 And 2023 trials showed a 14-bushel increase in corn. Reduce stresses and shield your yield with Heat Shield from Hefty Naturals. This Tuesday, July 2nd, it's a huge night of racing at River City Speedway with $15 Fan Appreciation Night. See double features of the NOSA Outlaw Sprints. Also racing late models, A-Mods, Midwest Mods, and Street Stocks.