At 13:07 mountain time, a Beech V35B lost power and landed in a field five miles east of Falcon Field. The two occupants reported minor injuries. The pilot said he had departed Marana, Ariz., about a hour earlier and, while in cruise flight using the left fuel tank, the engine lost power. He was unable to restart the engine and landed gear up in a field. Investigation revealed the left fuel tank contained about 1 quart of fuel and the right tank appeared to be approximately half full.