In which way Newton-meter is interesting parameter in these. Torque but where? At motor? At wheel? Torque is only interesting at wheel, if you have slow tracto

In which way Newton-meter is interesting parameter in these. Torque but where? At motor? At wheel? Torque is only interesting at wheel, if you have slow tractor dragging heavy objects. Must come from petrol engines, where torque is mentioned, because you need less gear-shifting with higher torque at large variety of motor speed.