Industries of Assam: Refineries and Tea Gardens
Assam's industry is built on two great foundations: what grows in its soil and what lies beneath it. Tea, the crop that made the state famous across the world, supports the largest industry and the largest employer in Assam. Petroleum, first tapped at Digboi, supports four refineries and a growing petrochemical sector. Around these two pillars stand cement plants, paper mills, silk and handloom units and a host of cottage industries. This topic ties the factories and the gardens to the places and dates that examiners love, so it rewards careful memorisation with easy marks.
The tea industry: the largest employer
Tea is the most important industry of Assam and its largest employer. The state has more than 800 tea estates in the organised sector, besides thousands of small tea growers, and it produces about half of India's tea. The oldest tea garden of Assam is the Chabua tea garden in Dibrugarh district. The industry's scientific heart is the Tocklai Tea Research Institute at Jorhat, the oldest tea research institute in the world, established in 1911; because of it Jorhat is called the tea capital of Assam. The Guwahati Tea Auction Centre is the largest tea auction centre of the state, and the public-sector Assam Tea Corporation Limited (ATCL) runs a number of tea gardens. In the Barak valley, tea processing along with jute mills and sugarcane-based units forms the main agro-based industry.
Oil refining and petrochemicals
Assam has four oil refineries. The Digboi refinery is the oldest refinery in India. The Guwahati refinery was established in 1962 by the Indian Oil Corporation (IOC), the Bongaigaon refinery was established in 1979 at Dhaligaon in Chirang district, and the Numaligarh refinery was established in 1999 and is the largest of the four, with a capacity of about 3 million tonnes a year. The state's total installed refining capacity is about 7 million tonnes a year. The Assam Gas Cracker Project at Lepetkata near Dibrugarh, run by BCPL, is the major petrochemical undertaking, and together with the oil fields at Duliajan and Naharkatia it makes the Dibrugarh region the petrochemical hub of Assam.
Paper, cement and other large industries
Among the state's other large industries, the Nagaon Paper Mill of the Hindustan Paper Corporation at Jagiroad is the largest paper mill of Assam. The main cement-producing centres are Bokajan in Karbi Anglong and Umrangso in Dima Hasao, both based on local limestone. The silk industry produces muga, eri and pat textiles and garments, and fertiliser and polymer units have grown up around the natural gas supplied from the oil fields. These industries are concentrated in and around the Brahmaputra valley, where transport, power and raw materials are available together.
Cottage and handloom industries
The main cottage industry of Assam is handloom and handicrafts. Silk weaving, especially of muga and eri, and bamboo and cane crafts are found in almost every district and provide employment to a large number of rural families, especially women. The gamosa and other woven cloths are part of daily life as well as of the economy. Handicrafts made of bamboo, cane, bell metal and brass, and the traditional mask-making of Majuli and Sualkuchi's silk weaving, show how deeply craft is woven into Assamese culture.
How to prepare this topic
- Learn the four refineries with their years: Digboi, Guwahati 1962, Bongaigaon 1979 and Numaligarh 1999.
- Fix the tea centres: Chabua as the oldest garden, Tocklai at Jorhat for research, Guwahati for auctions and ATCL for public-sector gardens.
- Remember that tea is both the most important industry and the largest employer of Assam.
- Link the other industries to places: paper at Jagiroad, cement at Bokajan and Umrangso, petrochemicals at Lepetkata.
- Keep the cottage industries in mind, since handloom and handicrafts are frequently asked as a separate point.
Common exam traps
- The Digboi refinery is the oldest in India, but the Numaligarh refinery is the largest in Assam - oldest and largest are different.
- Tocklai is a research institute, not a garden; Chabua is the oldest garden and Jorhat is called the tea capital.
- The Bongaigaon refinery is at Dhaligaon in Chirang district and was set up in 1979, not in 1962.
- Handloom and handicrafts, not tea, are the main cottage industry; tea is the main organised industry.
Frequently Asked Questions
Which is the most important industry and the largest employer of Assam?
The tea industry is both the most important industry and the largest employer of Assam. The state has more than 800 tea estates in the organised sector, besides thousands of small tea growers, and produces about half of India's tea. The oldest tea garden is the Chabua tea garden in Dibrugarh district, and the industry is supported by the Tocklai Tea Research Institute at Jorhat and the Guwahati Tea Auction Centre.
How many oil refineries are there in Assam and when were they set up?
Assam has four oil refineries. The Digboi refinery is the oldest in India. The Guwahati refinery was established in 1962 by the Indian Oil Corporation, the Bongaigaon refinery in 1979 at Dhaligaon in Chirang district, and the Numaligarh refinery in 1999. The Numaligarh refinery is the largest, with a capacity of about 3 million tonnes a year, and the state's total refining capacity is about 7 million tonnes a year.
Which is the largest paper mill and the main cement-producing centres of Assam?
The largest paper mill of Assam is the Nagaon Paper Mill of the Hindustan Paper Corporation at Jagiroad. The main cement-producing centres are Bokajan in Karbi Anglong and Umrangso in Dima Hasao, both of which use local limestone. The cement industry is therefore directly linked to the mineral deposits of the two hill districts rather than to the plains.
What is the main petrochemical project of Assam and who runs it?
The main petrochemical project of Assam is the Assam Gas Cracker Project at Lepetkata near Dibrugarh, run by Brahmaputra Cracker and Polymer Limited (BCPL). It uses natural gas from the oil fields as its feedstock to produce polymers and plastics. Together with the oil fields at Duliajan and Naharkatia, it makes the Dibrugarh region the petrochemical hub of the state.
What is the main cottage industry of Assam?
The main cottage industry of Assam is handloom and handicrafts, especially silk weaving and bamboo and cane crafts. Silk weaving of muga and eri, the traditional gamosa, and articles of bamboo, cane, bell metal and brass are found in almost every district and give employment to a large number of rural families, particularly women. Handicrafts and handloom are therefore both an economic activity and an important part of Assamese culture.