 You can read more about the trip in the news section of porkcheckoff.org. Pat Bain, a member of the NPB Board of Directors. Could the United States farmers be on track to once again be the world's number one source of corn? Last year, Brazil surpassed the United States in total corn exports. Joanna Colosi, University of Illinois, says this is because the Chinese government opened its market to the South American nation.