THE PRIVATE PILOT REPORTED THAT HE TOOK OFF WITH BOTH FUEL TANKS SHOWING HALF FULL ON THE GAUGES, BUT HE DID NOT VISUALLY INSPECT THE FUEL TANKS FOR FUEL PRIOR TO THE FLIGHT. DURING THE DESCENT FOR LANDING, THE ENGINE LOST POWER. HE SET UP FOR A FORCED LANDING IN A COTTON FIELD. WHILE TRYING TO ALIGN THE AIRCRAFT WITH THE PLOWED ROWS, IT STALLED ABOUT 10 FEET AGL, AND COLLIDED WITH THE GROUND. AN INSPECTION OF THE AIRCRAFT REVEALED THAT THE RIGHT FUEL TANK WAS EMPTY, THE RIGHT FUEL TANK WAS SELECTED IN THE COCKPIT, AND THE FUEL SUMP WAS EMPTY.