The countryside changes from rolling hills to table-top flat farmland as you approach the Hato Raton farm about an hour west of Seville, Spain, where farm manager Francisco Javier Hernandez heartily welcomed a group of Iowa Farm Bureau members.

"We are very proud that you are here. We have a lot of affection for you," Hernandez told two bus loads of Iowa farmers who visited the farm. The farm hired a film crew...