The June data shows that the trend toward larger U.S. exports is already underway, but current export sales volumes for 2016/17 provide a way to add some quantitative parameters. So far, though, markets have not given the changing export outlook the consideration it probably deserves. A forthcoming sharp boost in export demand for U.S. corn, soybeans and even wheat has been the subject of discussion here for the past few months. Official U.S. Census Bureau data for June shows that such increases are well underway. Soybean exports totaled 37 million bushels, the largest volume for that month in four years. Brazilian and Argentine exports have dominated the world soybean trade in recent years, at least until U.S. new crop availability in Sept...