As far as tractors go, the primary function is localization for automatic steering and other function automation (raising an implement on the headlands, for instance), and, especially in older systems, simply being aware of where you have already crossed the field.
Once you attach an implement, then there are all kinds of other functions that it may be used for, like variable rate application. In harvesting applications, there are systems where the combine can take over control of the grain cart tractor while unloading on the go to make sure it stays in the right spot, again localized via GPS. The combine itself will also map the crop yields by its location, and of course automatic steering like the tractors have.
With RTK these tractors can achieve centimetre accuracy and repeatability which opens the door for all kinds of possibilities.
Once you attach an implement, then there are all kinds of other functions that it may be used for, like variable rate application. In harvesting applications, there are systems where the combine can take over control of the grain cart tractor while unloading on the go to make sure it stays in the right spot, again localized via GPS. The combine itself will also map the crop yields by its location, and of course automatic steering like the tractors have.
With RTK these tractors can achieve centimetre accuracy and repeatability which opens the door for all kinds of possibilities.