Method for preparing an application map, comprising the following steps: providing an application agent carrying a machine-readable identifier, reading of the machine-readable identifier into a computer system by a user, receiving information on the application agent from a database, determining a partial-area-specific need for application agent for a field on which crop plants are cultivated, preparing an application-agent-specific application map for loading into a working memory of a control unit used to control feeding of the application agent from its container in the direction of a spraying device, based on the information on the application agent from the database and the partial-area-specific need, wherein the information on the application agent is used to determine which conditions apply for the application of the application agent and the application-agent-specific application map is prepared from the partial-area-specific need and the conditions, wherein weather information is also taken into consideration for preparing the application map and the information in step of the method according to the invention is one or more types of information from the following list: - dosing information, - maximum usable concentration of the application agent, - minimum usable concentration of the application agent, - maximum usable amount of application agent, - legal and/or official and/or quality assurance limitations on use and/or prohibitions of use for the application agent with respect to the location of the application or the time of the application and/or - interactions of the application agent with other application agents, wherein the weather situation on a planned application day is determined and amount and/or concentration and/or formulation of the application agent and/or the time of the application and/or another application parameter is/are adapted to the prevailing weather, wherein the machine-readable identifier is an individual identifier that is unique to a carrier, wherein the preparation of the application map is linked to the presence of the individual identifier and only after the individual identifier has been read in is it possible to prepare and export the application map, and wherein with the individual identifier it is only possible to prepare and export a single application map. providing an application agent carrying a machine-readable identifier, reading of the machine-readable identifier into a computer system by a user, receiving information on the application agent from a database, determining a partial-area-specific need for application agent for a field on which crop plants are cultivated, preparing an application-agent-specific application map for loading into a working memory of a control unit used to control feeding of the application agent from its container in the direction of a spraying device, based on the information on the application agent from the database and the partial-area-specific need, wherein the information on the application agent is used to determine which conditions apply for the application of the application agent and the application-agent-specific application map is prepared from the partial-area-specific need and the conditions, wherein weather information is also taken into consideration for preparing the application map and the information in step of the method according to the invention is one or more types of information from the following list: - dosing information, - maximum usable concentration of the application agent, - minimum usable concentration of the application agent, - maximum usable amount of application agent, - legal and/or official and/or quality assurance limitations on use and/or prohibitions of use for the application agent with respect to the location of the application or the time of the application and/or - interactions of the application agent with other application agents, - dosing information, - maximum usable concentration of the application agent, - minimum usable concentration of the application agent, - maximum usable amount of application agent, - legal and/or official and/or quality assurance limitations on use and/or prohibitions of use for the application agent with respect to the location of the application or the time of the application and/or - interactions of the application agent with other application agents, wherein the weather situation on a planned application day is determined and amount and/or concentration and/or formulation of the application agent and/or the time of the application and/or another application parameter is/are adapted to the prevailing weather, wherein the machine-readable identifier is an individual identifier that is unique to a carrier, wherein the preparation of the application map is linked to the presence of the individual identifier and only after the individual identifier has been read in is it possible to prepare and export the application map, and wherein with the individual identifier it is only possible to prepare and export a single application map.