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Classification of Soils in India Class 10 Notes

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Social ScienceCBSE Class 10 · Resources and Development

Classification of Soils in India Class 10: Types, Features and Map

Updated 14 October 2026 · Fact-checked

India's soils are classified by formation factors, colour, thickness, texture, age and properties into six types: alluvial, black, red and yellow, laterite, arid and forest soils. Alluvial soil covers the northern plains and is the most widespread; black soil suits cotton on the Deccan trap; laterite forms by heavy leaching; arid soil is sandy and saline.

Understand Classification of Soils in India

Soil as a resource. Soil is the most important natural resource: the medium of plant growth that supports many living organisms. It is a living system, and it takes millions of years to form soil up to a few cm deep. Factors of soil formation: relief, parent rock (bed rock), climate, vegetation and other life forms, and time. Forces such as temperature change, running water, wind, glaciers and decomposers help, along with chemical and organic changes. Soil contains organic matter (humus) and inorganic material. Soil profile (Fig. 1.5): top soil, subsoil (weathered rocks, sand, silt, clay), substratum (weathered parent rock material) and unweathered parent bed rock.

Indian soils are classified by formation factors, colour, thickness, texture, age, and chemical and physical properties. India's varied relief, landforms, climates and vegetation have produced six main types.

1. Alluvial soil: most widespread and important.

  • The entire northern plains; deposited by the Indus, Ganga and Brahmaputra systems; extends into Rajasthan and Gujarat through a narrow corridor; also in the eastern coastal deltas of the Mahanadi, Godavari, Krishna and Kaveri.
  • Sand, silt and clay in varying proportions. Coarse near the break of slope in piedmont plains such as Duars, Chos and Terai.
  • By age: bangar (old alluvium, more kankar nodules) and khadar (new alluvium, finer particles, more fertile).
  • Very fertile, with enough potash, phosphoric acid and lime: ideal for sugarcane, paddy, wheat, cereals and pulses. So these regions are intensively cultivated and densely populated. Drier areas have more alkaline soil that becomes productive with treatment and irrigation.

2. Black soil (regur, black cotton soil).

  • Formed by climate together with parent rock; typical of the Deccan trap (basalt) region of the north-west Deccan plateau, made of lava flows.
  • Covers the plateaus of Maharashtra, Saurashtra, Malwa, Madhya Pradesh and Chhattisgarh, and extends south-east along the Godavari and Krishna valleys.
  • Extremely fine, clayey; holds moisture well; rich in calcium carbonate, magnesium, potash and lime; poor in phosphoric content.
  • Develops deep cracks in hot weather, which aerate the soil; sticky when wet, so it must be tilled right after the first shower or in the pre-monsoon period. Ideal for cotton.

3. Red and yellow soils.

  • Red soil forms on crystalline igneous rocks in low-rainfall areas of the eastern and southern Deccan plateau; red and yellow soils also occur in parts of Odisha, Chhattisgarh, the southern middle Ganga plain and the piedmont zone of the Western Ghats.
  • Red colour from the diffusion of iron in crystalline and metamorphic rocks; yellow when hydrated.

4. Laterite soil.

  • From the Latin 'later', meaning brick. Forms in tropical and subtropical climates with alternate wet and dry seasons, by intense leaching due to heavy rain.
  • Deep to very deep, acidic (pH below 6.0), generally poor in nutrients. Found mostly in southern states, the Western Ghats of Maharashtra, Odisha, parts of West Bengal and the North-east.
  • Humus-rich under deciduous and evergreen forest, humus-poor under sparse vegetation; prone to erosion.
  • With soil conservation in the hills of Karnataka, Kerala and Tamil Nadu it grows tea and coffee; red laterite soils of Tamil Nadu, Andhra Pradesh and Kerala suit cashew nut.

5. Arid soil.

  • Red to brown, sandy and saline; in some areas so salty that common salt is obtained by evaporating water.
  • Dry climate and high temperature speed evaporation, so it lacks humus and moisture. Kankar lies in the lower horizons because calcium increases downwards, and it restricts infiltration of water.
  • Becomes cultivable with proper irrigation, as in western Rajasthan.

