Labourers sift harvested wheat in a field on the outskirts of the western Indian city of Ahmedabad March 14, 2013. India is holding firm to a price of $300 a tonne for its wheat despite falling global prices, setting the scene once again for piles of rotting grain, even though it needs to feed its half-a-billion poor. REUTERS/Amit Dave (INDIA - Tags: BUSINESS FOOD AGRICULTURE)