On June 10, 1996, about 1245 central daylight time, a Rockwell International S-2R, N8428V, registered to a private owner and leased to the Glen Allan Flying Service, Inc., was substantially damaged on landing at a private airstrip near Wayside, Mississippi. Visual meteorological conditions prevailed at the time and no flight plan was filed for the 14 CFR Part 137 aerial application flight. The commercial-rated pilot was not injured. The flight originated about 10 minutes earlier from the private airstrip located near the spray location. The pilot stated that he had previously dumped about 45-50 loads of fish food into a pond. After dumping a load he returned for landing to the north with the wind from the southwest at 5 miles per hour. The right main landing gear collapsed after a hard landing and the airplane veered off the right side of the runway completing a 180-degree turn collapsing the left main landing gear. The airplane came to rest upright.