan trap (basalt) region of the north-west Deccan plateau, made of lava flows. It covers the plateaus of Maharashtra, Saurashtra, Malwa, Madhya Pradesh and Chhattisgarh and extends south-east along the Godavari and Krishna valleys. It is extremely fine and clayey, famous for holding moisture, rich in calcium carbonate, magnesium, potash and lime but generally poor in phosphorus. It develops deep cracks in hot weather, which aerate it; it is sticky when wet and hard to work unless tilled just after the first shower or in the pre-monsoon period.
Red and yellow soils develop on crystalline igneous rocks in areas of low rainfall in the eastern and southern Deccan, and also in parts of Odisha, Chhattisgarh, the southern middle Ganga plain and the piedmont of the Western Ghats. The red colour comes from diffusion of iron in crystalline and metamorphic rocks; the soil looks yellow when hydrated.
Laterite soil (Latin later, brick) forms in tropical and subtropical climates with alternate wet and dry seasons, from intense leaching by heavy rain. It is mostly deep to very deep, acidic (pH below 6.0) and generally deficient in plant nutrients; it occurs mostly in the southern states, the Western Ghats region of Maharashtra, Odisha, parts of West Bengal and the north-east. Under deciduous and evergreen forests it is humus-rich; under sparse vegetation in semi-arid conditions, humus-poor. Its position on the landscape makes it prone to erosion. With soil conservation, especially in the hills of Karnataka, Kerala and Tamil Nadu, it grows tea and coffee; red laterite soils in Tamil Nadu, Andhra Pradesh and Kerala suit cashew.
Arid soils are red to brown, generally sandy and saline; in some areas salt is so high that common salt is obtained by evaporating the water. Dry heat speeds evaporation, so they lack humus and moisture. Their lower horizons hold kankar, because calcium increases with depth, and this layer restricts infiltration. With irrigation they become cultivable, as in western Rajasthan. Forest soils occur in hilly and mountain areas with enough rain forests; texture varies with the mountain setting — loamy and silty on valley sides, coarse-grained on upper slopes. In the snow-covered Himalaya they are denuded, acidic and low in humus; in the lower valleys, on river terraces and alluvial fans, they are fertile.
| Soil | Formed from / how | Where (text and map) | Character | Crops (NCERT) |
|---|---|---|---|---|
| Alluvial | river deposits of the Indus, Ganga, Brahmaputra; deltas | northern plains; corridor into Rajasthan, Gujarat; Mahanadi–Godavari–Krishna–Kaveri deltas | sand–silt–clay; coarse near hills; bangar (kankar) and khadar (fertile); potash, phosphoric acid, lime adequate; alkaline in dry areas | sugarcane, paddy, wheat, cereals, pulses |
| Black (regur) | basalt lava of the Deccan trap + climate | Maharashtra, Saurashtra, Malwa, MP, Chhattisgarh; south-east along Godavari, Krishna | clayey; holds moisture; calcium carbonate, magnesium, potash, lime; poor in phosphorus; cracks when dry, sticky when wet | cotton |
| Red and yellow | crystalline igneous rocks, low rainfall | eastern and southern Deccan; parts of Odisha, Chhattisgarh, south of middle Ganga plain, Western Ghats piedmont | red from iron; yellow when hydrated | — |
| Laterite | intense leaching, alternate wet and dry seasons | southern states, Western Ghats of Maharashtra, Odisha, parts of West Bengal, north-east | deep, acidic (pH < 6), nutrient-poor; erosion-prone; humus-rich only under forest | tea, coffee (Karnataka, Kerala, TN hills); cashew (red laterite, TN, AP, Kerala) |
| Arid | dry climate, high evaporation | western Rajasthan | red to brown, sandy, saline; little humus or moisture; kankar layer below | cultivable with irrigation |
| Forest | mountain setting, enough rainfall | hills and mountains; Himalaya | loamy–silty on valley sides, coarse up slope; acidic, low humus under snow; fertile on terraces and fans | — |
- Fig. 1.6, Alluvial soil: a ploughed field of light-brown, furrowed earth. The point: fine, easily worked, deep soil.
- Fig. 1.7, Black soil: dark ground split into a network of deep cracks under an evening sky. The point: clay shrinks and cracks when dry — self-aerating.
- Fig. 1.8, Laterite soil: a reddish, rocky, hard surface along a track between trees. The point: brick-like, leached soil.
- Fig. 1.9, Arid soil: a flat, reddish-brown sandy plain with a few scattered thorny trees under a blue sky. The point: little vegetation, little humus.
- Khadar (new) is more fertile than bangar (old); bangar has more kankar.
- Black soil is poor in phosphorus but rich in lime, potash, magnesium and calcium carbonate; it forms from fissure-erupted basalt (UPSC 2021), not granite.
- Red colour = iron (ferric oxides, UPSC 2010), not humus; yellow = the hydrated form.
