In Assam there is tea industry, petro-chemicals, fertilizers and oil refining units; the labour for this is attracted from Chhota Nagpur, Bihar, U.P, M.P and Tamil Nadu. The plantations are situated in the districts of Cachar, Darrang, Sibsagar and Lakhimpur. Bulk of these has now been permanently settled. In kerala, rubber and coffe estates as well as cashew processing, coir manufacture, fertililers, petro chemicals, oil refining and ship building industries get most of their labour supply from Tamil Nadu. In breef “The small and medium size industrial centers depend up on the surrounding rural areas for the supply of all unskilled labour.