While descending toward the arpt, after 4 parachute jumpers had egressed, the eng loss all power. There was insufficient alt to glide to the arpt, so the plt elected to land in an area with rice paddies. As the acft touched down, it encountered a dike & nosed over, an exam revealed that some fuel was remaining in the fuel tanks. About 1 pint of fuel was drained from the fire wall fuel strainer. No water was found in the fuel sys. Aprx 25 mi south at merced, ca, the temp & dew point were 87 & 50 deg, respective. According to icg probability charts, carb ice would have been possible at glide power; however, icing was not verified.