In the sweltering heat of drought-hit Marathwada, farmer Tukaram Ghamre is working on his land. Beads of sweat melt the flaming-red tilak on his forehead, turning it into a little rivulet running down his nose. But Mr Ghamre, 64, isn't tending to a crop. There is none. The drought, which strikes year after year in this part of central Maharashtra, has forced the elderly farmer into the habit of picking up rocks and stones, removing them one at a time, from the farm where he once grew soybean.