GARRETSON, S.D. (MITCHELLNOW) One man is dead, and another seriously hurt after a farm accident involving a tractor. The Minnehaha County Sheriff’s Office says it happened Tuesday afternoon near Garretson.  Authorities responded to the area where a tractor ran over the two men. One was pronounced dead at the scene. The second victim was taken to a hospital with significant injuries. Officials say the cause of the incident is still being investigated.