CBSE Class 10 · Resources and Development

Soil Erosion and Soil Conservation Class 10: Causes and Methods

Updated 14 October 2026 · Fact-checked

Soil erosion is the removal of the soil cover and its washing down. Human activities such as deforestation, overgrazing, construction and mining, and natural forces such as water, wind and glaciers, disturb the balance between soil formation and erosion. Gullies, sheet wash and wind remove soil; contour ploughing, terracing, strip cropping and shelter belts conserve it.

Notice how fast water cuts a gully on the bare slope, while terraces and crops slow the water and keep the soil in place.

Illustration drawn for QuestionBuddy.

Understand Soil Erosion and Soil Conservation

What soil erosion is. NCERT describes soil erosion as the denudation of the soil cover and its subsequent washing down. Soil formation and erosion go on at the same time, and usually the two balance each other. Since a few centimetres of soil take millions of years to form, anything that speeds up erosion destroys a resource that cannot be replaced quickly.

What disturbs the balance.

Human activities: deforestation, over-grazing, construction and mining.
Natural forces: wind, glaciers and water.
Defective farming methods: ploughing up and down the slope forms channels through which water flows away fast, carrying soil with it.

Types of erosion in NCERT.
1. Gully erosion: running water cuts through clayey soils and makes deep channels called gullies. The land becomes unfit for cultivation and is called bad land. In the Chambal basin such lands are called ravines (Fig. 1.11).
2. Sheet erosion: water flows as a sheet over large areas down a slope and washes away the top soil.
3. Wind erosion: wind blows loose soil off flat or sloping land.

Notice the difference between gully and sheet erosion: gully erosion cuts deep, narrow channels; sheet erosion strips a thin layer evenly over a wide area. Sheet erosion is easy to miss but it removes the fertile top soil.

Methods of soil conservation. Each method works by slowing down water or wind.

Contour ploughing: ploughing along the contour lines slows the flow of water down slopes. It is the direct correction of the defective up-and-down ploughing.
Terrace cultivation: steps are cut out on slopes to make terraces, which restrict erosion. The western and central Himalayas have well developed terrace farming (for example, Uttarakhand).
Strip cropping: large fields are divided into strips, and strips of grass are left to grow between the crops. These break the force of the wind.
Shelter belts: lines of trees planted to create shelter, working like strips. Shelter belts have helped stabilise sand dunes and the desert in western India.

Choosing a method. Think of where the soil is being lost and what is carrying it away:

steep hill slopes with running water: terraces and contour ploughing;
open, flat, windy land: strip cropping and shelter belts;
areas cut by gullies, such as the Chambal ravines: the land has already become bad land, which is why prevention matters.

Link to the chapter. Soil erosion is one form of land degradation. Resource planning, covered earlier in the chapter, aims to use land so that soil formation and erosion stay in balance and soil remains available for future generations.

Soil Erosion and Soil Conservation: key facts

Soil erosion (definition): Denudation of the soil cover and its subsequent washing down; Formation and erosion normally balance.
Causes: Human: deforestation, over-grazing, construction, mining, defective ploughing; Natural: wind, glaciers, water; Two lists: human and natural.
Gully erosion: Running water cuts deep channels (gullies) in clayey soil -> bad land; ravines in the Chambal basin; Map-linked fact.
Sheet erosion: Water flows as a sheet down a slope over a large area -> top soil washed away; Wide and thin, not deep.
Wind erosion: Wind blows loose soil off flat or sloping land; Checked by strips and shelter belts.
Conservation methods: Contour ploughing (slows water); terrace cultivation (western and central Himalayas); strip cropping (breaks wind); shelter belts (stabilise dunes, western India); Match method to cause.

How to answer Soil Erosion and Soil Conservation questions

Expect MCQs and assertion-reason on terms (gully, ravine, shelter belt), 2-mark 'how to control erosion in hilly areas' questions, 5-mark causes-and-methods answers and 4-mark cases about a farm or village.

1Read where the land is: hill slope, flat windy land, or a river basin with gullies.
2Name the type of erosion from the clue: deep channels (gully), thin layer over a slope (sheet), loose soil blown away (wind).
3Give the cause in two parts: human activity and natural force.
4Match each method to what it stops: water on slopes (contour ploughing, terraces) or wind (strips, shelter belts).
5In 5-mark answers, write two or three causes and two or three methods, each with how it works.

Soil Erosion and Soil Conservation 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.

Contour ploughing versus ploughing down the slope

Imagine two farmers on the same hillside. One ploughs straight up and down the slope; the other ploughs across it, following the curve of the hill. After a heavy shower, the first field has muddy channels and lost soil, while the second looks almost unchanged.

Explain why the two fields lost different amounts of soil, and suggest one more method for this hillside.

Try it first, then show the solutionSolution

Up-and-down furrows act as channels for quick water flow, so soil is washed away.
Furrows along the contours slow water flowing down the slope.
Name the method: contour ploughing.
Add terrace cultivation for steep slopes, as in the western and central Himalayas.

