Recorded are all tractor engine load values,
which came into evidence during operational process, idling, turning
at headlands, etc. From such results it is possible to determine
the complexity of works that were performed, i.e. how engine
power was exploited, how torque and rotation frequency changed.
Engine torque is directly proportional to tractor draft, and the
crankshaft revolutions are directly proportional to the tractor motion
speed. Therefore, engine operational characteristics to some
degree represent operation of the whole tractor [13,37–39].
The relationship between draft and fuel consumption is given in
Appendix A