 KNOX Newsradio 1310. It's another great day in fertile Minnesota at the Polk County Fair. You'll always find daily free stage events, the talent contest, and the PRCA Rodeo in front of the grandstands start at 7 p.m. tonight. Baja Racing Friday and Saturday and Sunday. It's the Super Demo Derby and fireworks starting at 1030. You won't want to miss the Polk County Fair in fertile Minnesota, the home of family fun.