Washington Farmer's Alfalfa Rejected as Being Genetically Modified, via The Guardian Thurs. Sept. 12, 2013.

"...a new suspected case of crop contamination on Thursday– after samples of hay tested positive for genetically modified traits.
...a farmer in Washington state reported that his alfalfa shipments had been rejected for export after testing positive for genetic modification. Results were expected as early as Friday."

http://www.rawstory.com/rs/2013/09/12/genetic-modification-blamed-for-rejected-washington-alfalfa-crop/