The pilot reported that there had been light rain in the morning prior to the flight and when he took off from the turf airstrip to conduct an aerial application flight, the turf was wet from the rain. Following applying fertilizer to a nearby cornfield, the pilot returned to the airstrip to land. After the main landing gear and tailwheel touched down and as the pilot applied brakes to steer, the airplane skidded, and the right wing struck cornstalks in the adjacent field. The airplane then ground-looped and rolled over. The airplane sustained substantial damage to the fuselage and left wing and aileron. The pilot reported that there were no other preaccident mechanical failures or malfunctions with the airplane that would have precluded normal operation, and that there were no mechanical malfunctions with the brake system.