The present invention provides a method for spreading fertilizer on an agricultural field (1) by means of a spreading device mounted on a self-propelled or trailer-mounted implement, wherein location or position data of the vehicle is applied, in particular, by means of a fertilizer Satellite navigation system recorded and transmitted to a preferably designed as on-board computer unit (2), wherein also location or position data at least one body of water (3a, 3b) are stored in the computer unit (2) and wherein upon reaching and falling below a predetermined distance (a , a1, a2) to the body of water (3a, 3b) the operation of the spreader is controlled by the computer unit (2) such that an adaptation and / or reduction and / or termination of the application of fertilizer is performed to the body of water (3a, 3b) not with fertilizer to burden emittel.
