C-GDAS, a privately registered Cessna A188B agriculture aircraft, departed from Bracken, SK to Swift Current, SK. (CYYN) with only the pilot on board. During the landing roll on Runway 12 at CYYN, directional control was lost, the aircraft swerved to the left and departed the runway surface. The aircraft sustained substantial damage to the right landing gear and propeller. There were no injuries to the pilot. Winds were calm and the runway was bare and dry. A NOTAM was issued for the closure of Runway 12/30 until 2230Z when the aircraft was removed.