During a local circuit flight conducted from a private grass airstrip, in the Woolengrange area of Co. Kilkenny, the microlight aircraft experienced engine difficulties when climbing away from the airstrip. The Pilot conducted a forced landing in an agricultural field close to the airstrip. During the landing roll the aircraft impacted with a line of raised ground which traversed the field. The aircraft decelerated suddenly, and slewed around coming to rest on a heading that was approximately reciprocal to its original direction of travel. The aircraft was destroyed in the impact sequence. The Pilot, who was the sole occupant of the microlight, sustained severe injuries as a result of the accident; extricated himself from the wreckage and was assisted by local residents who attended the scene. There was no fire.