DE102021113832A1 - Agricultural fertilizer spreader and method for mixing grit to be spread on an agricultural area - Google Patents

Abstract

The invention relates to an agricultural fertilizer spreader (10) which is set up to distribute granular spreading material in a predetermined quantity per unit area on an agricultural area. In order to create an agricultural fertilizer spreader (10), by means of which an adaptation of a granular spreading material to a wide variety of conditions and legal requirements is made possible, it is provided that it comprises a mixing system (50) which is set up to mix the spreading material, depending on a quantity Unit area and a required and variable mixing ratio with a variable quantity of an additive. The invention also relates to a method for mixing grit to be spread on an agricultural area with an additive.

Description

The invention relates to an agricultural fertilizer spreader which is set up to distribute granular spreading material in a predetermined quantity per unit area on an agricultural area. The invention also relates to a method for mixing grit to be spread on an agricultural area with an additive.

Essentially two different designs of agricultural fertilizer spreaders are known from the prior art for the large-area distribution of granular spreading material, in particular for the distribution of agricultural fertilizer.

A first design is represented by what are known as disc spreaders or centrifugal spreaders, in which the spreading material is distributed by means of a centrifugal mechanism formed by a disc. ^The centrifugal system is ^usually horizontal or slightly inclined with e.g is accelerated and thrown away. The variation of the amount of grit is done by enlarging or reducing the outlet opening of the storage container. The throw pattern created by the rotation of the discs usually corresponds to a sector of a circular ring. Such fertilizer spreaders have a simple structure.

A second design is represented by so-called pneumatic spreaders or precision spreaders. With such spreaders, the spreading material is metered from a storage container by means of metering devices assigned to the storage containers into an air flow and by means of this air flow from the storage tank via a large number of pipes to a corresponding number of distribution rods attached distribution lines promoted. Distribution devices in the form of so-called baffle plates are attached to the distribution lines, against which the spreading material is conveyed by means of the air flow and then distributed over the entire surface by means of spreading fans that are thus generated.

So far, active ingredients (e.g. pure urea) have also been applied as spreading material with such fertilizer spreaders, which are no longer permitted due to new regulations. In order to be able to spread such active ingredients on an agricultural area, there are, for example, grit that is provided with additives. However, such grit is expensive to obtain. A flexible adaptation of the respective spreading material to a wide variety of conditions is also not possible.

The object of the invention is therefore to eliminate the disadvantages of the prior art described. In particular, a fertilizer spreader is to be created by means of which a granular spreading material can be adapted to a wide variety of conditions and legal requirements.

These objects are achieved by an agricultural fertilizer spreader with the features of independent claim 1 and by a method for mixing grit to be spread on an agricultural area with the features of method claim 17. Advantageous embodiments and developments of the invention are in the claims and the following Description disclosed with partial reference to the figures.

According to a first aspect of the invention, there is provided an agricultural fertilizer spreader. The agricultural fertilizer spreader is designed to spread granular spreading material (e.g. agricultural granular fertilizer) in a predetermined amount per unit area (e.g. amount per hectare) on an agricultural area.

According to the invention, the agricultural fertilizer spreader comprises a mixing system which is set up to mix the spreading material with a variable quantity of an additive, depending on a quantity per unit area and a required and variable mixing ratio.

As a result of the measures according to the invention, a pneumatic fertilizer spreader is created in which an additive can be fed or mixed into a granular grit by means of a mixing system, which enables a granular grit to be adapted to a wide variety of conditions and legal requirements in a much more flexible manner than in the prior art.

The quantity per unit area of the spreading material can be specified, for example, manually by an operator and can include, for example, an indication of a quantity (e.g. kg - kilogram) per hectare. An automated definition of the quantity per unit area would also be possible.

The mixing ratio expediently defines a proportion of the additive compared to a quantity of the grit, e.g. 1 liter of additive for 1 ton of grit or e.g. 30 kg of additive for 1 ton of grit or the like.

