The invention relates to a method for filling a reservoir container of an agricultural spreading machine, in particular a field sprayer having a display and/or an on-board computer having another display device, wherein, in the memory of the on-board computer, one or more filling programs for filling the reservoir container with a carrier fluid and with active ingredients for various plant protection uses are stored, wherein, when a certain plant protection measure to be carried out is called up, an output device of the on-board computer issues a plan of operation with instructions for the operator on the display and/or in another suitable manner for the operator, wherein, in accordance with the plan, the reservoir container of the distribution machine is filled with a carrier fluid and with the active ingredient intended for the given application, in the intended manner and with the intended quantity, wherein the user is guided by means of the on-board computer through the filling process by means of the app
