USDA forecasts U.S. corn production at 15.3 billion bushels, up 278 million from the July projection.  The season’s first survey-based corn yield forecast, at a record 181.8 bushels per acre, is 3.3 bushels higher than last month’s trend-based projection.  Today’s Crop Production report indicates that Illinois, Indiana, Iowa, Missouri, Nebraska, and Ohio are forecast to have yields above a year ago, with record-high yields expected for Minnesota and South Dakota.  Feed and residual use is raised because of lower expected prices.  Exports are higher reflecting U.S. export competitiveness and relatively low world market prices.  With supply rising more than use, ending stocks are raised 108 mil...