The National Cooperative Dairy Federation of India will buy 7,500 tonne de-oiled rice bran and 2,450 tonne rice polish through a reverse electronic auction on Tuesday. Rice polish is the outer layer of a kernel of rice, which is removed during polishing. The commodities, used as cattle feed, will be bought on behalf of the Kerala Co-operative Milk Marketing Federation. The National Cooperative Dairy Federation of India, which has nearly 200 dairy cooperatives as members, has developed an online trading platform to purchase feed stock and sell dairy products.