Puerto Rico helped fuel America’s corn boom. Some locals see an unfair arrangement.

Puerto Rico helped fuel America’s corn boom. Some locals see an unfair arrangement.

More than a third of the world’s corn supply comes from America’s Corn Belt, a region of sprawling grain fields stretching from Nebraska to Ohio.  But most of the seed varieties planted in those midwestern fields were first tested and researched in Puerto Rico, the small Caribbean island that has sacrificed much of its own agricultural resources to meet the growing needs of major U.S. crop producers.  Several seed companies and researchers use f…