The additive can be at least (eg one or more different) a liquid alternatively or additionally, however, it can also be at least one granulate and/or one granulate dissolved in a liquid. The additive can, for example, be a so-called urease inhibitor. The additive could also be what is known as slug pellets or an additional fertilizer and/or the like. Also, the additive could be another type of mordant.

Mixing according to the invention includes, for example, complete and/or partial wetting (e.g. with liquid additive) and/or spraying (e.g. with liquid additive) and/or dusting (e.g. with granular additive) of the grit with the additive. Again, wetting and/or spraying and/or dusting according to the definition of the invention can also include moistening, admixing, feeding and/or the like.

The agricultural fertilizer spreader can be designed as a disc spreader (eg centrifugal spreader, centrifugal spreader), in which case the spreading material can be distributed by means of a centrifugal mechanism formed by a disc. The slingshot can be horizontal or slightly inclined rotating disks, for example at 700 ^rpm to 1500 ^rpm , onto which disks the grit falls in a variable amount through an outlet opening of a storage container and is accelerated and thrown away by throwing bars attached to the disks .

The agricultural fertilizer spreader can be designed as a pneumatic fertilizer spreader and, for distributing the spreading material, can be provided with a distribution linkage extending transversely to the direction of travel of the fertilizer spreader, with a plurality of distribution lines extending in different lengths along the distribution linkage with distribution devices arranged thereon, with one operatively connected to the distribution lines , Flow generating device (e.g. one or more fans) is provided on the fertilizer spreader, which is set up to generate an air flow in the distribution lines to promote the spreading material along the distribution lines.

• - einen Vorratsbehälter, zum Bevorraten und Mitführen des Streuguts und/oder
• - einen, einem Vorratsbehälter zugeordneten und mit diesem eine bauliche Einheit bildenden Zwischenbehälter und/oder
• - ein sich zwischen einem Vorratsbehälter und einem Zwischenbehälter erstreckendes Fördersystem (z.B. Förderschnecke) und/oder
• - mehreren sich entlang eines Verteilgestänge in unterschiedlichen Längen erstreckende und Verteilvorrichtungen (z.B. Prallteller) aufweisende, Verteilleitungen (z.B. Rohr- und/oder Schlauchleitungen).

According to a preferred embodiment of the agricultural fertilizer spreader, it is possible that the agricultural fertilizer spreader is equipped with at least one of the following and/or the mixing system is operatively coupled (e.g. connected or opening out) to at least one of the following,

• - a storage container for storing and carrying the grit and/or
• - an intermediate container assigned to a storage container and forming a structural unit with it and/or
• - A conveyor system extending between a storage container and an intermediate container (eg screw conveyor) and/or
• - Several distribution lines (eg pipes and/or hose lines) extending along a distribution linkage in different lengths and having distribution devices (eg baffle plates).

Alternatively or in addition, it is possible for the storage container and/or the intermediate container to be assigned a filling level monitoring device which is set up to determine the filling level of the grit in the storage container and/or in the intermediate container, with the mixing system being set up to measure a quantity of additive in To change as a function of a fill level, preferably to increase as a function of a changing fill level, to reduce and/or to keep it constant. This can also be done taking into account the mixing ratio of the additive to the grit.

In order to achieve the desired mixing of the entire granular spreading material that is as uniform as possible, it is possible according to a development of the invention for the agricultural fertilizer spreader to have a mixing device which is set up to mix the spreading material with the additive by means of a rotary movement of the mixing device. The mixing device can be formed by at least one rotating screw conveyor and/or agitator shaft, preferably assigned to a storage container and/or an intermediate container. Alternatively or additionally, the mixing device can also be operatively coupled to the mixing system or can be comprised by it.

The mixing system can have at least one additional container attached to the fertilizer spreader, which is designed to carry and provide the additive. The additional container can also be formed by a canister, a barrel and/or the like, and the agricultural fertilizer spreader can thus expediently have one or more receptacles, holders or the like for a canister, a barrel and/or the like.

