Tractor New Holland T 7070

Belt and power takeoffs, incorporated in tractors from the beginning, were standardized first in the rear-mounted, transmission-derived power takeoff and later in the independent, or live-power, takeoff, which permitted operation of implements at a constant speed regardless of the vehicular speed.

Many modern tractors also have a hydraulic power-takeoff system operated by an oil pump, mounted either on the tractor or on a trailer.