Fuente: Wipo "precision farming" An agricultural implement for applying an active ingredient to a geographic area includes a chassis, and at least one active ingredient tank. Each active ingredient tank is removably positioned on and carried by the chassis. Each active ingredient tank contains an active ingredient therein which is to be applied to the geographic area. Each active ingredient tank has an identification (ID) tag representing data associated with the active ingredient. An electrical reader carried by the chassis is configured for reading the ID tag and providing an output signal. An electrical processing circuit is coupled with the reader and receives the output signal.