In an alternative or supplementary embodiment, it is provided that the mixing system has a line system that is operatively connected to the additional container, the line system being coupled to a conveying device, which conveying device is set up to to convey the additive along the line system with a delivery pressure (e.g. pneumatically or hydraulically) to at least one spray device assigned to the line system, with the spray device being set up to mix the grit with the additive by moistening and/or spraying and/or dusting the Carry out spreading material with the additive.

According to an alternative or supplementary embodiment variant, it is provided that the mixing system has an additional container for carrying and providing the additive and/or a line system for conveying the additive, with the additional container and/or the line system being assigned a detection device which is set up to To detect amount of additives in the additional container and / or to detect a funded amount of additives in the line system.

An alternative or supplementary embodiment variant can also provide that the mixing system has an additional container for carrying and providing the additive and/or a line system for conveying the additive, with the additional container and/or the line system being assigned a valve unit which is set up to deliver a quantity to change additives as a function of a quantity per unit area of the grit and a required and variable mixing ratio and/or to change it based on a quantity of additives detected by the detection device.

The mixing system and the additional container can expediently form a closed (e.g. at least largely airtight) line system which is designed in such a way that the additive can only escape through the spray devices, which means that contamination of the environment with the additive can be reduced or completely prevented. In this case, the reservoir and the additional container can also be designed to be correspondingly closed.

The mixing ratio can be changed manually and/or automatically by means of a control device that is and/or can be signal-connected to the mixing system is kept largely constant. It can thus be possible to increase, reduce and/or to keep largely constant the amount of additive depending on a filling level in the storage container and/or in the intermediate container. This can also be done taking into account the mixing ratio of the additive to the grit.

• - Anhand von Bedienervorgaben und/oder
• - Anhand von in einer Datenbank hinterlegten, Eigenschaften des Zusatzmittel und/oder des Streuguts definierenden Daten (z.B. Vorgabe einer anteiligen Menge des Zusatzmittel zur Menge des Streuguts) und/oder
• - Anhand von mittels einer Wetterdatenbank erfasster aktueller oder zu erwartender Wetterdaten und/oder
• - Anhand von morphologischen Eigenschaften eines Pflanzenbestand der landwirtschaftlichen Fläche und/oder
• - Anhand einer Art und einer Vegetationsphase eines Pflanzenbestand der landwirtschaftlichen Fläche und/oder
• - Anhand von Bodenbedingungen der landwirtschaftlichen Fläche.

A preferred development of the invention can provide that the control device is set up to manually and/or automatically change a quantity of additive depending on at least one of the following by means of the mixing system,

• - Based on operator defaults and/or
• - On the basis of data stored in a database and defining properties of the additive and/or the grit (eg specification of a proportional amount of the additive to the amount of grit) and/or
• - On the basis of current or expected weather data recorded by means of a weather database and/or
• - Based on morphological characteristics of a plant stand of the agricultural area and/or
• - On the basis of a type and a vegetation phase of a plant stand of the agricultural area and/or
• - Based on soil conditions of the agricultural area.

The control device can be signal-connected and/or signal-connectable to a detection device (e.g. camera, radar sensor), the detection device being set up to detect a crop population on the agricultural area and the control device being set up to change a mixing ratio on the basis of detected plant properties , preferably to be changed in such a way that a quantity of the additive is proportionally increased, reduced and/or kept largely constant. This makes it possible for a mixing ratio to be precisely adapted to the respective plant properties and thus the amount of spreading material and/or the additive can be significantly reduced.

In order to achieve the greatest possible flexibility, the agricultural fertilizer spreader can provide that the mixing system is set up to mix the spreading material with the additive, independently of an activated or deactivated distribution of granular spreading material. The mixing device, for example, can also be activated, preferably permanently, independently of an activated or deactivated distribution of the grit.

