A method of spreading granular material by a spreader utilizes first and second rotatingly drivable centrifugal disks arranged side by side, and includes steps of: detecting a field-internal spreading boundary, which extends ahead of the spreader in a direction of movement of the spreader and which necessitates an adaptation of distribution characteristics of the spreader during traveling on at least one tramline; reducing an amount of granular material applied to the second centrifugal disk, which is part of the spreader and which faces the field-internal spreading boundary, during traveling through a first range close to the field-internal spreading boundary; and increasing the amount of granular material applied to the first centrifugal disk, which is part of the spreader and which faces away from the field-internal spreading boundary, during traveling through the first range close to the field-internal spreading boundary.