While U.S. farmland values soared during the big bull market that lasted from 2006 through 2013, all good things must end. However, the overall declines have certainly not matched the drop in grain and oilseed prices or subsequent poor returns per acre.U.S. farmland values soared during the big bull market that lasted from 2006 through 2013. Record-high crop prices coupled with generally good yields took returns per acre to record-high levels as well. Low interest rates during this period made it easy to finance expensive land. There are, of course, many anecdotal stories about what happened to land values across the country. Red River farmland values (eastern North Dakota) quadrupled by most accounts during this bull run, and there were re...