To ensure sufficient mixing of the spreading material with the additive, it is possible for the agricultural fertilizer spreader to have a signal connected to the mixing system and/or has a signal-connectable control device, wherein the control device is set up to activate or deactivate a distribution of granular spreading material by means of the agricultural fertilizer spreader, depending on a mixing of the spreading material with the additive carried out by means of the mixing system, preferably depending on a defined and/or to activate or deactivate the mixing of the spreading material with the additive for a definable period. A sufficient time for the mixing of the grit with the additive can thus be ensured, since a distribution can only be activated after a sufficient duration of the mixing.

To avoid repetition, it should be pointed out that the embodiments and features according to the invention can be freely combined with the agricultural fertilizer spreader and/or the method in any way. Accordingly, all embodiments and features according to the invention are disclosed and claimable both for the agricultural fertilizer spreader and for the method.

According to a further aspect of the invention, a method for mixing grit to be spread on an agricultural area with an additive is provided. The method is preferably carried out with an agricultural fertilizer spreader as described in this document, preferably carried out with an agricultural fertilizer spreader according to at least one of claims 1 to 16.

The method is characterized by mixing granular grit with a variable amount of an additive by means of a mixing system assigned to the agricultural fertilizer spreader, depending on a quantity per unit area of the grit and a required and variable mixing ratio of the grit to the additive.

The control device has, e.g /or control circuit is expediently designed for hydraulic and/or pneumatic and/or electrical signal and/or command transmission. Which signal and/or command transmission can also take place wirelessly (e.g. via WLAN).

In the context of the invention, the concept of the control device includes, in particular, the entirety of the components for signal and/or command transmission. Accordingly, computer units, CPUs and/or the like are also included. Control devices integrated in the sensors, detection devices, filling level monitoring devices or detection devices are also included. It should also be pointed out that the signals and/or data from the acquisition devices/detection devices/level monitoring devices/sensors and/or the like can each be used as feedback for a control and/or regulation variable.

It should also be pointed out that the terms "control" and "control device" can refer to electronic and/or pneumatic and/or hydraulic controls or regulations which, depending on the training, can take on control tasks and/or regulation tasks. Even if the term “control” is used here, it can also appropriately include “rules”.

• 1 eine Perspektivansicht eines, als pneumatischer Düngerstreuer ausgeführten, landwirtschaftlichen Düngerstreuer,
• 2A eine Perspektivansicht eines Mittelteils eines Verteilgestänge des landwirtschaftlichen Düngerstreuer gemäß der 1,
• 2B eine Draufsicht eines am Mittelteil eines Verteilgestänge angeordneten Dosiersystem für Streugut eines landwirtschaftlichen Düngerstreuer gemäß der 2A mit einem diesem zugeordnetem Mischsystem,
• 3 eine schematische Prinzipskizze einer Ausführungsvariante eines Mischsystem.

Further details and advantages of the invention are described below with reference to the accompanying drawings. The proportions of the individual elements to one another in the figures do not always correspond to the real proportions, since some forms are shown in simplified form and other forms are shown enlarged in relation to other elements for better illustration. Show it:

• 1 a perspective view of an agricultural fertilizer spreader designed as a pneumatic fertilizer spreader,
• 2A a perspective view of a middle part of a distribution linkage of the agricultural fertilizer spreader according to FIG 1 ,
• 2 B a top view of a metering system arranged on the central part of a distribution linkage for spreading material of an agricultural fertilizer spreader according to FIG 2A with a mixing system assigned to it,
• 3 a schematic outline sketch of an embodiment variant of a mixing system.

The in the 1 until 3 The embodiments shown correspond at least in part, so that similar or identical parts are provided with the same reference numbers and, for their explanation, reference is also made to the description of the other embodiments or figures in order to avoid repetition. The illustrated embodiments only represent examples of how the agricultural fertilizer spreader according to the invention and the method according to the invention can be designed and implemented and do not represent any final limitation.

