What happened
During the takeoff roll, the pilot of the aircraft realized that the plane might not achieve flight. In an attempt to lighten the weight, the pilot dumped the chemical load, which allowed the airplane to begin to liftoff.
As the aircraft departed the runway surface, the right main gear struck a stone fence post located at the end of the runway. Following the impact, the pilot reduced power and transitioned the aircraft into an adjacent pasture, where it touched down and skidded to a stop. The pilot was not injured.
The conditions on the grass runway were reported as soft and wet, with grass height measuring approximately 6 inches. At the time of the accident, there was light fog and high humidity. Weather observations from a station 29 nautical miles southeast of the site indicated winds of 200 degrees magnetic at 18 knots, a temperature of 79 degrees Fahrenheit, and a dew point of 68 degrees Fahrenheit.