U.S. soybean supplies were expected to balloon 43 percent in the 2015/16 marketing year, despite a drop in production, as U.S. soybeans face increased competition on the export market. In its first estimate of the supply situation for the 2015/16 marketing year, the U.S. Agriculture Department projected U.S. soybean ending stocks at 500 million bushels, up from 350 million bushels in the 2014/15 crop year.