On August 7, 1995, approximately 0820 hours mountain daylight time, a Cessna T210K, N8273M, sustained substantial damage when it nosed over during a forced landing in a corn field following a total loss of power while in cruise near Bliss, Idaho. The commercial pilot and passenger were uninjured. The flight, which was for aerial observation, was to have been operated under 14CFR91, and originated from Boise, Idaho, approximately 0700 hours. Visual meteorological conditions prevailed and no flight plan had been filed. The pilot reported in a telephone interview that the aircraft departed Boise with the left fuel tank topped (44.3 gallons) and with 25 gallons in the right fuel tank. She stated that after about 1.3 hours of flight on the right fuel tank, and while the aircraft was operating about 700 feet AGL while conducting a slug habitat survey, the engine abruptly ceased operating and she was unable to achieve a restart in the minimal altitude available after selecting the left fuel tank. She then selected an agricultural (corn) field as her only suitable landing site and executed an intentional forced landing. During the landing roll through the corn the aircraft's nose wheel crossed a deep rut in the terrain and separated. The aircraft nosed over immediately thereafter. On site examination by an FAA inspector revealed that the left fuel tank was nearly full whereas the right tank was nearly empty and that the fuel selector was positioned to select the left tank (refer to attached statement). A post crash engine run was accomplished with no discrepancies noted on August 31, 1995 (refer to attached statement).