Classifying industries by inputs: agro, mineral, chemical, forest and animal-based

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Detail

The basis of this classification

• Industries can be grouped in several ways: by size, by ownership, by product, or by inputs/raw materials (what the factory takes in).
• Classed by input, there are five types: agro-based, mineral-based, chemical-based, forest-based and animal-based.
• Why the input matters for location:
• Some inputs rot quickly (perishable). Tea leaf is one. The factory must sit next to the farm.
• Some inputs are bulky or lose weight when processed. Logs and sugarcane are examples. Carrying them far costs a lot, so the factory sits near the source.
• Inputs that are light, valuable or easy to move, such as chemicals and finished fibres, let a factory sit near ports or markets.

Type	Main input	Typical products	Usual location pull
Agro-based	Crops and farm produce	Sugar, tea, juices, oils, cotton/jute/silk textiles, rubber	Near farms (perishable or weight-losing inputs)
Mineral-based	Ores and rocks	Iron and steel, aluminium, copper, jewellery, cement, pottery	Near mines or on cheap transport routes
Chemical-based	Petroleum, salts, sulphur, potash, wood and coal chemicals	Petrochemicals, synthetic fibres, plastics	Near refineries and ports
Forest-based	Timber, bamboo, grass, lac	Furniture, paper, lac goods	Near forests (bulky inputs)
Animal-based	Hides, skins, wool, ivory	Leather footwear and goods, woollens	Near livestock areas and old craft towns

(a) Agro-based industries

• Agro-based industries are factories that turn field and farm produce into finished goods. They sell to both rural and urban markets.
• Main groups:
• Food processing: sugar, pickles, fruit juices.
• Beverages: tea, coffee, cocoa.
• Spices.
• Oils and fats.
• Textiles: cotton, jute, silk.

• Rubber.

• Food processing means changing raw food into a form that lasts longer or is ready to eat.

• Modern forms: canning (sealing food in airtight tins), making cream, fruit processing and confectionery (sweets and chocolates).
• Ancient forms: drying, fermenting (letting microbes change the food, as in curd or idli batter) and pickling (keeping food in salt, oil or vinegar).

• Before the Industrial Revolution (the shift to machine-made goods that began in 18th-century Britain), these old methods met only limited demand. They served local households, not mass markets.

• The Nilgiri tea factory (NCERT Fig. 5.5):

• The Nilgiri hills are in Tamil Nadu, where the Western and Eastern Ghats meet.
• Why the factory sits inside the tea garden:
  • Fresh tea leaf is perishable. It starts to wilt and lose quality within hours.
  • So it must be withered, rolled, fermented and dried at once.
  • The result: the factory is built inside the garden itself. This is a classic case of a raw-material-oriented location.

• The same logic applies to sugar mills, which sit near cane fields. Cut sugarcane loses its sugar content quickly and is bulky.

• Agri-business (commercial farming run like an industry, with high capital input) is taught under primary activities, not here.

• The problem and policy in India:
• India is a giant producer of milk, fruits and vegetables. But only a small share of this output is processed, so a large part is wasted after harvest.
• The Ministry of Food Processing Industries (MoFPI) runs the Pradhan Mantri Kisan SAMPADA Yojana (PMKSY). This is an umbrella scheme, meaning one big scheme that holds several smaller ones.
• Mega Food Parks are one part of PMKSY. A mega food park is a cluster with shared cold storage, warehouses and processing units, set up in a farm-rich zone.
• The aim is to link the farm gate to the retail shop and raise the share of output that is processed.

(b) Mineral-based industries

• Mineral-based industries use minerals dug from the earth as their main input. NCERT splits them into three groups:

Mineral group	Meaning	Example inputs	Industries
Ferrous	Metallic minerals that contain iron	Iron ore (with manganese, coking coal, limestone as helpers)	Iron and steel
Non-ferrous	Metallic minerals without iron	Bauxite, copper ore, gold, silver	Aluminium, copper, jewellery
Non-metallic	Minerals that are not metals	Limestone, gypsum, clay	Cement, pottery

• Exam trap: cement is mineral-based (non-metallic), not chemical-based. Aluminium is non-ferrous, even though it is a metal.
• Many of these inputs lose weight when processed. For example, a lot of ore becomes a little metal. So the plants often sit near mines, such as iron and steel plants on the Chota Nagpur plateau in India.

(c) Chemical-based industries

• Chemical-based industries use natural chemical minerals, or chemicals taken out of wood and coal, to make new substances.
• Natural chemical minerals used:
• Mineral oil (petroleum): the base of the petrochemical industry.
• Salts: used for soda ash and caustic soda.
• Sulphur: used for sulphuric acid.

• Potash: used for fertilisers.

• Chemicals from other sources: wood (for example, wood pulp for rayon) and coal (for example, coal tar for dyes).

• Key products: synthetic fibres (man-made fibres such as nylon and polyester) and plastics.

The petrochemical industry

• Petrochemicals are chemicals made from crude oil and natural gas. NCERT lists the petrochemical industry among the world's most important industries.
• The process:
• Crude oil is refined. This gives gases and light liquids such as naphtha.
• These are "cracked" (broken into small molecules) into building-block chemicals.

• The building blocks are joined into end products.

• End products:

• Plastics.
• Synthetic fibres and synthetic rubber.
• Fertilisers.
• Dyes.

• Drugs (pharmaceuticals).

• Why it clusters near refineries and ports:

• Its inputs come straight from refineries.
• Crude oil arrives by tanker.
• Its products are exported by sea.

