The Times of India dated 14.09.2011 (page 21)
Government pushes for Dalit biz ventures
Centre to make compulsory 4% buys from them

The centre is set to make it compulsory for 4% of its annual purchases to be made from units run by Dalits and tribals in what will be rough estimate of the disposal spending comes to Rs 25,000 crores.
It is to be noted that govt is providing a loan to SC/ST at concessional rate of 4% to start their own business.