Manure applicator device

Abstract: A device for applying manure into agricultural land, comprising a frame member having at least one trench cutting means for cutting a trench in the agricultural land adapted for reveiving the liquid manure, and at least one manure supplying means for introdrucing manure into the trench formed by the trench cutting means behind, as seen in operational direction, further comprising means (8) arranged in front of the manure supplying means for compacting the soil material forming the lower section (23) of the boundaries of the trench (22), so that, in comparison with the soil material, forming the higher sections (24) of the trench boundaries, is less permeable. Preferably, the means for compacting the soil material are formed by the respective trench cutting means (8) which is formed like a disc (8) having a cutting edge (9, 10) and being arranged on the frame so as to rotate freely about a substantially horizontal axis being perpendicular to the trench to be made, wherein the manure applicator device further comprises means (4, 29, 33, 19, 31) for holding the cutting edge of the disc (8) at a distance beneath the ground level of the agricultural land.

Description: The invention relates to a method for applying liquid manure into farming land or grass land comprising: cutting furrows into the ground and supplying liquid manure into the furrows. Such a method is disclosed in US-A-2,912,914. The liquid fertilizer applicator shown in this publication comprises disc-type rotatable colters of substantial thickness at the center and tapering to a thin edge at the circumference, said colters cutting V-shaped furrows in the grounds. The fertilizer is delivered through nozzles directly into the furrows. The ground is pushed aside along the entire height of the furrows but as the width of the furrows decreases in downward direction, the ground bounding the higher parts of the furrows is more compacted than the ground bounding the bottom of the furrows. The fertilizer will follow the part of the least resistance and will substantially drain off through to lower part of the furrows. As a consequence the soil between two furrows will not be sufficiently fed with fertilizer and the fertilizer is unequally distributed. Further the ground water is contaminated. The object of the invention is to avoid this draw back and therefore the method mentioned in the preamble is characterized in that before the manure is supplied in the furrows, the soil bounding the walls of the bottom part of the furrows is compacted so that it is less permeable for the manure than the soil bounding the walls of the furrow part extending above said bottom part. Manure supplied into the furrows having compacted bottom part walls, will easily flow sideways, whereas manure in the bottom part of the furrows will not easily flow vertically downwards in the ground. The root zone of the vegetation, in particular grass, will be able to take in manure effectively. The distance between two adjacent furrows may be larger than was possible up to now. The invention also relates to an apparatus for applying liquid manure into farming land or grass land in accordance with the above-mentioned method, comprising a frame member to which at least one cutting disc is rotatably mounted about a substantially horizontal axis, said cutting disc being bounded by two substantially vertical spaced surfaces and two sloping surfaces which merge into a cutting edge, a nozzle which - as seen in the moving direction of the apparatus - is arranged behind the disc to supply liquid manure into the furrow cut by the cutting disc, and means to hold the lower part of the disc between ground level. From the above-mentioned US-A-2,912,914 such an apparatus is known. To get the ground bounding the bottom part of the furrows compacted considerably and the ground bounding the vertical walls of the furrows not or hardly compacted, the apparatus is characterized in that said means to hold the lower part of the cutting disc beneath ground level maintains not only a part of the sloping surfaces of the disc but also a part of the vertical surfaces of the disc beneath ground level so that the furrow cut by the disc has two vertical walls and a V-shaped bottom, and that the angle a between each of the sloping surfaces of the cutting disc and the vertical plane running through the cutting edge amounts 110-160° so that the soil bounding the walls of the V-shaped furrow bottom being compacted so that it is less permeable for the liquid manure than the soil bounding the walls of the vertical surfaces of the furrow. The invention will be further elucidated on the basis of the following description, provided merely by way of example, of the embodiment of the manure applicator device according to the invention shown in the enclosed drawings. In the drawings: figure 1 shows the manure applicator device according to the invention having a disc-shaped cutting means; figure 2 is a sideview of a part of the cutting means of figure 1; and figure 3 shows the cross section of a trench cut by the cutting means of figures 1 and 2. The manure applicator device comprising frame 1 and shown in figure 1 is adapted to be fastened by fastening plate 6 and pin 7 to a manure tank trailer, not shown, driven by a tractor. A beam 3 extending perpendicular to the operational direction is indirectly secured to the fastening plate 6. At the rear of the beam 3 a vertical hinge joint 5 is provided, to which frame member 2 is attached, so that the frame member 2 can rotate freely in the horizontal plane with respect to the beam 3. On beam 3 more, e.g. 15 frame members 2 may be arranged in transverse direction. The frame member 2 comprises an L-shaped support member 18, the vertical leg of which being connected with an upright bar 26 by means of a connecting parallellogram 4, said bar forming a part of a cutting disc suspension member 34 for cutting disc 8. The connecting parallellogram 4 is connected with fastening plates 36 attached to the support member 18 and the bar 26 through hinge joints 35. The horizontal leg of the L-shaped support 18 is connected with a horizontal member of a U-shaped structure 27 by means of lift cylinder 19, said U-shaped structure forming a part of the cutting disc suspension member 34. The lift cylinder 19 is operable through pneumatic line 31 which is connected with suitable controlling means on the tractor. Naturally, the lift cylinder 19 can be alternatively controlled, viz. hydraulically. By controlling the lift cylinder 19 the height of the cutting disc suspension member 34 with respect to support member 18 and therewith with respect to the beam 3 can be adjusted, whereby the force with which the disc is pressed into the soil can be affected as well as the depth of the trench to be made with the cutting disc 8. The cylinder 19 present for each frame member 2 preloads the suspension member 34 downwardly and therewith also functions as it were as spring suspension for the disc 8, so that when the cutting disc 8 encounters a hole or bump, the respective cutting disc can move temporarily up or down in generally independent from the other cutting discs. The U-shaped structure 27 of the cutting disc suspension member 34 is invertedly arranged, a bar 29 protruding from the bottom side of a leg thereof, to which bar a sliding shoe 30 is connected. The position of the shoe 30 with respect to the U-shaped structure 27 is assured by clamping screw 33. By simply turning the clamping screw 33 lose the shoe 30 can be brought upwardly or downwardly with respect to the U-shaped structure 27 and consequently with respect to the rest of the frame member 2. Consequently, the shoe 30 functions as trench and cutting depth limiter, e.g. for the case the soil to be treated is locally relatively soft. On the cutting disc suspension member 34 also a fork structure is provided, the lower ends of the fork 28 being connected to one another by means of a transverse pin 32 forming the bearing for the cutting disc 8. The cutting disc 8 may rotate freely about the pin 32. Seen in operational direction, a nozzle 14 has been arranged behind the cutting disc 8, said nozzle 14 being connected to a manure line 13 connected to the manure tank trailer and passed through the rear leg of structure 27. The flow opening of the manure line 13 can be controlled by means of valve 16 pneumatically controlled through line 17. For each frame member 2 a manure line 13, a stopping valve 16 and a control line 17 are provided. Finally, as seen in operational direction, further backwards ridging discs 11 are arranged that are pivotably, in the vertical plane, connected with the other leg of the U-shaped structure 27 by means of bar 12. It is remarked that the manure applicator device according to the invention may also be provided with a controllable, preferably hydraulic lift structure (not shown) which on the one hand is fixedly attached to the fastening plate 6, and on the other hand is fixedly attached to the beam 3, so that by operating this lift structure the beam 3 and therewith all cutting discs 8 can be adjusted simulatenously at the desired (cutting) height with respect to the plate 6 and thus with respect to the manure tank trailer. In figure 2 it can be seen that the cutting disc 8 is formed by two truncated cones 9 and 10 lying with their largest base surface against one another. The diameter of the cutting disc may be 350 mm and have a thickness of 25 mm. Here, the angle α the generatrices of the surfaces of the casing of truncated cones 9 and 10 make with the plane in which the largest base surfaces are positioned, is approximately 150° which is within the preferred range of about 110 to 160°. As a result the cutting edge of the disc 8 is fairly blunt. When using the manure applicator device according to the invention, a trench 20 in the soil 21 as shown in figure 3 will then be obtained. Once the cutting disc 8 is penetrated into the soil during trench cutting and rolls on in the operational direction a trench is made wherein section 23 of the circumference 22 of the trench is formed by compressed, compacted material and the section 24 of the circumference of the trench has maintained a relatively open structure. Thus, the manure 25 supplied by means of the manure line 13 and nozzle 14, which e.g. is at a depth of from 4 to 12 cm, will substantially flow off sidewards in the direction of the arrows A.

