It has been shown, that during the investigated period of 2006-2013 in all analyzed regions of Poland: north-west, south-west, north-east and south-east, the majority of purchased tractors was in the power group of: 75-90 and 90-118 kW and, approximately, about half fewer within the groups of power 75-90 and 90-118 kW. However, in the Western Poland, especially in the south-east region, much more new and used tractors with the power 18-75 kW were purchased. Generally, in all regions purchases concerned more of used tractors rather than new ones in the group of power 37-59 kW, on the other hand, much more of new tractors than used ones were purchased in the group of power 59-75 kW. The total power of the implemented tractors for usage was the highest in the south-east region, at the lowest equivalent average power of an individual tractor. It has been shown, that during the years 2006-2013 there was a moderate upward trend of the average equivalent power of tractors, purchased only in the regions of lowest power saturation - i.e. in the south-west and north-east regions.