Abstract: Process for taking action on productive lands, in particular for spreading or removing substances or other objects onto or from patches of soil and/or for surveying patches of soil, in particular pertaining to agricultural productive areas, with a telecommunicating locating system, preferably operating with the aid of satellites, and a working vehicle with a data processing device in which, in communication with the locating system, positional data for the working vehicle are ascertained and stored in real time by the positional data of the working vehicle being processed further in the data processing device during the operational action, in real time in each case, to give the path of the working vehicle traversed within the productive land, and the path being continuously indicated visually by means of an output medium.