The National Cooperative Dairy Federation of India bought 600 tonne rice polish through an online auction on Thursday. The commodity, used as cattle feed, was bought on behalf of the Kerala Co-operative Milk Marketing Federation. Rice polish is the outer layer of a kernel of rice which is removed during polishing. 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.