A variant embodiment of an agricultural fertilizer spreader 10 pulled by means of an agricultural towing vehicle (not shown here) is shown in the perspective view in FIG 1 out. It should be noted, however, that the agricultural fertilizer spreader 10 according to the invention could also be embodied as a self-propelled agricultural fertilizer spreader 10 or as an agricultural fertilizer spreader 10 mounted on a tractor (eg by means of a connection device in the form of a three-point linkage). The agricultural fertilizer spreader 10 could also be an autonomous vehicle, or be part of an autonomous vehicle.

The agricultural fertilizer spreader 10 is expediently set up to distribute granular spreading material (e.g. agricultural, granular fertilizer) in a predetermined (e.g. manually and/or automatically defined and/or definable) amount per unit area on an agricultural area. The agricultural fertilizer spreader 10 is preferably set up to carry out a method as described in this document, preferably to carry out a method according to at least one of claims 1 to 16.

The agricultural fertilizer control 10 includes a mixing system 50, which is, for example, executed as in FIG 3 shown. The agricultural fertilizer controller 10 includes a framework 12 for supporting assemblies thereof. At the front end of the frame structure 12 is a connecting device 14 (e.g. according to 1 a towing eye) is provided, which connecting device 14 is designed in such a way that the agricultural fertilizer controller 10 can be connected to an agricultural towing vehicle (not shown here). To move the agricultural fertilizer spreader 10 over an agricultural area (eg arable land), this also includes a chassis 16, which chassis 16 comprises two axles, each with two wheels 18. A chassis 16 with only one axle or with tape drives or caterpillar drives would also be conceivable.

A reservoir 20 is attached to the frame structure 12 to carry and provide the grit, wherein the reservoir 20 can have one or more chambers for receiving the respective grit depending on the number of different grit to be distributed. For example, it would also be conceivable that a mixing system 50 could be assigned to each chamber or at least spray devices 52 of a mixing system 50 could be assigned.

The agricultural fertilizer spreader 10 is designed as a pneumatic fertilizer spreader and has a distribution linkage 22 extending transversely to the direction of travel FR of the fertilizer spreader to distribute the spreading material. The distribution linkage 22 has a multiple width of the frame construction 12 . The distribution linkage 22 is expediently mounted in a height-adjustable manner on the frame construction 12 and is composed of a central part 24 and side parts 26 mounted on the left and right of this by means of pivot axes, so that the side parts 26 can be pivoted relative to the central part 24, e.g. by the width of the to reduce agricultural fertilizer spreader 10 for a transport trip. Along the distribution linkage 22, ie along the central part 24 and the side parts 26, extend in different lengths distribution lines 28 with attached distribution devices 30 for distribution of the grit.

It should be noted that to clarify the distribution devices 30 in FIG 1 the distribution lines 28 on the outside do not reach as far as the outermost distribution devices 30 in each case. The distribution devices 30 are embodied as impact elements known from the prior art, but could also be embodied in other ways.

In order to convey the spreading material along the distribution lines 28, a flow-generating device (e.g. one or more blowers, not shown here) can also be attached to the agricultural fertilizer spreader 10, in particular to the distribution linkage 22, which flow-generating device is thus set up to generate an air flow in the distribution lines 28 Promoting the grit along the distribution lines 28 to generate.

2A shows a perspective view of an embodiment variant of a central part 24 of a distributor linkage 22 of the agricultural fertilizer spreader 10 according to FIG 1 . the 2 B also shows a plan view of a dosing system 32 arranged on the central part 24 of the distribution linkage 22.

A dosing system 32 with a large number of dosing devices 34 and an intermediate container 36 is assigned to the central part 24 . The dosing system 32 and the central part 24 or the distribution linkage 22 thus form a structural unit.

