The pilot was returning to his home airfield after a local flight. The pilot stated, “My pattern was a little extended so my final approach was longer and brought me in a little low. I increased power then reduced same as I reached the runway threshold. My altitude at the time of my power reduction was below the treeline.” The airplane sustained substantial damage to its left wing when it impacted terrain and came to rest in a plowed field about 100 feet from the end of the runway. The pilot reported that the airplane flew through pockets of turbulence during the approach and that caused the loss of airplane control. The pilot indicated that there were no mechanical malfunctions associated with the airplane during the flight.