There wasn’t a big yellow caution light flashing during last week’s Iowa Farm Bureau Federation (IFBF) Economic Sum­mit in Ames, but it felt like there was.

Economic expert after expert warned the farmers and others in the audience at Iowa State University’s (ISU) Scheman Auditorium that the times truly are changing for U.S. agriculture, and not for the better.

Long-term global food demand is expected ...