 Reserve sheets on sale now at iowastatefair.org and the Iowa State Fair Ticket Office. Convenience fees apply to all tickets. Don't miss Brett Young Live. September corn up 2.5 at $3.96. August soybeans down 9.75 at $11.21. August soybean meal down $4.90 at $3.40. August soybean oil down a penny at $4.96. On the Merc.