What happened
Earlier in the day, the pilot had been conducting spraying operations from a paved runway. Later that morning, the operation was moved to a sod airstrip that was wet and soft. In an effort to account for the condition of the surface, the pilot reduced the chemical load on the agricultural aircraft.
During the initial takeoff roll, the aircraft encountered a soft spot on the runway. As a result, the plane was unable to reach flying speed. The pilot responded by jettisoning the chemical load and attempting to abort the takeoff. Despite these actions, the airplane rolled off the departure end of the 2150-foot runway and into an adjacent field. The pilot was not injured.