6. Forest soil.

  • In hilly and mountainous areas with enough rain forests. Texture varies with the environment: loamy and silty on valley sides, coarse-grained on upper slopes.
  • In the snow-covered Himalaya, denuded, acidic and low in humus; fertile in lower valleys, on river terraces and alluvial fans.

Map work. The 2026-27 syllabus lists 'Identify: Major Soil Types' on the map of India (Fig. 'India: Major Soil Types'). Practise recognising each soil region from its location.

Classification of Soils in India: key facts

Soil formation factors
Relief, parent rock, climate, vegetation and other life, time; plus temperature change, running water, wind, glaciers, decomposers
A few cm of soil takes millions of years.
Alluvial
Northern plains + eastern deltas; bangar (old, kankar) vs khadar (new, fertile); potash, phosphoric acid, lime; sugarcane, paddy, wheat
Most widespread soil.
Black (regur)
OriginDeccan trap basalt
AreasMaharashtra, Saurashtra, Malwa, MP, Chhattisgarh
Textureclayey, moisture-retentive, cracks
Rich incalcium carbonate, magnesium, potash, lime
Poor inphosphorus
Cropcotton
Also called black cotton soil.
Red and yellow
Crystalline igneous rocks, low rainfall, eastern and southern Deccan; red from iron diffusion, yellow when hydrated
Also Odisha, Chhattisgarh, Western Ghats piedmont.
Laterite
'later' = brick; intense leaching; acidic pH < 6.0; nutrient-poor; tea and coffee (Karnataka, Kerala, TN hills), cashew (red laterite)
Needs conservation.
Arid
Red to brown, sandy, saline; lacks humus and moisture; kankar layer restricts infiltration; cultivable with irrigation (western Rajasthan)
Forest
Hills and mountains; loamy-silty on valley sides, coarse on upper slopes; acidic and low humus in snowy Himalaya
Fertile on river terraces and alluvial fans.

How to answer Classification of Soils in India questions

Soil questions come as MCQs and assertion-reason, 2-mark answers (features or areas of one soil), 5-mark comparisons, 4-mark cases and map identification. Each soil answer has four parts: formation, features, areas, crops.

  1. 1Identify the soil from clues: 'regur', 'cracks', 'cotton' mean black; 'leaching', 'brick', 'acidic' mean laterite; 'kankar', 'saline' mean arid; 'bangar', 'khadar' mean alluvial.
  2. 2Write formation first (river deposits, lava, leaching, crystalline rock).
  3. 3Give two or three properties: texture, moisture, nutrients present and lacking.
  4. 4Name areas exactly as NCERT does, then the crops.
  5. 5For comparisons, use the same heads for both soils so the examiner can tick matching points.
  6. 6In map questions, think of location: northern plains (alluvial), north-west Deccan (black), eastern and southern Deccan (red), Western Ghats and hills of the south (laterite), western Rajasthan (arid), Himalaya (forest).

Classification of Soils in India in real life

The idea, met in an everyday situation. Answer the question in your own words, then compare with the model answer. The one-line hook is what to remember.

Black soil and its tilling time

Suppose a farmer in Malwa waits until the middle of the monsoon to plough his fields, and finds the soil so sticky that his plough gets stuck.

Explain why this happened and when he should plough instead.

Try it first, then show the solutionSolution
  1. Identify the soil: Malwa has black soil.
  2. Recall the property: black soil is clayey and sticky when wet.
  3. Recall the advice: till immediately after the first shower or in the pre-monsoon period.
  4. Add the helpful property: cracks in hot weather aerate the soil.

Answer: Malwa has black soil, which is made of very fine clayey material. When it is wet it becomes sticky and hard to work. The farmer should till right after the first shower or in the pre-monsoon period. The deep cracks that form in hot weather help aerate the soil before ploughing.

Memory hook: Black soil: plough before it turns to glue.

Tricks to remember Classification of Soils in India

Short memory aids. Say each one aloud once, then use it on a question the same day.

  • A-B-R-L-A-F

    Alluvial, Black, Red and yellow, Laterite, Arid, Forest: 'A Big Red Lorry Always Forward'.

    Use it when: Listing the six soil types.

  • Bangar is Bigger in age

    Bangar = old (more kankar); Khadar = new and finer, more fertile.

    Use it when: Alluvial soil MCQs.

  • Laterite = Leached + Latin brick

    Two L's: Leaching and 'Later' (brick).

