The pilot in the tail-wheel equipped airplane reported that he accomplished an approach to land on a grass airstrip. During the approach he avoided powerline wires and buildings that were located at the approach end of what he perceived to be the runway. Prior to the landing flare he realized that what he perceived as the runway was a wheat field. The airplane's main landing gear became entangled with the wheat stocks and the airplane impacted the ground. The airplane nosed over and came to rest inverted. Substantial damage was sustained to the engine mounts, the rudder, the vertical stabilizer and the wing strut.

The pilot reported that there were no preaccident mechanical malfunctions or failures with the airplane that would have precluded normal operation.