8-8-12 (Redwood Falls, MN)  --  The candidates for U-S Senate squared-off on agriculture issues today in a debate at Farmfest near Redwood Falls.  They were asked, should the renewable fuel standard be waived for the rest of 2012 and 2013?  Democrat Amy Klobuchar says no -- that it's been really important for Minnesota as one of the top producers of renewable fuels.  But Republican U-S Senate candidate Kurt Bills says the renewable fuel standard has jump-started that industry as intended, and now should be phased out.  Independence candidate Glen Menze (MEN-zee) says there should be flexibility on the renewable fuel standard, but the government needs to be consistent so farmers can plan.