Answer: Ploughing up and down the slope created channels that let rainwater rush downhill, carrying soil with it. Ploughing along the contour lines slowed the water, so less soil was lost; this is contour ploughing. For a steep hillside, cutting steps into terraces would restrict erosion further, as in the western and central Himalayas.

Memory hook: Plough across the hill, and the rain stands still.

Tricks to remember Soil Erosion and Soil Conservation

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

G-S-W
Gully goes deep, Sheet spreads wide, Wind whisks away.
Use it when: Types of erosion.
Water methods vs wind methods
Slope and water: Contour and Terrace (CT scan the hills). Flat and wind: Strips and Shelter belts (SS stops sand).
Use it when: Choosing the right method in case questions.
Chambal = ravines
Bad land of the Chambal has a special name: ravines.
Use it when: MCQs.

Soil Erosion and Soil Conservation: solved examples

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

Example 1: Where terraces are common · 1 mark · MCQBoard level

In which one of the following states is terrace cultivation practised?
(a) Punjab
(b) Plains of Uttar Pradesh
(c) Haryana
(d) Uttarakhand

Try it first, then show the solutionSolution

Terraces are cut on hill slopes; the western and central Himalayas, including Uttarakhand, have well developed terrace farming (1 mark).

Answer: (d) Uttarakhand

Example 2: Control erosion in hilly areas (2 marks) · 2 marks · Very short answerBoard level

Suggest two steps that can be taken to control soil erosion in hilly areas. (2 marks)

Try it first, then show the solutionSolution

Contour ploughing: ploughing along contour lines slows water flowing down the slopes (1 mark).
Terrace cultivation: cutting steps on slopes restricts erosion, as in the western and central Himalayas (1 mark).

Answer: Contour ploughing slows the flow of water down the slopes. Terrace cultivation, cutting steps into slopes as in the western and central Himalayas, restricts erosion.

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

Assertion (A): Ploughing up and down a slope increases soil erosion.
Reason (R): Such ploughing forms channels for the quick flow of water.
(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

The channels carry water and soil quickly downhill; R explains A (1 mark).

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

Example 4: Causes and methods (5 marks) · 5 marks · Long answerHarder board level

'The balance between soil formation and soil erosion is often disturbed.' Explain how, and describe the methods that can restore the balance. (5 marks)

Try it first, then show the solutionSolution

Human activities such as deforestation, over-grazing, construction and mining, and natural forces such as wind, glaciers and water, disturb the balance (1 mark).
Running water forms gullies and bad land (ravines in the Chambal basin); sheet erosion washes top soil; wind blows loose soil; defective up-and-down ploughing adds to it (1 mark).
Contour ploughing along contour lines slows water down slopes (1 mark).
Terrace cultivation on slopes restricts erosion, as in the western and central Himalayas (1 mark).
Strip cropping with grass strips, and shelter belts of trees, break the force of wind; shelter belts have stabilised sand dunes in western India (1 mark).

Answer: Soil formation and erosion normally balance, but deforestation, over-grazing, construction and mining, along with wind, glaciers and water, disturb this. Running water cuts gullies and creates bad land, called ravines in the Chambal basin; sheet erosion strips top soil from slopes; wind blows loose soil away; and ploughing up and down slopes speeds water flow. Balance can be restored. Contour ploughing slows water down slopes. Terrace cultivation, well developed in the western and central Himalayas, restricts erosion. Strip cropping leaves grass strips between crops to break the wind, and shelter belts of trees have stabilised sand dunes and the desert in western India.

Example 5: Case: a windy village · 4 marks · Case-basedHOTS / competency

Read the case and answer the questions.

Suppose a village lies on flat, sandy land in a dry region. Every summer, strong winds lift loose soil from the fields and pile it against walls, and small dunes creep towards the village. The farmers have large, open fields with no trees or hedges between them.

(i) Identify the type of soil erosion described. (1)
(ii) Name one human activity that could have made the problem worse. (1)
(iii) Suggest two conservation methods suited to this village and explain how each works. (2)

Try it first, then show the solutionSolution

(i) Wind erosion (1 mark).
(ii) Deforestation or over-grazing, which removes the plant cover holding soil (1 mark).
(iii) Strip cropping: divide large fields into strips with grass between crops to break the wind (1 mark).
(iii) Shelter belts: rows of trees create shelter and stabilise dunes, as in western India (1 mark).

Answer: (i) Wind erosion. (ii) Deforestation or over-grazing, which removes the plant cover that holds soil in place. (iii) Strip cropping: divide the big fields into strips and grow grass between crops, which breaks the force of the wind. Shelter belts: plant rows of trees as windbreaks; these have helped stabilise sand dunes and the desert in western India.

Example 6: Gully versus sheet erosion (2 marks) · 2 marks · Very short answerHarder board level

Distinguish between gully erosion and sheet erosion. (2 marks)

Try it first, then show the solutionSolution

Gully erosion: running water cuts deep channels in clayey soil, making the land bad land unfit for cultivation (1 mark).
Sheet erosion: water flows as a sheet over large areas down a slope and washes away the top soil (1 mark).

Answer: In gully erosion running water cuts deep channels in clayey soils, turning land into bad land. In sheet erosion water flows as a thin sheet over a large slope and washes away the top soil.

