An Iowa-based company is marketing one of agriculture’s first driverless systems for tractors. Smart Ag, an ag technology firm in Ames, has successfully tested the system that allows existing farm equipment to become autonomous. Smart Ag is taking orders and will sell a limited number of the systems in 2018. Smart Ag’s technology was demonstrated at a field day on a farm near Plainfield in northeast Iowa in November. MBS Family Farms hosted the event to help introduce AutoCart, a software program.