A conveyor system 38 (e.g. screw conveyor) which is expediently operatively connected to the storage container (see FIG 1 ). The intermediate container 36 tapers downwards in the shape of a funnel, with outlet openings being arranged at the lowest point in each case. The grit is passed on through the outlet openings from the intermediate container 36 to the plurality of metering devices 34 (eg screw metering devices, star feeders and/or the like), each of which is motor-driven and metered into the distribution lines 28 by means of this. A distribution of spreading material can be activated or deactivated by activating or deactivating the dosing devices 34 , for example it can also be activated or deactivated by means of individual distribution devices 30 .

According to the 2 B For example, the mixing system 50 is operatively coupled to the intermediate container 36, but it would also be conceivable for the mixing system 50 to be equipped with a storage container 22 for storing and carrying along the grit and/or with a conveyor system 38 extending between a storage container 22 and the intermediate container 36 and/or or is operatively coupled to distribution lines 28 .

The intermediate container 36 is assigned a mixing device 40 which is set up to carry out or improve mixing of the grit with the additive by mixing the grit with the additive. The mixing device 40 is in this case formed, for example, by a rotating screw conveyor. Alternatively or in addition, the mixing device 40 could also be associated with the storage container and/or be formed by an agitator shaft. The rotating drive of the mixing device takes place, for example, by means of a motor drive (e.g. hydraulic motor, electric motor or the like).

A functional connection of the mixing system 50 to the intermediate container can expediently mean in particular that in these, for example, spray devices 52, which are set up to mix the grit with the additive by moistening and/or spraying and/or dusting the grit with the additive perform, open or are arranged in this.

From the principle sketch of 3 shows an embodiment variant of a mixing system 50 according to the invention. The mixing system 50 is expediently attached to an agricultural fertilizer spreader 10, which is set up to distribute granular spreading material in a predetermined quantity, even area unit, on an agricultural area (eg arable land). The mixing system 50 is set up to mix (eg spray, wet and/or the like) the grit with a variable amount of a preferably liquid additive, depending on a quantity per unit area and a required and variable mixing ratio. The mixing system 50 is also operationally assigned to a storage container 20 and/or an intermediate container 36 . The grit in the storage container 20 and/or intermediate container 36 is represented schematically by a curved line.

The mixing ratio can be, for example, 1 liter to 3 liters of additive per ton of grit and/or 1 kg to 3 kg of additive per ton of grit.

The mixing system 50 includes an additional container 54 which is designed to carry and provide the additive. In addition, the mixing system comprises a line system 56 (e.g. formed by pipes, hoses and/or the like) that is operatively connected to the additional container 54 . A delivery device 58 (e.g. a liquid pump) is assigned to the line system, which delivery device 58 is set up to deliver the additive along the line system 56 with a delivery pressure in the direction of spray devices 52 assigned to the line system 56 . The spray devices 52 are expediently set up to mix the grit with the additive by moistening and/or spraying and/or dusting the grit with the additive. The spray devices 52 can be formed, for example, by spray nozzles, impact elements or the like.

The mixing system 50 also includes a detection device 60 (e.g. flow sensor, filling level sensor) which is set up to detect a quantity of additive in the additional container and/or to detect a quantity of additive conveyed in the line system 56 .

A valve unit 62 is also assigned to the line system 56, which is set up to change an amount of additive depending on the amount per unit area of the spreading material and a required changeable mixing ratio and/or based on an amount of additive detected by the detection device (60). to change.

It would also be possible for a filling level monitoring device (e.g. filling level sensor, float sensor) to be assigned to storage container 20 and/or intermediate container 36, which is set up to determine the filling level of the spreading material in storage container 20 and/or in intermediate container 36, and for mixing system 50 is set up to change a quantity of additive as a function of a fill level, preferably to increase, decrease and/or keep constant as a function of a changing fill level.

