In the most recent "Commitment of Traders" report, most of the open interest for butter was "short." With butter in such short supply, how that could be is hard to fathom.
However, back in 2002 USDA released a report of a study on forward contracting (read that as "risk Management") http://www.ams.usda.gov/AMSv1.0/getfile?dDocName=STELDEV3004563
Oddly enough, the results of USDA's own study is that farmers lost money with futures. So,why is USDA not looking at the cause of volatility.