- Laterite is acidic and nutrient-poor, not rich in nitrogen and potash; it is not found in Rajasthan and UP; cashew and tapioca do well on it (UPSC 2013).
- The soil of most of Andhra Pradesh is red, not laterite (UPSC 2006 — reason false).
- Arid soils: kankar from calcium increasing with depth (western Rajasthan soils are high in calcium, UPSC 1993).
- Exercise 1(iii): black soil is predominantly in Maharashtra.
- The Indian Council of Agricultural Research's widely quoted grouping has eight major soils: alluvial, black, red and yellow, laterite, arid, saline, peaty (marshy) and forest. NCERT's chapter covers six.
- Laterite is rich in iron and aluminium oxides left behind after leaching — which is why it hardens like brick and is cut for building, and why it is infertile (UPSC 1994).
8. Soil erosion and soil conservation
Soil erosion is the denudation of the soil cover and its washing down. Soil formation and erosion go on together and are usually in balance; human activities — deforestation, overgrazing, construction, mining — upset it, while wind, glaciers and water erode naturally. Running water cuts clayey soils into deep channels called gullies; land unfit for cultivation as a result is bad land, called ravines in the Chambal basin. When water flows as a sheet down a slope and strips the top soil, it is sheet erosion. Wind erosion blows loose soil off flat or sloping land. Defective farming also erodes: ploughing up and down a slope makes channels for fast runoff.
| Method (NCERT) | How it works | Where |
|---|---|---|
| Contour ploughing | ploughing along contour lines slows water flowing down the slope | sloping fields |
| Terrace cultivation | steps cut into slopes restrict erosion | well developed in the western and central Himalayas |
| Strip cropping | large fields divided into strips, with grass left to grow between crops, break the wind's force | windy, open land |
| Shelter belts | lines of trees planted as shelter; stabilise sand dunes | helped stabilise the desert in western India |
- Fig. 1.10, Soil Erosion: a river bank cut into a near-vertical face of pale layered earth, tall grass hanging over the top and water at its foot. The point: running water undercuts and carries away soil, layer by layer.
- Fig. 1.11, Gully Erosion: bare reddish land slashed by deep branching channels. The point: once gullies form, land turns into bad land.
- Terrace cultivation is on slopes of mountains (UPSC 1991); in this chapter's exercise, the terrace-farming state is Uttarakhand, not Punjab, Haryana or the UP plains.
- The Chambal ravines are the work of gully erosion (UPSC 1994). Beyond NCERT: the usual order of water erosion is splash → sheet → rill → gully (UPSC 2001).
- Terrace cultivation checks erosion; it is not a cause of it (UPSC 2014's key names only deforestation; whether a tropical climate also counts is debatable).
- Shelter belts and strip cropping fight wind; contour ploughing and terraces fight water on slopes. Crop rotation, sand fences, terracing and wind breaks are all accepted conservation methods (UPSC 2010).
- Contour bunding: low earth embankments along the contour on gently sloping land, to hold water and soil (UPSC 1982, 2013).
- Check dams and gully plugging stop gullies growing; watershed development combines earthworks, soil conservation and tree planting (legy204).
- Mulching (covering soil with crop residue) and cover crops protect bare soil from rain splash.
In-text questions and activities — answer outlines
Two activity boxes, two ‘Find out’ boxes, an opening question and three questions in the text. Outlines below; numbers recomputed.
p. 1: Name items that make life comfortable in villages and towns, and the materials used to make them.
Activity p. 2, Q1: If the oil supply gets exhausted one day, how would this affect our lifestyle?
Activity p. 2, Q2: Survey attitudes to recycling domestic and agricultural waste.
Activity p. 3: List the resources found in your state and identify important ones it lacks.
Find out p. 3: What resources are being developed in your area by panchayats or ward committees with community participation?
p. 3: Name some resource-rich but economically backward regions and some resource-poor but developed ones. Give reasons.
Activity p. 5: Compare the two pie charts. Why have net sown area and forest land changed so little from 1960-61 to 2019-20?
p. 5: Permanent pasture has decreased. How do we feed our huge cattle population, and what are the consequences?
Find out p. 5: Reasons for the low proportion of net sown area in Arunachal Pradesh, Mizoram, Manipur and the Andaman and Nicobar Islands.
NCERT exercise — answer outlines
Three MCQs, three 30-word and two 120-word questions, and a four-part project. Try first, then open.
1 (i) Main cause of land degradation in Punjab: (a) intensive cultivation (b) deforestation (c) over irrigation (d) overgrazing.
(ii) Terrace cultivation is practised in: (a) Punjab (b) plains of Uttar Pradesh (c) Haryana (d) Uttarakhand.
(iii) Black soil is predominantly found in: (a) Uttar Pradesh (b) Maharashtra (c) Rajasthan (d) Jharkhand.
