drawbar power

Definition

Agriculture

  • noun the power available to pull an implement, as opposed to the brake horsepower of a tractor. Under field conditions, not all brake horsepower will be available to pull implements, because some of it is needed to make the tractor itself move forwards and overcome the resistance of the bearings and the soil on the wheels.
http://www.dictionarycentral.com/definition/drawbar-power.html