The mixing system 50 is signal-connected and/or signal-connectable to a control device 64 (according to 3 represented by broken lines). The mixing ratio can be changed manually and/or automatically using the control device 64, the control device 64 being appropriately set up to add a quantity medium to change in such a way that a quantity of the additive is proportionally increased, reduced and/or kept largely constant. This means that, for example, when the distribution of grit is activated and the filling level in the intermediate container 36 remains constant, the quantity of additive supplied also remains constant, whereas with a decreasing filling level the quantity of additive is also correspondingly reduced.

In particular, it is possible by means of the control device 64 to change a quantity of additive manually and/or automatically by means of the mixing system 50, in particular on the basis of operator specifications.

Although the invention has been described with reference to specific embodiments, it will be apparent to those skilled in the art that various changes may be made and equivalents substituted without departing from the scope of the invention. In addition, many modifications can be made without leaving the associated area. Accordingly, the invention should not be limited to the disclosed embodiments, but should include all embodiments falling within the scope of the appended claims. In particular, the invention also claims protection for the subject matter and the features of the subclaims independently of the claims referred to.

Reference List

10

agricultural fertilizer spreader

12

frame construction

14

connecting device

16

landing gear

18

wheel

20

reservoir

22

distribution linkage

24

center part

26

side part

28

distribution line

30

distribution device

32

dosing system

34

dosing device

36

intermediate container

38

conveyor system

40

mixing device

50

mixed system

52

spray device

54

additional container

56

piping system

58

conveyor

60

detection device

62

valve unit

64

control device

FR

driving direction

Claims (17)