    Use it when: Laterite formation questions.

  • Black lacks P

    Black soil is rich in calcium carbonate, magnesium, potash and lime but Poor in Phosphorus.

    Use it when: Assertion-reason on nutrients.

Classification of Soils in India: solved examples

Ordered from board level to HOTS. Try each one before you open the solution.

Example 1: Identify the soil · 1 mark · MCQBoard level

Which soil develops due to intense leaching caused by heavy rainfall in areas with alternate wet and dry seasons?
(a) Alluvial soil
(b) Black soil
(c) Laterite soil
(d) Arid soil

Try it first, then show the solutionSolution
  1. Intense leaching under tropical and subtropical alternate wet and dry seasons produces laterite soil (1 mark).

Answer: (c) Laterite soil

Example 2: Black soil features (2 marks) · 2 marks · Very short answerBoard level

Name any two states where black soil is found and state two features that make it suitable for cotton. (2 marks)

Try it first, then show the solutionSolution
  1. States: Maharashtra and Madhya Pradesh (also Chhattisgarh; the plateaus of Saurashtra and Malwa) (1 mark).
  2. Features: clayey, with high capacity to hold moisture; rich in calcium carbonate, magnesium, potash and lime (1 mark).

Answer: Black soil is found in Maharashtra and Madhya Pradesh. It is made of fine clayey material that holds moisture well and is rich in calcium carbonate, magnesium, potash and lime, which suits cotton.

Example 3: Assertion-reason: alluvial regions · 1 mark · Assertion-reasonHarder board level

Assertion (A): Regions of alluvial soil are intensively cultivated and densely populated.
Reason (R): Alluvial soils are very fertile and contain adequate potash, phosphoric acid and lime.
(a) Both A and R are true, and R is the correct explanation of A.
(b) Both A and R are true, but R is not the correct explanation of A.
(c) A is true, but R is false.
(d) A is false, but R is true.

Try it first, then show the solutionSolution
  1. NCERT links the high fertility directly to intensive cultivation and dense population (1 mark).

Answer: (a) Both A and R are true, and R is the correct explanation of A.

Example 4: Compare black and laterite soil (5 marks) · 5 marks · Long answerHarder board level

Distinguish between black soil and laterite soil on the basis of formation, texture and moisture, nutrient content, areas and crops. (5 marks)

Try it first, then show the solutionSolution
  1. Formation: black soil from climate and parent rock in the Deccan trap basalt (lava flows); laterite from intense leaching by heavy rain in alternate wet and dry seasons (1 mark).
  2. Texture and moisture: black soil is fine and clayey, holds moisture, cracks in hot weather; laterite is deep to very deep and prone to erosion (1 mark).
  3. Nutrients: black soil is rich in calcium carbonate, magnesium, potash and lime but poor in phosphorus; laterite is acidic (pH < 6.0) and generally deficient in nutrients (1 mark).
  4. Areas: black soil on the plateaus of Maharashtra, Saurashtra, Malwa, MP and Chhattisgarh; laterite in southern states, Western Ghats of Maharashtra, Odisha, parts of West Bengal and the North-east (1 mark).
  5. Crops: black soil for cotton; laterite, with conservation, for tea and coffee, and red laterite for cashew (1 mark).

Answer: Black soil forms from climate acting on basalt parent rock of the Deccan trap; laterite forms by intense leaching from heavy rain in alternating wet and dry seasons. Black soil is fine and clayey, holds moisture and cracks in hot weather; laterite is deep and easily eroded. Black soil is rich in calcium carbonate, magnesium, potash and lime but poor in phosphorus; laterite is acidic and generally poor in nutrients. Black soil covers the plateaus of Maharashtra, Saurashtra, Malwa, Madhya Pradesh and Chhattisgarh; laterite occurs in the southern states, the Western Ghats of Maharashtra, Odisha, parts of West Bengal and the North-east. Black soil grows cotton; laterite, with conservation, grows tea, coffee and cashew.

Example 5: Case: a soil that needs water · 4 marks · Case-basedHOTS / competency

Read the case and answer the questions.

Suppose a soil scientist digs a pit in a dry western district. The top layers are sandy and red to brown. A white crust of salt appears on the surface after the sun dries a puddle. Lower down, she hits a hard layer of kankar, and water poured on top drains very slowly beyond it. Yet she notes that fields close by, which receive canal water, carry healthy crops.

