Agricultural Engineering

Inventions whose working principle is the cultivation of land and the harvesting and watering of crops: ploughs and cultivators, balers and pickers, and irrigation methods. Belongs here: the plough, the cotton picker, drip irrigation and the Archimedes screw used to lift water to fields. Does not belong here: general machines that were not made for farming, which sit with mechanical engineering, and food processing, which sits with chemical engineering.