Claims: A method for applying liquid manure into farming land or grass land comprising: cutting furrows into the ground and supplying liquid manure into the furrows, characterized in that before the manure is supplied in the furrows, the soil bounding the walls of the bottom part of the furrows is compacted so that it is less permeable for the manure than the soil bounding the walls of the furrow part extending above said bottom part. Apparatus for applying liquid manure into farming land or grass land in accordance with the method according to claim 1, comprising a frame member (2) to which at least one cutting disc (8) is rotatably mounted about a substantially horizontal axis, said cutting disc (8) being bounded by two substantially vertical spaced surfaces and two sloping surfaces (9, 10) which merge into a cutting edge, a nozzle (14) which - as seen in the moving direction of the apparatus - is arranged behind the disc to supply liquid manure into the furrow cut by the cutting disc (8) and means (4, 29, 33, 19, 31) to hold the lower part of the cutting disc (8) beneath ground level, characterized in, that said means (4, 29, 33, 19, 31) to hold the lower part of the cutting disc (8) beneath ground level maintains not only a part of the sloping surfaces (9, 10) of the disc but also a part of the vertical surfaces of the disc beneath ground level so that the furrow cut by the disc has two vertical walls and a V-shaped bottom, and that the angle α between each of the sloping surfaces of the cutting disc (8) and the vertical plane running through the cutting edge amounts 110-160° so that the soil bounding the walls of the V-shaped furrow bottom being compacted so that it is less permeable for the liquid manure than the soil bounding the walls of the vertical surfaces of the furrow.

Inventors: JANSEN ALBERTUS, JANSEN, ALBERTUS
Applicants: JANSEN ALBERTUS, JANSEN, ALBERTUS
Application year: 1991
Main classification: A01C23
IPC codes: A01C5, A01C23