Tractor

A tractor is an engineering vehicle specifically designed to deliver a high tractive effort (or torque) at slow speeds, for the purposes of hauling a trailer or machinery such as that used in agriculture, mining or construction. Most commonly, the term is used to describe a farm vehicle that provides the power and traction to mechanize agricultural tasks, especially (and originally) tillage, but nowadays a great variety of tasks. Agricultural implements may be towed behind or mounted on the tractor, and the tractor may also provide a source of power if the implement is mechanised.

A tractor pulling a chisel plow in Slovenia
A John Deere 9320 at a construction site in the US
A rubber tracked tractor pulling a disc harrow
Tractors-per-100-square-kilometres-of-arable-land[1]