There is an open source tractor from the open source ecology project. From the videos it seems to be functional, however I guess for most farmers this would be

There is an open source tractor from the open source ecology project. From the videos it seems to be functional, however I guess for most farmers this would be a no go option. https://opensourceecology.dozuki.com/c/LifeTrac https://opensourceecology.dozuki.com/c/LifeTrac