From Penn State University Extension
Tractors are the primary source of work-related injuries on farms; nationally, nearly one-third of all farm work fatalities are tractor related. In recent years, June and July have been the months when most tractor accidents have happened.
Accidents that involve tractors account for a large percentage of total farm accident fatalities. However, not all of the injuries happen while the tractor is being used for work. Injuries occur for a variety of reasons and in a number of different ways.
Hazards can be grouped into four categories: