Have a look at naio technologies (http://www.naio-technologies.com/en/ http://www.naio-technologies.com/en/). They make agricultural robots for easing farming.

Have a look at naio technologies (http://www.naio-technologies.com/en/ http://www.naio-technologies.com/en/). They make agricultural robots for easing farming. They have a bunch of robot to remove weed