Furthermore, the development of sub-soilers to break up soil pans (highly compacted layers of soil interfering with water movement and deep crop root development) would not have been possible without the power capability of the modern tractor. Likewise, the ability to improve soil drainage (in excessively high moisture soils) through tractorized mole drainage systems would not have been possible with animal power alone.
Typically, harvesting represents the final stage of crop production at field level and essentially brings the farming season to a close. In many cases, harvesting is the most labor intensive farm operation and not infrequently associated with the drudgery of rural life. The development of machines that could successfully harvest most if not all agricultural crops has been greeted with enthusiasm. And yet challenges remain.