CBSE Class 10 Social Science Manufacturing Industries Notes Set 03

These CBSE Class 10 Geography notes for Chapter 6 Manufacturing Industries cover how industry and agriculture support each other, industrial location factors, how industries are classified (by raw material, capital investment, ownership, role, and bulk), agro-based industries (cotton and jute textiles, sugar), and mineral-based industries (iron and steel, aluminium smelting).

Industry and Agriculture

Industry contributes to agriculture by supplying inputs such as fertilisers and pesticides, and modern machinery that modernises and mechanises farming, reducing input costs over time; this also helps raise agricultural production while making production processes more efficient.

The manufacturing sector is considered the backbone of general and economic development, though its share of India's GDP has stagnated at about 17% (out of 27% for industry as a whole, including 10% for mining, quarrying, electricity and gas) — much lower than East Asian economies, where it reaches 25-35%. Achieving a desired growth rate of over 12% over the next decade depends on renewed efforts by industry to improve productivity, alongside appropriate government policy, for which the National Manufacturing Competitiveness Council (NMCC) has been set up.

Industrial Location

Industrial location is influenced by: availability of raw material; capital; power; market; government policies; skilled or unskilled labour, as the industry requires; and proximity to transit corridors, railway stations and ports (e.g. Cochin, Mumbai, Chennai). Since it is difficult to find all these factors together in one place, industries are set up where most are available, or can be arranged at the lowest cost.

Urbanisation and industrialisation reinforce each other: industries locate near cities for their market for manufactured goods, and for services such as banking, insurance, transport, labour consultancy and financial advice. Many industries cluster together to benefit from these shared advantages, forming "agglomeration economies" — for example, the diamond industry cluster in Surat. The decision to locate a factory at a given site weighs the cost of obtaining raw materials there, the cost of production at that site, and the cost of distributing the finished product.

Classification of Industries

By raw material:

Agro-based industries: use raw material from agriculture — e.g. cotton, woollen, jute and silk textiles, rubber, sugar, tea, coffee, edible oil.
Mineral-based industries: use raw material from minerals — e.g. iron and steel, aluminium, cement, machine tools, petrochemicals.

By capital investment:

Large-scale industry: owned or operated by a chain of businesses, employing a large workforce, with investment above Rs 10 crore — e.g. the Maruti Suzuki plant in Manesar.
Small-scale industry: owned and run by individuals or small groups, employing fewer workers, with investment below Rs 10 crore — e.g. an automobile spare-parts shop.

By ownership:

Private sector industries: owned and operated by individuals or firms — e.g. Bajaj, Tisco.
Public sector industries: owned and operated by government agencies or their subsidiaries — e.g. BHEL, SAIL.
Joint sector industries: owned jointly by the state and private firms — e.g. Gujarat Alkalies Ltd., Oil India Ltd.
Co-operative sector industries: involve multiple stakeholders, such as state governments, private industry and raw material suppliers — e.g. Amul, the coir industry in Kerala.

By role:

Basic industries: supply raw material for other finished products — e.g. cocoa and coffee beans used to produce chocolate and coffee powder.
Consumer industries: convert raw material into goods consumed directly by people — e.g. sugarcane processed into sugar, mustard and sesame seeds into vegetable oil.

By bulk and weight of material:

Heavy industries: use heavy raw material to produce goods — e.g. iron and steel, shipbuilding, aeronautical industries.
Light industries: use light raw material — e.g. electrical goods, the bamboo industry.

Agro-Based Industries

The Textile Industry

One of India's oldest industries; the first successful textile mill was established in Mumbai in 1854. India is the world's fifth-largest textile producer. The industry contributes about 2.3% to GDP and 12% of India's total exports; it is highly labour-intensive, employing about 45 million people, second only to agriculture in employment, and is India's only industry that is self-reliant and complete across its entire value chain, from fibre production through spinning, weaving/knitting, dyeing and finishing, to garment manufacture.

Cotton Textiles

Historically produced by hand spinning and handloom weaving, now largely replaced by power looms since the Industrial Revolution. India is one of the world's largest producers and exporters of cotton yarn. The industry was traditionally concentrated in the cotton-growing belt of Maharashtra and Gujarat, thanks to the availability of raw cotton, market access, transport (including accessible ports), and labour in a moist climate. The industry has strong links to agriculture, providing employment for cotton ball pluckers and workers in ginning, with spinning concentrated in Maharashtra, Gujarat and Tamil Nadu, and weaving spread across India to draw on traditional regional skills, along with dyeing, designing, packaging, tailoring and sewing. India exports cotton yarn to Japan, the USA, the UK, Russia, France, Eastern Europe, Nepal, Singapore, Sri Lanka and African countries.

Challenges facing the cotton textile industry: high-quality Indian yarn often cannot be fully used by India's own weaving, knitting and processing units; most factories are small and fragmented, serving only local markets, with few large, modern ones; erratic power supply; outdated machinery; insufficient investment in processing; low labour productivity; and stiff competition from synthetic fibres. As a result, Indian spinners often export cotton yarn while garment manufacturers are forced to import fabric.

