With the Iowa/Iowa State game at the end of the week, Knoxville Farmers’ Market organizer Kathy Priest is challenging Hawkeye and Cyclone fans to out-do each other in a penny war. Fans will vote with change during the Farmers’ Market on Tuesday and Saturday. Silver coins will be counted toward their squad and pennies counted against the other team. The money being raised will be donated to the Marion County Humane Society. Priest says this is a great chance to support both your team and a good cause.