Read though the following article from NASA.
How NASA and John Deere Helped Tractors Drive Themselves
There has been a lot of talk lately of self-driving cars, but farmers have already been making good use of self-driving tractors for more than a decadeâ€

Funding research programs such as NASA helps to fuel innovation and the development of new technologies. In the case of John Deere and the Jet Propulsion Laboratory, theNASA funding provided resources for the development of GPS receivers for use in self-driving tractors, which allowed for improved cost-efficiency and better yields for farmers. This type of partnership is an example of how government funding and scientific knowledge can help to shape the future.