As you begin to master the basics of Farming Simulator 18, it wouldn't be surprising if you'd start using more than one device in any given field. Actually, it's recommended for players to do this after they get the hang of things in order to maximize profits. However, make sure to keep distance between the machines and pay attention to their given speed. This will avoid situations where devices are blocking each other, as well as preventing employees from getting a normal salary due to these work stoppages.