Method of spreading granular material

1. A method of spreading granular material by a spreader with first and second rotatingly drivable centrifugal disks arranged side by side, the method comprising the 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 proximate to the field-internal spreading boundary;

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 proximate to the field-internal spreading boundary; and

reducing 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 a second range proximate to the field-internal spreading boundary, the second range adjoining the first range proximate to the field-internal spreading boundary,

wherein a percentage by which 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 second range proximate to the field-internal spreading boundary, is reduced corresponds to a percentage by which the amount of granular material that has been 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 proximate to the field-internal spreading boundary, has been increased.

2. The method according to claim 1 , further comprising the step of:

reducing the 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 second range proximate to the field-internal spreading boundary, the second range adjoining the first range close to proximate to the field-internal spreading boundary,

wherein the amount of granular material applied to the second centrifugal disk, which is part of the spreader and which faces the field-internal spreading boundary, is reduced to zero during traveling through the second range proximate to the field-internal spreading boundary.

3. The method according to claim 1 , wherein the total 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, and to the second centrifugal disk, which is part of the spreader and which faces the field-internal spreading boundary, while traveling through the first range and the second range, corresponds to a usual total amount of granular material for this area.

4. The method according to claim 3 , wherein a further amount of granular material additionally 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 and the second range corresponds to a reduced 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 the first range and the second range.

5. The method according to claim 1 , further comprising the step of:

reducing 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 a third range proximate to the field-internal spreading boundary, the third range adjoining the second range proximate to the field-internal spreading boundary,

wherein 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, is reduced to zero during traveling through the third range proximate to the field-internal spreading boundary.

6. The method according to claim 1 , further comprising the step of:

changing an application point of the 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 third range proximate to the field-internal spreading boundary.

7. The method according to claim 6 , wherein changing the application point of the granular material applied to the first centrifugal disk, which is part of the spreader and which faces away from the field-internal spreading boundary, comprises at least one of the steps of:

changing a relative position or a relative orientation of the first centrifugal disk facing away from the field-internal spreading boundary and of a dosing unit assigned to the first centrifugal disk facing away from the field-internal spreading boundary, or

moving the first centrifugal disk, which faces away from the field-internal spreading boundary, or

moving a dosing unit assigned to the first centrifugal disk, which faces away from the field-internal spreading boundary.

8. The method according to claim 6 , wherein changing the application point of the granular material applied to the first centrifugal disk, which is part of the spreader and which faces away from the field-internal spreading boundary, takes place such that a spreading pattern of the first centrifugal disk facing away from the field-internal spreading boundary is turned away from the spreading boundary.

9. A spreader for spreading granular material, comprising:

first and second rotatingly drivable centrifugal disks arranged side by side,

wherein the spreader is configured to:

detect 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;

reduce 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 proximate to the field-internal spreading boundary;

increase 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 proximate to the field-internal spreading boundary; and

reduce 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 a second range proximate to the field-internal spreading boundary, the second range adjoining the first range proximate to the field-internal spreading boundary,

wherein a percentage by which 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 second range proximate to the field-internal spreading boundary, is reduced corresponds to a percentage by which the amount of granular material that has been 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 proximate to the field-internal spreading boundary, has been increased.

10. A spreading system, comprising:

a spreader for spreading granular material; and

a vehicle pulling or carrying the spreader,

wherein the spreading system is configured to:

detect 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;

reduce 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 proximate to the field-internal spreading boundary;

increase 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 proximate to the field-internal spreading boundary; and

reduce 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 a second range proximate to the field-internal spreading boundary, the second range adjoining the first range proximate to the field-internal spreading boundary,

wherein a percentage by which 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 second range proximate to the field-internal spreading boundary, is reduced corresponds to a percentage by which the amount of granular material that has been 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 proximate to the field-internal spreading boundary, has been increased.

11. The spreading system of claim 10 , wherein the spreader is a fertilizer spreader.

12. The spreading system of claim 10 , wherein the vehicle is a tractor.