Agricultural fertilizer spreader (10), which is set up to distribute granular grit in a predetermined amount per unit area on an agricultural area, characterized in that it comprises a mixing system (50) which is set up to spread the grit, depending on a quantity per Unit area and a required and variable mixing ratio to be mixed with a variable amount of an additive. Agricultural fertilizer spreader (10) after claim 1 , characterized in that - the additive is at least one liquid and/or granules and/or granules dissolved in a liquid and/or - mixing means complete and/or partial wetting and/or spraying and/or dusting of the grit included with the additive. Agricultural fertilizer spreader (10) according to at least one of the preceding claims, characterized in that it is designed as a pneumatic fertilizer spreader (10) and, for distribution of the spreading material, a distribution linkage (22) extending transversely to the direction of travel (FR) of the fertilizer spreader (10) with a A plurality of distribution lines (28) extending in different lengths along the distribution linkage (22) with distribution devices (30) arranged thereon is provided, with a flow generating device being operatively connected to the distribution lines (28) being provided on the fertilizer spreader (10) which is set up to generate an air flow in the distribution lines (28) to promote the spreading material along the distribution lines (28). Agricultural fertilizer control (10) according to at least one of the preceding claims, characterized in that the agricultural fertilizer spreader (10) is equipped with at least one of the following and/or the mixing system (50) is functionally coupled with at least one of the following, - a storage container (20) for storing and transporting the spreading material and/or - an intermediate container (36) assigned to a distribution linkage (22) and forming a structural unit with it and/or - an intermediate container (36) located between a storage container (20) and a conveyor system (38) extending between intermediate containers (36) and/or - a plurality of distribution lines (28) extending in different lengths along a distribution linkage (22) and having distribution devices (30). Agricultural fertilizer spreader (10) after claim 4 , characterized in that the storage container (20) and/or the intermediate container (36) is assigned a filling level monitoring device which is set up to determine the filling level of the spreading material in the storage container (20) and/or in the intermediate container (36), the mixing system (50) is set up to change a quantity of additive as a function of a fill level, preferably to increase, decrease and/or keep constant as a function of a changing fill level. Agricultural fertilizer spreader (10) according to at least one of the preceding claims, characterized in that it has a mixing device (40) which is set up to mix the spreading material with the additive by rotating the mixing device (40). Agricultural fertilizer spreader (10) after claim 6 , characterized in that the mixing device (40) is formed by at least one rotating screw conveyor and/or agitator shaft, preferably assigned to a storage container (20) and/or an intermediate container (36). Agricultural fertilizer spreader (10) according to at least one of the preceding claims, characterized in that the mixing system (50) has at least one additional container (54) attached to the fertilizer spreader (10) which is designed to carry and provide the additive. Agricultural fertilizer spreader (10) after claim 8 , characterized in that the mixing system (50) has a line system (56) which is operatively connected to the additional container (54), the line system (56) being coupled to a conveying device (58), which conveying device (58) is set up to to convey the additive along the line system (56) at a delivery pressure to at least one spray device (52) assigned to the line system (56), the spray device (52) being set up to mix the grit with the additive by moistening and/or Spraying and/or dusting of the spreading material with the additive. Agricultural fertilizer spreader (10) according to one of the preceding claims, in particular according to claim 8 , characterized in that the mixing system (50) has an additional container (54) for carrying and providing the additive and/or a line system (56) for conveying the additive, the additional container (54) and/or the line system (56) having a Is assigned detection device (60), which is set up to detect a quantity of additive in the additional container (54) and / or in the line system (56) funded quantity of additive to detect. Agricultural fertilizer spreader (10) according to one of the preceding claims, in particular according to claim 8 and/or 9, characterized in that the mixing system (50) has an additional container (54) for carrying along and providing the additive and/or a line system (56) for conveying the additive, the additional container (54) and/or the line system (56) a valve unit (62) is assigned, which is set up to change a quantity of additive - depending on a quantity per unit area of the spreading material and a required and changeable mixing ratio and/or - based on a by means of the detection device (60) to change the detected amount of additives. Agricultural fertilizer spreader (10) according to at least one of the preceding claims, characterized in that a mixing ratio can be changed manually and/or automatically by means of a control device (64) which is and/or can be signal-connected to the mixing system (50), the control device (64) being is set up to change a quantity of additive in such a way that a concentration of the additive is proportionally increased, reduced and/or kept largely constant. Agricultural fertilizer spreader (10) after claim 12 , characterized in that the control device (64) is set up to change a quantity of additives manually and/or automatically by means of the mixing system (50) depending on at least one of the following, - based on operator specifications and/or - based on in a Database stored properties of the additive and / or the grit defining data and / or - Based on current or expected weather data recorded by means of a weather database and/or - Based on morphological properties of a plant stand on the agricultural area and/or - Based on a species and a vegetation phase of a plant stand on the agricultural area and/or - Based on soil conditions on the agricultural area . Agricultural fertilizer spreader (10) according to at least one of the preceding claims, in particular according to claim 12 , characterized in that the control device (64) is signal-connected and/or can be signal-connected to a detection device, the detection device being set up to detect a stand of plants on the agricultural area and the control device (64) being set up to use detected plant characteristics to change a mixing ratio, preferably to change it in such a way that a quantity of the additive is proportionally increased, reduced and/or kept largely constant. Agricultural fertilizer controller (10) according to at least one of the preceding claims, characterized in that the mixing system (50) is set up to mix the grit with the additive independently of an activated or deactivated distribution of granular grit by means of the fertilizer spreader (10). Agricultural fertilizer controller (10) according to at least one of the preceding claims, characterized in that it has a signal-connected and/or signal-connectable control device (64) to the mixing system (50), wherein the control device (64) is set up to, depending on a Mixing system (50) carried out mixing of the grit with the additive to activate or deactivate a distribution of granular grit by means of the agricultural fertilizer spreader (10), preferably to activate or to depending on a defined and / or definable duration of mixing the grit with the additive deactivate. Method, preferably carried out with an agricultural fertilizer spreader (10) according to at least one of Claims 1 until 16 , for mixing grit to be spread on an agricultural area with an additive, characterized by , mixing granular grit with a variable amount of an additive by means of a mixing system (50) assigned to the agricultural fertilizer spreader (10) depending on a quantity per unit area of the grit as well as a necessary and changeable mixing ratio of the grit to the additive.

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