USDA REPORTS 350,000 TONNES CORN TO UNKNOWN The U.S. Agriculture Department said private U.S. exporters reported sales of 350,000 tonnes of corn for delivery to unknown destinations during the 1986/87 marketing season. The marketing year for corn began September 1. This is the second day running that exporters have reported corn sales to unknown destinations. Yesterday, they reported sales of 150,000 tonnes to unknown.