The harvest in the largest grower will jump 30 percent to 14.036 billion bushels (356.5 million metric tons), the average of 27 analyst estimates compiled by Bloomberg shows. Thatâ??s 53 million bushels more than they expected a month ago and 86 million above the governmentâ??s July forecast. Record crops from the U.S. to Brazil to Ukraine will expand world inventories by 23 percent to 152.36 million tons in a year, according to the average of 12 predictions.