A tractor can make a lot more assumptions about its environment than a car can, and things like field topography/row direction can be programmed once and then j

A tractor can make a lot more assumptions about its environment than a car can, and things like field topography/row direction can be programmed once and then just replayed. Automating them should be relatively simple (and it looks like it is being done [0]). I think the necessary algorithmic/sensor complexity is probably closer to a Roomba than a Google car. [0] http://en.wikipedia.org/wiki/Driverless_tractor http://en.wikipedia.org/wiki/Driverless_tractor