EconomicsICSE Class 9 · Secondary Sector: Industry

Meaning of Industry, Interdependence with Agriculture and Types of Industries (ICSE Class 9 Economics)

Updated 18 October 2026 · Fact-checked

Industry (manufacturing) is the secondary sector: it converts raw materials into finished or semi-finished goods of greater value. Agriculture and industry depend on each other for raw materials, inputs, markets and jobs. By scale, industries are large, medium, small-scale and cottage; cottage industries are home-based with family labour and simple tools, while large industries use heavy capital, many workers and modern machines.

Notice the two-way arrows: farms feed factories with raw materials, and factories give farms inputs, processing and jobs, so each grows with the other.

Illustration drawn for QuestionBuddy.

Understand Meaning of Industry, Interdependence with Agriculture and Types of Industries

Meaning. Industry is the economic activity of converting raw materials into finished or semi-finished goods with the help of labour, machines and power, so that they have greater value and use. Examples: cloth from cotton, sugar from sugarcane, steel from iron ore, furniture from wood.

Interdependence of agriculture and industry.
Agriculture helps industry: it supplies raw materials to agro-based industries (cotton, jute, sugarcane, oilseeds, milk), food to industrial workers, and a large market for industrial goods (fertilisers, tractors, pumps, consumer goods).
Industry helps agriculture: it supplies inputs (fertilisers, pesticides, tractors, pumps, pipes, harvesters), processes, stores and transports farm produce so that farmers get better prices, and absorbs surplus labour from agriculture, reducing disguised unemployment and raising rural incomes.
So the two grow together: a bad harvest hurts agro-industries, and a slump in industry reduces the demand for farm inputs and rural jobs.

Large scale industries. Huge capital, a large number of workers (often thousands), modern heavy machinery and mass production for national and international markets; usually run by companies with professional management; located in industrial towns or near raw materials. Examples: iron and steel plants, automobile manufacturing, cement, petroleum refining, heavy engineering, shipbuilding.

Medium scale industries. They lie between large and small industries in investment, workforce and output, use modern machinery on a moderate scale and serve regional or national markets. Examples: a pharmaceutical formulations unit, a mid-sized garment exporter, an auto-components maker, a food-processing plant.

Cottage industries. Carried on by artisans at home, mainly with family members, using simple tools, small capital, local raw materials and skills; full-time or part-time. Examples: handloom weaving, pottery, basket and mat making, khadi spinning, carpet weaving, wood carving, pickle and papad making.

Small-scale industries. Run in small workshops or factories with hired workers, small power-driven machines and limited capital under one owner or a few partners; they often work as ancillary units supplying parts to large industries. Examples: soap and candle making, leather footwear, plastic goods, bicycle parts, sports goods, readymade garments.

Cottage versus small-scale. Place and labour (home and family versus workshop and hired workers); technology (hand tools versus power-driven machines).

Neighbouring topics: the significance of small industries, pollution, deforestation, afforestation and waste management are on the next page of this chapter.

Meaning of Industry, Interdependence with Agriculture and Types of Industries: key facts

Industry: Raw materials to finished goods
secondary sector
adds value; Examples: cotton to cloth.
Interdependence: Agriculture gives raw materials, food, market | industry gives inputs, processing, jobs; Two-way link.
Four scales: Large
medium
small-scale
cottage; By capital, workers and technology.
Cottage versus small-scale: Cottage: home, family labour, hand tools | small-scale: workshop, hired labour, power machines; Two main points.

Meaning of Industry, Interdependence with Agriculture and Types of Industries 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.

A poor cotton harvest

Suppose a drought sharply reduces the cotton crop of a district with several textile mills.

How does this show the interdependence of agriculture and industry?

Try it first, then show the solutionSolution

The mills receive less raw material, so they may run below capacity.
Farmers earn less and buy fewer tractors, fertilisers and goods.
Industry and rural jobs both suffer.

Answer: Both sectors are hit: industry loses raw material and farmers lose income, so each depends on the other.

Memory hook: Bad harvest, slow mills.

Tricks to remember Meaning of Industry, Interdependence with Agriculture and Types of Industries

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

RIM-J
Raw materials, Inputs, Market, Jobs: the links between farm and factory.
Use it when: Interdependence.
Cottage at home
Cottage industries work at home with family hands.
Use it when: Cottage industries.
Large means heavy
Large scale: heavy capital, many workers, big machines.
Use it when: Large scale features.

Meaning of Industry, Interdependence with Agriculture and Types of Industries: solved examples

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

Example 1: Cottage industry · 1 mark · MCQBoard level

A cottage industry is typically run:
(a) in a big factory with thousands of workers (b) at home with family members (c) only by the government (d) only for export

Try it first, then show the solutionSolution

Cottage industries use family labour at home and simple tools.

Answer: (b) at home with family members

Example 2: Classify by scale · 3 marks · Short answerHarder board level

Classify each industry as large scale, medium scale, small-scale or cottage: (i) an iron and steel plant; (ii) a family making pottery at home; (iii) a soap unit with a dozen hired workers and a small power machine; (iv) an auto-components maker serving the national market.

