THE PILOT ATTEMPTED A LANDING NEXT TO A SHORT DIRT FARM ROAD FOLLOWING AN AGRICULTURAL AERIAL APPLICATION FLIGHT. HIGH DENSITY ALTITUDE CONDITIONS EXISTED IN THE LANDING AREA. THE PILOT LANDED BEYOND THE PROPER TOUCHDOWN POINT WITH EXCESSIVE AIRSPEED AND WAS UNABLE TO STOP THE AIRPLANE IN THE DISTANCE AVAILABLE BEYOND HIS ACTUAL TOUCHDOWN POINT. HE ATTEMPTED A GO-AROUND TOO LATE TO RECOVER FROM THE SITUATION AND OVERRAN THE LANDING SURFACE.