2 (i) Name three states having black soil and the crop mainly grown in it.
(ii) What type of soil is found in the river deltas of the eastern coast? Give three main features.
(iii) What steps can be taken to control soil erosion in hilly areas?
3 (i) Explain the land use pattern in India and why the land under forest has not increased much since 1960-61.
(ii) How have technical and economic development led to more consumption of resources?
Project 1: Make a project showing consumption and conservation of resources in your locality.
Project 2: Discuss in class how to conserve resources used in your school.
Project 3: Imagine if oil supplies get exhausted — how will this affect our lifestyle?
Project 4: Solve the word puzzle — (i) natural endowments of land, water, vegetation, minerals (ii) a non-renewable resource (iii) soil with high water-retaining capacity (iv) intensively leached soils of the monsoon climate (v) planting trees on a large scale to check soil erosion (vi) the soils the Great Plains are made of.
What to remember
Numbers
One-liners
- A resource needs technology, economics and culture, not just nature.
- Resources are a function of human activity, not free gifts of nature.
- Sustainable development: the present must not compromise the future's needs.
- Agenda 21 came out of Rio 1992; its aim is a local Agenda 21 everywhere.
- Resources without technology and institutions can leave a region backward.
- Net sown area has been stuck near 45% of the reporting area since 1960–61.
- Forest land is about 23% of the reporting area, against a 33% goal.
- Over-irrigation salts the soils of Punjab, Haryana and western UP.
- Black soil comes from Deccan basalt and holds moisture — cotton's soil.
- Laterite is leached, acidic and poor, yet grows tea, coffee and cashew with care.
- Contour ploughing and terraces fight water erosion; shelter belts and strips fight wind.
Traps to avoid
- UPSC 2002 (‘which statement is correct’): the stored key is (c), alluvial soil in the northern plains — but (d) ‘mountains about 30% of area’ is NCERT’s own figure and (b) ‘wells’ is arguable (wells and tube wells supply most irrigation), so treat the key as disputed.
- Forest land rose 5.30 points from 1960–61 to 2019–20 — not ‘very marginally’.
- NSA reaches about 54% only if both kinds of fallow are added; the older fallow alone gives 49.31%.
- Khadar (new alluvium) is more fertile than bangar (old, kankar-rich).
- Black soil is poor in phosphorus.
- Red colour is from iron; yellow is the hydrated form.
- Laterite is acidic and nutrient-deficient, and absent from Rajasthan and UP.
- Fig. 1.4 shows the reporting area (≈ 93%), and ‘forest’ is classified land, not satellite forest cover.
- Agenda 21 is from Rio 1992, not Johannesburg 2002; the Club of Rome did not propose the SDGs.
- Small is Beautiful was first published in 1973, not 1974.
- Stock cannot yet be used; reserves are the usable subset of stock.
- Terrace farming checks erosion; Uttarakhand, not Punjab, is the terrace state.
How to strategise
Prelims — what UPSC asks
- Soils are this chapter's Prelims core: laterite location and crops (1979, 2013), state–soil matching (1988), calcium in western Rajasthan's soils (1993), laterite's iron (1994), alluvium in the northern plains (2002), Andhra's soils (2006), red colour from iron (2010), black cotton soil from fissure basalt (2021), salinisation (2011, 2018).
- Land and conservation: land-use shares (2010), Punjab's salinity (1988), contour bunding and terraces (1982, 1991), conservation methods (2010), gully and ravine erosion (1994, 2001), soil erosion's causes (2014). Sustainability: UNFCCC at Rio (2010), Agenda 21 (2016), Club of Rome and SDGs (2016).
- Learn soils as a grid — formed from, where, character, crops — and the fallow ladder by years. Locate in words; never rely on a remembered map shape.
Mains — where it appears and how to answer
- GS1: human-induced land-use change (2026), desertification without climate boundaries (2020), natural-resource potential of the Deccan trap (2022). Use Fig. 1.4's numbers with their year (2019–20), NCERT's state lists for mining, overgrazing and over-irrigation, and the soil table.
- Set debates out as attributed positions — limits to growth vs ingenuity; small-scale vs heavy industry; mining-led development vs the land and forest rights of local communities (give the laws and judgments as dated facts). No present-day political commentary.
Self-check
Tap an option. NCERT's own exercise questions come first; the rest test the figures and common confusions.
1. Which is NOT one of NCERT's conditions for something to be a resource?
2. Land left uncultivated for more than five agricultural years is:
3. In Fig. 1.4, net sown area in 2019–20 was about what share of the reporting area?
4. Land degradation in Punjab, Haryana and western Uttar Pradesh is caused mainly by:
5. Which statement about alluvial soil is correct?
6. Black soil is:
7. Agenda 21 was adopted at:
UPSC questions from this chapter
Open any question to attempt it in the Question bank — your attempt is saved to your progress.