In 2015, 1,986 new tractors were licensed, a decrease on the 2,186 new tractors compared to the previous year, figures from the Central Statistics Office (CSO) show.
The number of used (imported) tractors licensed also fell to 1,787 compared with the 2,357 imported in 2014.
In December 2015, 60 new tractors were licensed, down from 70 in 2014 and 105 in 2013.
The number of used (imported) tractors for December was also down with 124 licensed in 2015, down from the 142 in 2014 and the 256 in 2013, the figures show.
CSO figures show that for the first six months of the year 1,173 new tractors were licensed in Ireland.
The number of used (imported) tractors as of June 2015 was 880 tractors; this was down on the first six months of 2014, when 1,361 tractors were imported.
In October 2015, AGCO, the manufacturers of Massey Ferguson, Valtra and Fendt reported net sales of approximately $1.7bn (€1.55bn) for the third quarter of 2015.
According to AGCO, the company also experienced variation in the sales market, with sales rising by 3.7% in Europe, Africa and the Middle East (EAME).
But, despite the rise in value physical combine and tractor sales to Western Europe have dropped by 11% and 8% respectively for the first nine months of 2015, it stated.