As some of the GM maize varieties grown in the US are not approved in countries of export (EU, Japan...) farmers in the corn belt struggle with keeping this GM harvest out of the export chain.</p><p><a href="http://www.usatoday.com/tech/news/techinnovations/2003-08-25-biotech-crops_x.htm" target = "_blank" >USATODAY.com - Industry struggles with handling of biotech crops</a>