(i) Identify the soil type. (1)
(ii) Why does this soil lack humus and moisture? (1)
(iii) Explain why the kankar layer forms and how the nearby fields show that this soil can still be productive. (2)

Try it first, then show the solutionSolution
  1. (i) Arid soil (1 mark).
  2. (ii) The dry climate and high temperature make evaporation faster (1 mark).
  3. (iii) Calcium content increases downwards, so kankar forms in the lower horizons and restricts infiltration (1 mark).
  4. (iii) With proper irrigation arid soil becomes cultivable, as in western Rajasthan; the canal-fed fields show this (1 mark).

Answer: (i) Arid soil. (ii) The dry climate and high temperature cause fast evaporation, so the soil lacks humus and moisture. (iii) Calcium content rises with depth, forming a kankar layer in the lower horizons that blocks water from soaking down. Still, proper irrigation makes arid soil cultivable, as in western Rajasthan, which is why the canal-fed fields are productive.

Example 6: Map: identify a soil type · 1 mark · Map workBoard level

On an outline map of India, a region is shaded covering the plateaus of Maharashtra, Malwa and Saurashtra and extending south-east along the Godavari and Krishna valleys. Identify the soil type shown. (1 mark)

Try it first, then show the solutionSolution
  1. The north-west Deccan plateau with these extensions is the Deccan trap region of black (regur) soil (1 mark).

Answer: Black soil (regur).

Example 7: Why alluvial soils vary (2 marks) · 2 marks · Very short answerHarder board level

Explain how alluvial soils differ according to grain size and age. (2 marks)

Try it first, then show the solutionSolution
  1. Grain size: coarse in the upper reaches near the break of slope, as in the piedmont plains of Duars, Chos and Terai (1 mark).
  2. Age: bangar (old) has more kankar nodules; khadar (new) has more fine particles and is more fertile (1 mark).

Answer: Near the break of slope in piedmont plains such as Duars, Chos and Terai the soil is coarse. By age, old bangar has more kankar nodules, while new khadar has finer particles and is more fertile.

Where students lose marks in Classification of Soils in India

The slips examiners see most often, and what to write instead.

  • Mistake: Swapping bangar and khadar

    Both are alluvial and sound alike.

    Wrong working

    Khadar is old alluvium with kankar nodules.

    Right working

    Bangar is old alluvium with more kankar; khadar is new and more fertile.

    Do this: Bangar is Bigger (older).

    Usually costs: 1 mark.

  • Mistake: Saying black soil is rich in phosphorus

    Students list every nutrient as present.

    Wrong working

    Black soil is rich in phosphoric content.

    Right working

    It is generally poor in phosphoric content.

    Do this: Black lacks P.

    Usually costs: 1 mark in assertion-reason.

  • Mistake: Writing that laterite is fertile

    It grows tea and coffee.

    Wrong working

    Laterite is rich in nutrients, so tea grows well.

    Right working

    Laterite is nutrient-poor and grows tea and coffee only after conservation.

    Do this: Always add 'after soil conservation'.

    Usually costs: 1 mark.

  • Mistake: Vague areas

    Writing 'in the south' or 'in the north'.

    Wrong working

    Black soil is found in south India.

    Right working

    Plateaus of Maharashtra, Saurashtra, Malwa, Madhya Pradesh and Chhattisgarh.

    Do this: Use NCERT's named regions.

    Usually costs: 1 mark per answer.

Exam tips

  • For any one soil, write formation, features, areas and crops: four ready points.
  • Learn the clue words for each soil: they turn MCQs and case questions into quick marks.
  • Practise the soil map in the NCERT book: the 2026-27 map list asks you to identify major soil types.
  • Geography has no 3-mark answers this year, so prepare each soil both as a crisp 2-mark answer and as part of a 5-mark comparison.

Practice questions on Classification of Soils in India

Write each answer on paper first. Open the hint only if you are stuck, and the answer only when you have finished.

  1. Q1 · 1 mark · MCQBoard level

    In which one of the following states is black soil predominantly found?
    (a) Uttar Pradesh
    (b) Maharashtra
    (c) Rajasthan
    (d) Jharkhand

    Hint

    Deccan trap.