Where students lose marks in Soil Erosion and Soil Conservation

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

Mistake: Listing only human causes
Students forget natural forces.
Wrong working
Soil erosion is caused by deforestation and mining.
Right working
Human activities (deforestation, over-grazing, construction, mining) and natural forces (wind, glaciers, water).
Do this: Write two lists.
Usually costs: 1 mark.
Mistake: Suggesting shelter belts for hill slopes
Methods learnt without their purpose.
Wrong working
Shelter belts stop erosion on Himalayan slopes.
Right working
Terraces and contour ploughing suit slopes; shelter belts and strips break wind.
Do this: Match method to force.
Usually costs: 1 mark in case questions.
Mistake: Defining erosion as 'loss of fertility'
Confusing erosion with degradation in general.
Wrong working
Soil erosion means soil losing nutrients.
Right working
Soil erosion is the denudation of the soil cover and its washing down.
Do this: Use NCERT's definition.
Usually costs: 1 mark.
Mistake: Not explaining how a method works
Students only name methods.
Wrong working
Methods: contour ploughing, terracing.
Right working
Contour ploughing slows water down the slope; terraces restrict erosion on slopes.
Do this: Name plus how it works.
Usually costs: Half marks in 5-mark answers.

Exam tips

In any 'control erosion' question, check the land type first: slope or windy flat land.
Use the Chambal ravines as your example of gully erosion and bad land.
Western and central Himalayas (Uttarakhand) are the NCERT example for terrace farming; western India for shelter belts.
Geography has no 3-mark written answers this year: prepare 2-mark (two methods) and 5-mark (causes plus methods) versions.

Practice questions on Soil Erosion and Soil Conservation

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

Q1 · 1 mark · MCQBoard level
Lands made unfit for cultivation by gullies in the Chambal basin are called:
(a) Terraces
(b) Ravines
(c) Shelter belts
(d) Bangar
Hint
Bad land with a local name.
Answer
(b) Ravines
Q2 · 2 marks · Very short answerBoard level
What are shelter belts, and how have they helped western India? (2 marks)
Hint
Rows of trees.
Answer
Shelter belts are rows of trees planted to create shelter from wind. They have contributed significantly to stabilising sand dunes and the desert in western India.
Q3 · 1 mark · Assertion-reasonHarder board level
Assertion (A): Strip cropping helps reduce soil erosion.
Reason (R): Strips of grass left between crops break up the force of the wind.
(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
How does strip cropping work?
Answer
(a) Both A and R are true, and R is the correct explanation of A.
Q4 · 2 marks · Very short answerHOTS / competency
Suppose a new highway is cut through a forested hill, and the hillside is left bare. Predict two kinds of soil erosion that may follow and suggest one remedy. (2 marks)
Hint
Construction and deforestation; water on slopes.
Answer
With trees removed by construction, rain may wash the top soil off the slope as sheet erosion and cut channels as gully erosion. Cutting terraces or replanting vegetation would slow the water and restrict erosion.
Q5 · 5 marks · Long answerHarder board level
Examine how human activities and defective farming methods cause soil erosion, and evaluate which conservation method suits hills and which suits deserts. (5 marks)
Hint
Causes, then two methods for hills and two for windy dry land.
Answer
Deforestation removes the plant cover that binds soil, over-grazing strips grass, and construction and mining disturb the land, so soil is exposed to water and wind. Defective farming, such as ploughing up and down the slope, makes channels for water to rush down, carrying soil. For hills, contour ploughing slows water along the slope, and terrace cultivation, well developed in the western and central Himalayas, restricts erosion. For deserts and windy plains, strip cropping with grass strips breaks the wind, and shelter belts of trees stabilise dunes, as in western India. So methods must match the force: water on slopes, wind on flat land.
Q6 · 2 marks · Very short answerHOTS / competency
Why is soil erosion described as a serious loss, even though new soil keeps forming? (2 marks)
Hint
How long does soil take to form?
Answer
Soil formation is extremely slow: it takes millions of years to form a few centimetres. Erosion can remove that soil quickly, so once lost, fertile soil cannot be replaced within human time.

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.What is bad land?Show answer
Land made unfit for cultivation by gullies.
2.What is sheet erosion?Show answer
Top soil washed away when water flows as a sheet over large areas down a slope.
3.What is contour ploughing?Show answer
Ploughing along contour lines to slow water flowing down slopes.
4.Where is terrace farming well developed?Show answer
In the western and central Himalayas.
5.What is strip cropping?Show answer
Dividing large fields into strips with grass strips between crops to break the wind.

Soil Erosion and Soil Conservation: frequently asked questions

What are the main causes of soil erosion?

Human activities such as deforestation, over-grazing, construction and mining, natural forces such as wind, glaciers and water, and defective farming methods such as ploughing up and down slopes.

What are the methods of soil conservation in Class 10?

Contour ploughing, terrace cultivation, strip cropping and shelter belts.

What are ravines?

Bad lands formed by gully erosion in the Chambal basin, where running water cuts deep channels through clayey soils.

How do shelter belts help?

Rows of trees break the force of the wind; they have helped stabilise sand dunes and the desert in western India.