At 1400 Eastern time the airplane was substantially damaged during a forced landing after a total loss of engine power. The private pilot and the passenger reported no injuries. Visual conditions prevailed. While climbing from 7200 feet to 7500 feet, the engine started vibrating and subsequently failed. Although the nearest airport was 10 miles away, the pilot realized he would not make the airport and made a forced landing in a phosphate field. The nose landing gear collided with a small hill during the landing and the airplane nosed over.