Value is added at every stage, from fibre to yarn (about Rs 85/kg) to processed fabric to a finished garment (about Rs 800/unit) — illustrating why strengthening the weaving sector, rather than simply exporting raw yarn, matters: it would add more value within India, boosting GDP, creating more jobs, and making India more self-reliant, as it was before Independence.

Jute Textiles

India is the world's largest producer of raw jute and jute goods, and the second-largest exporter after Bangladesh. The first jute mill was set up near Kolkata, at Rishra, in 1855. Jute production is concentrated along the banks of the Hugli river in West Bengal, due to proximity to jute-growing areas, cheap water transport, a good rail/road/waterway network, abundant water for processing, and cheap labour from West Bengal and neighbouring Bihar, Odisha and Uttar Pradesh; Kolkata, as a large urban centre, also provides banking, insurance and port facilities for exports.

Challenges: competition from synthetic substitutes internationally; competition from Bangladesh, Brazil, the Philippines, Egypt and Thailand; limited mechanisation; and limited technological upgrading. Internal demand has recently grown due to a government policy mandating jute use for packaging, and rising global interest in environmentally friendly, biodegradable materials; the National Jute Policy of 2005 aimed to raise productivity, quality, yield per hectare, and fair remuneration for jute growers. The industry could be further boosted by stimulating demand through favourable policy, and by diversifying products beyond basic jute packaging (bags, baskets, etc).

Sugar Industry

India is the world's second-largest sugar producer, and ranks first in gur and khandsari production. The industry is seasonal. Major hubs are in Maharashtra, Karnataka, Tamil Nadu, Andhra Pradesh, Gujarat, Punjab, Haryana and Madhya Pradesh, though about 60% of mills remain in Uttar Pradesh and Bihar. Mills have increasingly shifted toward southern and western states, especially Maharashtra, because sugarcane there has a higher sucrose content than in the north, the cooler climate allows a longer crushing season, and cooperative societies have been very successful there.

Challenges: the seasonal nature of sugarcane; outdated production methods; transport bottlenecks between farms and factories; and the need to make better use of bagasse (the leftover fibre). The industry has recently received a boost from new uses for its by-products, including government-encouraged ethanol production and sanitiser production.

Mineral-Based Industries

Industries using minerals and metals as raw material are called mineral-based industries. Iron and steel is considered a heavy industry since both raw materials and finished goods are heavy and bulky, incurring high transport costs.

Iron and Steel Industry

A core industry, since many other industries directly depend on it — for example, steel is used to manufacture engineering goods, construction materials, defence equipment and automobile parts. A country's steel production and consumption are treated as an index of its economic development. India ranks second in the world for crude steel production, and is the largest producer of sponge iron, while China is the world's largest steel producer and consumer. Producing steel requires iron ore, coking coal and limestone in a ratio of roughly 4:2:1. The process runs: transporting raw material to the plant; the blast furnace, where iron ore is melted (with limestone added as a flux and slag removed, while coke is burnt to heat the ore); the resulting molten material poured into moulds, called "pigs", producing pig iron; pig iron further purified by melting and oxidising impurities, with manganese, nickel and chromium added, to make steel; and the metal shaped by rolling, pressing, casting and forging.

The Chota Nagpur plateau region has India's greatest concentration of iron and steel plants, thanks to low-cost iron ore, high-grade raw materials located close together, cheap labour, and strong growth potential in the Indian market. Major steel plant sites include Burnpur and Durgapur (West Bengal), Bokaro and Jamshedpur (Jharkhand), Rourkela (Odisha), Bhilai (Chhattisgarh), Vishakhapatnam (Andhra Pradesh), Vijayanagar and Bhadravati (Karnataka), and Salem (Tamil Nadu).

Challenges: the high cost and limited availability of coking coal (India's main coal types, lignite and peat, are of lower grade); lower labour productivity; erratic electricity supply; and poor infrastructure. The industry has been gaining momentum due to government policy interventions, liberalisation and foreign direct investment, and growing private sector participation, with further potential from greater investment in research, development and the latest global technology.

Aluminium Smelting

India's second most important metallurgical industry, using bauxite — a bulky, dark reddish rock — as its raw material; roughly 4 to 6 tonnes of bauxite yield 2 tonnes of alumina, which in turn yield 1 tonne of aluminium. Its location is mainly influenced by a regular electricity supply and access to raw material at minimum cost. Aluminium is light, corrosion-resistant, a good conductor of heat, malleable, and adds strength when alloyed with other metals. Production runs from the bauxite quarry (raw material), to an aluminium refinery (bauxite crushed, alumina dissolved out), to the aluminium smelter, where a molten electrolyte (cryolite), electricity (about 18,600 kWh per tonne of ore), and calcined petroleum coke (from a refinery) and pitch (from a colliery) are used, with bulk ore transported to the smelter site by rail or ship. Aluminium's main uses are in manufacturing aircraft, utensils and wires, and as a substitute for steel, copper, zinc and lead in various industries. Major aluminium smelting plants are located in Odisha, West Bengal, Kerala and Uttar Pradesh.