Cluster	Country	Setting
US Gulf Coast (Houston)	USA (Texas)	Gulf of Mexico coast, on top of oil and gas fields
Rotterdam–Antwerp	Netherlands–Belgium	Rhine–Meuse–Scheldt delta ports on the North Sea; Europe's largest cluster
Jubail	Saudi Arabia	Persian Gulf coast; uses cheap Gulf oil and gas
Jurong Island	Singapore	Island off south-west Singapore, built by joining smaller islands and filling the sea with land; on the Strait of Malacca shipping route
Jamnagar	India (Gujarat)	Gulf of Kutch coast; refinery-cum-petrochemical complex
Vadodara (Koyali)	India (Gujarat)	Inland refinery with a petrochemical belt around it
Mumbai	India (Maharashtra)	Port city with refineries at Trombay

• Pattern: India's petrochemical belt is heavily concentrated on the west coast, especially Gujarat. This is close to the Bombay High and Gujarat oil fields and to West Asian crude imports.

(d) Forest-based industries

• Forest-based industries use forest products as their raw material.
• Inputs and their industries:
• Timber → furniture.
• Wood, bamboo and grass → paper (through pulp, a soft, wet mass of plant fibre).

• Lac → the lac industry. Lac is a resin (sticky natural substance) given out by the tiny lac insect on trees. It is used in varnish, bangles and sealing wax.

• Why the mills sit near forests:

• Logs, bamboo and grass are bulky and low in value for their weight.
• So it is cheaper to process them at the source.

• The result: pulp and paper mills sit inside forest belts.

• World examples:

• Ketchikan, Alaska (USA), about 55°N on the Pacific coast, has a pulp mill (NCERT Fig. 5.6).
• Scandinavia (Sweden, Finland, Norway) and Canada have vast coniferous (taiga) forests of soft wood such as pine and spruce. This wood is ideal for pulp.

(e) Animal-based industries

• Animal-based industries use products from animals.
• Inputs and products:
• Leather (from hides and skins) → footwear and leather goods.
• Wool (from sheep) → woollen textiles.

• Ivory (from elephant tusks) → carvings and ornaments.

• Ivory is now banned:

• CITES stands for the Convention on International Trade in Endangered Species of Wild Fauna and Flora. It was signed in 1973. It is a global treaty that controls trade in wild animals and plants.
• Appendix I of CITES is its strictest list: commercial trade is banned.
• In 1989, after heavy poaching, CITES moved the African elephant to Appendix I. This banned the international ivory trade.

• India bans the domestic ivory trade under the Wildlife (Protection) Act, 1972.

• India's leather clusters:

Cluster	State	Note
Kanpur	Uttar Pradesh	Tanneries on the Ganga (Jajmau area)
Agra	Uttar Pradesh	Leather footwear hub
Chennai–Vellore–Ambur	Tamil Nadu	Tanning and footwear belt along the Palar valley
Kolkata	West Bengal	Major tanning centre

• Problem: tanning uses chromium salts. Untreated waste from tanneries pollutes rivers such as the Ganga at Kanpur and the Palar in Tamil Nadu.

Prelims Hooks

• Cement and pottery are mineral-based (non-metallic) industries, not chemical-based.
• Aluminium, copper and jewellery use non-ferrous minerals. Iron and steel is the only ferrous example.
• Synthetic fibres and plastics come from chemical-based industries. Cotton, jute and silk textiles are agro-based.
• Rubber is classed as an agro-based input (plantation crop). Lac is a forest-based input.
• A Nilgiri tea factory sits inside the garden because tea leaf is perishable. The Nilgiris are in Tamil Nadu.
• The pulp mill shown by NCERT is at Ketchikan, Alaska.
• CITES: signed 1973. The African elephant was put on Appendix I in 1989, which banned the international ivory trade.
• Petrochemical cluster–country pairs: Jubail–Saudi Arabia; Jurong Island–Singapore; Houston–USA; Rotterdam–Netherlands; Koyali–Vadodara (Gujarat).
• Leather cluster–state pairs: Kanpur and Agra–Uttar Pradesh; Ambur and Vellore–Tamil Nadu; Kolkata–West Bengal.
• Ancient food-processing methods: drying, fermenting and pickling. Modern methods include canning and confectionery.

Mains Points

• Inputs shape location (GS-I):
• Perishable inputs (tea leaf, sugarcane) and bulky inputs (logs, bamboo, ore) pull factories to the source. Examples are Nilgiri tea factories, Scandinavian and Canadian pulp mills, and steel plants near mines.

• Imported, easy-to-move inputs pull factories to the coast. Examples are petrochemical hubs at Houston, Rotterdam, Jubail, Jurong and Jamnagar.

• Low food processing in India (GS-III):

• Little processing means post-harvest losses, low farm incomes and few rural jobs.

• The policy response is MoFPI's PMKSY umbrella scheme. Its parts include Mega Food Parks, cold chains and agro-processing clusters, which link the farm gate to the market.

• Petrochemicals as a core industry:

• They feed plastics, textiles, fertilisers and drugs.
• India's coastal clusters in Gujarat and Maharashtra build on refinery capacity and port access.

• They raise concerns about plastic waste and coastal pollution.

• Animal-based industries and the environment:

• Leather clusters at Kanpur and Ambur create jobs and exports but pollute rivers with chromium waste.
• The CITES (1989) and Indian bans on ivory show conservation limiting an old industry.