    Answer

    (b) Maharashtra

  2. Q2 · 2 marks · Very short answerHarder board level

    Why do red soils look red, and why do they sometimes appear yellow? (2 marks)

    Hint

    Iron and water.

    Answer

    Red soil develops a reddish colour because of the diffusion of iron in crystalline and metamorphic rocks. It looks yellow when it occurs in a hydrated form.

  3. Q3 · 1 mark · Assertion-reasonHarder board level

    Assertion (A): Laterite soil is useful for growing tea and coffee in the hilly areas of Karnataka, Kerala and Tamil Nadu.
    Reason (R): Laterite soil is naturally rich in plant nutrients and never needs conservation.
    (a) Both A and R are true, and R is the correct explanation of A.
    (b) Both A and R are true, but R is not the correct explanation of A.
    (c) A is true, but R is false.
    (d) A is false, but R is true.

    Hint

    What does laterite need before it grows tea and coffee?

    Answer

    (c) A is true, but R is false. Laterite is generally deficient in nutrients and becomes useful only after soil conservation.

  4. Q4 · 2 marks · Very short answerHOTS / competency

    Suppose you are advising a farmer who has land on the delta of the Krishna river. What soil does the farmer have, and which crops would you suggest? Justify. (2 marks)

    Hint

    Eastern coastal deltas.

    Answer

    Alluvial soil, found in the deltas of the Mahanadi, Godavari, Krishna and Kaveri. It is very fertile with adequate potash, phosphoric acid and lime, so paddy, sugarcane, cereals and pulses suit it.

  5. Q5 · 5 marks · Long answerHarder board level

    Explain the factors responsible for soil formation, and describe the layers of a soil profile. (5 marks)

    Hint

    Five factors, natural forces, changes, then four layers.

    Answer

    Soil forms over millions of years; even a few centimetres take that long. The main factors are relief, parent rock, climate, vegetation and other life, and time. Natural forces such as changes in temperature, running water, wind, glaciers and decomposers break down rock, and chemical and organic changes in the soil are equally important. Soil contains organic matter (humus) and inorganic material. A soil profile has top soil (the upper layer), subsoil of weathered rocks, sand, silt and clay, a substratum of weathered parent rock material, and unweathered parent bed rock at the bottom.

  6. Q6 · 2 marks · Very short answerHOTS / competency

    Analyse why black soil needs to be tilled immediately after the first shower, and how its cracks help the farmer. (2 marks)

    Hint

    Sticky when wet; cracks in heat.

    Answer

    Black soil is clayey and becomes sticky and difficult to work when wet, so it should be tilled after the first shower or before the monsoon. Its deep cracks in hot weather aerate the soil.

  7. Q7 · 1 mark · MCQBoard level

    Which soil type is found in the snow-covered areas of the Himalayas and is acidic with low humus?
    (a) Laterite soil
    (b) Forest soil
    (c) Arid soil
    (d) Red soil

    Hint

    Mountain soils.

    Answer

    (b) Forest soil

Test your recall

Answer in your head or on paper first, then open the card. Pulling an answer out of memory makes it stick far better than re-reading.

  1. 1.Which rivers deposited the alluvial soil of the northern plains?Show answer

    The Indus, the Ganga and the Brahmaputra systems.

  2. 2.What is another name for black soil?Show answer

    Regur soil, or black cotton soil.

  3. 3.What does the Latin word 'later' mean?Show answer

    Brick.

  4. 4.Why does arid soil have a kankar layer?Show answer

    Calcium content increases downwards.

  5. 5.What crop do red laterite soils of Tamil Nadu, Andhra Pradesh and Kerala suit?Show answer

    Cashew nut.

  6. 6.What is the pH of laterite soil?Show answer

    Acidic, below 6.0.

Classification of Soils in India: frequently asked questions

How many types of soil are there in India according to Class 10 Geography?

Six: alluvial, black, red and yellow, laterite, arid and forest soils.

Which is the most widespread soil in India?

Alluvial soil, which covers the entire northern plains and the eastern coastal deltas.

Why is black soil called black cotton soil?

Because it is ideal for growing cotton: it holds moisture well and is rich in calcium carbonate, magnesium, potash and lime.

Is the soil map in the 2026-27 syllabus?

Yes. The map list asks students to identify the major soil types of India on an outline map.