The pilot had landed at the strip on a number of previous occasions, but this was the first time in this aircraft type. To give himself more time the pilot made a longer than normal final approach. At about 100 feet above the ground, with the airspeed at about 65 knots, the aircraft began to sink. The pilot applied full power to commence a go-around and as the nose pitched up, the left wing dropped. The pilot did not prevent the nose of the aircraft pitching up, thus aggravating the almost stalled condition of the aircraft. Power was then reduced and the aircraft landed heavily in a wheat paddock along side the strip and slid sideways as it came to rest.