Try it first, then show the solutionSolution

(i) Large scale: heavy capital and many workers. (ii) Cottage: home-based with family labour. (1 mark)
(iii) Small-scale: workshop, hired workers and power-driven machine. (1 mark)
(iv) Medium scale: moderate investment serving regional or national markets. (1 mark)

Answer: (i) large (ii) cottage (iii) small-scale (iv) medium

Example 3: Chain of effects · 3 marks · Short answerHarder board level

Explain the effects on industry and on farmers of a very poor sugarcane crop, to show interdependence.

Try it first, then show the solutionSolution

Sugar mills get less sugarcane, so their output and jobs fall. (1 mark)
Farmers earn less and buy fewer inputs such as fertilisers and pumps. (1 mark)
So a setback in agriculture reduces industrial demand and output as well. (1 mark)

Answer: Sugar mills lose raw material; farmers lose income and cut purchases of industrial inputs.

Example 4: Case study: village and factory · 4 marks · Case-basedHOTS / competency

Suppose a village grows cotton which a mill turns into cloth. The mill's owners also run a plant that makes fertilisers and tractors that farmers buy, and the mill employs workers from the village who used to be partly idle on small farms.
(i) Name the agro-based industry. (1)
(ii) Name two inputs industry supplies to agriculture here. (1)
(iii) What does the employment of idle workers show? (2)

Try it first, then show the solutionSolution

(i) The cotton textile mill.
(ii) Fertilisers and tractors.
(iii) Industry absorbs surplus labour from agriculture, reducing disguised unemployment and raising rural incomes.

Answer: (i) the textile mill (ii) fertilisers and tractors (iii) it reduces disguised unemployment

Example 5: Large scale industries · 3 marks · Short answerHarder board level

State three features of large scale industries, give two examples and explain why they are called capital-intensive.

Try it first, then show the solutionSolution

Features: heavy investment, a large number of workers and mass production with modern machinery (any three). (1 mark)
Examples: iron and steel, cement, shipbuilding, automobile manufacturing (any two). (1 mark)
They use a great deal of capital (machinery) for each worker, which is why they are capital-intensive. (1 mark)

Answer: Heavy capital, many workers and mass production; e.g. steel and cement; capital-intensive because of heavy machinery.

Where students lose marks in Meaning of Industry, Interdependence with Agriculture and Types of Industries

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

Mistake: Describing only one side of the link
Only agriculture helping industry is written.
Wrong working
Agriculture supplies raw materials
Right working
Agriculture supplies raw materials; industry supplies inputs, processing and jobs
Do this: Write both directions.
Usually costs: 1 to 2 marks
Mistake: Mixing cottage and small-scale
Both are small.
Wrong working
Cottage industries use hired workers
Right working
Cottage industries use family labour at home
Do this: Remember home and family.
Usually costs: 1 mark
Mistake: Examples without type
Only names are given.
Wrong working
Steel, pottery
Right working
Steel (large); pottery (cottage)
Do this: Match the example with the scale.
Usually costs: 1 mark

Exam tips

Always give one example for each type of industry.
For interdependence, use two headings: agriculture helps industry; industry helps agriculture.
Use the words raw material, input, market and jobs.
State cottage industries as home-based and family-run.

Practice questions on Meaning of Industry, Interdependence with Agriculture and Types of Industries

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
Which of these is a large scale industry?
(a) pottery at home (b) automobile manufacturing (c) papad making (d) basket making
Hint
Heavy capital.
Answer
(b) automobile manufacturing
Q2 · 2 marks · Very short answerBoard level
What is meant by industry? Give two examples.
Hint
Raw materials to goods.
Answer
Industry is the conversion of raw materials into finished or semi-finished goods; examples are cloth from cotton and sugar from sugarcane.
Q3 · 3 marks · Short answerHarder board level
Name two agro-based industries with the farm product each uses, and two industrial goods that farmers buy.
Hint
Raw materials and inputs.
Answer
Sugar mills use sugarcane and jute mills use jute; farmers buy fertilisers and tractors (or pumps and pesticides).
Q4 · 3 marks · Short answerHarder board level
One family makes pickles at home with its own members and sells them locally. Another has set up a unit with five hired workers and a power-driven grinder. Classify each and justify.
Hint
Look at place, labour and machines.
Answer
The first is a cottage industry: home-based, family labour and simple tools. The second is a small-scale industry: a workshop with hired workers and a power-driven machine.
Q5 · 3 marks · Short answerHOTS / competency
How does the growth of industry reduce disguised unemployment in agriculture?
Hint
Where do surplus workers go?
Answer
When more workers are on a farm than needed, some add nothing to output. Industry offers them jobs, so they leave the farm, output on the farm does not fall and their incomes rise; this reduces disguised unemployment.

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.Which sector is industry?Show answer
The secondary sector.
2.Give an agro-based industry.Show answer
Sugar, textiles, jute or oil mills.
3.Name a cottage industry.Show answer
Handloom weaving or pottery.
4.Name a large scale industry.Show answer
Iron and steel.
5.Do small-scale industries use hired labour?Show answer
Yes.
6.What is an ancillary unit?Show answer
A small unit that supplies parts or components to a large industry.

Meaning of Industry, Interdependence with Agriculture and Types of Industries: frequently asked questions

Is a medium scale industry in the syllabus?

Yes, with meaning, features and examples only.

Are limits for MSMEs required?

No. The government sets and revises them; no figures are needed in Class IX.

Is food processing industry or agriculture?

Processing is an industry; growing the crop is agriculture.