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The revised purchase price of 1,735 rupees ($26.66) per 100 kg compares with 1,625 rupees a year ago, Radha Mohan Singh said in a tweet.
India, the world's second-biggest rice and wheat producer, buys the grain from local farmers at state-set prices to build stocks to run a major food welfare programme which covers about 75 percent of its 1.3 billion people.