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WO1997003557A1 - Appareil de desherbage a air chaud - Google Patents

Appareil de desherbage a air chaud Download PDF

Info

Publication number
WO1997003557A1
WO1997003557A1 PCT/NZ1996/000076 NZ9600076W WO9703557A1 WO 1997003557 A1 WO1997003557 A1 WO 1997003557A1 NZ 9600076 W NZ9600076 W NZ 9600076W WO 9703557 A1 WO9703557 A1 WO 9703557A1
Authority
WO
WIPO (PCT)
Prior art keywords
vegetation
container
growth
controlling
heat
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/NZ1996/000076
Other languages
English (en)
Inventor
Rodney Mitchell Innes
Jozef August Vervoort
Murray James Kite
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Waipuna International Ltd
Original Assignee
Waipuna International Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Waipuna International Ltd filed Critical Waipuna International Ltd
Priority to AU65364/96A priority Critical patent/AU6536496A/en
Publication of WO1997003557A1 publication Critical patent/WO1997003557A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01M—CATCHING, TRAPPING OR SCARING OF ANIMALS; APPARATUS FOR THE DESTRUCTION OF NOXIOUS ANIMALS OR NOXIOUS PLANTS
    • A01M21/00—Apparatus for the destruction of unwanted vegetation, e.g. weeds
    • A01M21/04—Apparatus for destruction by steam, chemicals, burning, or electricity

Definitions

  • This invention relates in general to the field of vegetation control and more particularly to vegetation control or weed-killing, comprising exposure to confined hot gases.
  • Weeds that is, plants growing in the wrong place
  • Weeds commonly require control and at least temporary eradication so that (for example) a desired crop can be grown and a commercial advantage can be realised.
  • the invention provides means for controlling the growth of vegetation, the vegetation control means comprising at least one means capable of emitting in a generally downwards direction a hot gas; the hot gas means being mounted on or in a support capable of being moved over the vegetation to direct the hot gas onto the vegetation.
  • the hot gas means comprises one or more nozzles.
  • a cover or shroud can be provided above and about the or each nozzle.
  • the hot gas means comprises a movable container including an enclosed space, the container having a substantially open base capable of being applied onto a surface, the container containing means to generate heat, means to transfer heat to gases confined within the enclosed space, and means to enhance the circulation of the gases within the space and over the surface.
  • the means to transfer heat comprises a heat exchanger capable of heating air trapped within the enclosed space.
  • Fig 1 is a longitudinal section through a towed heated chamber according to a first aspect of this invention
  • Fig 2 is a schematic longitudinal section through a towed heated chamber or container according to the invention
  • Fig 3 is a further heated chamber or container applicator.
  • Fig 4 shows some details of the heat exchanger of figure 1 .
  • Fig 5 is a longitudinal section through a towed heated chamber or container according to a second aspect of this invention
  • Fig 6 is a vertical section through the heat exchanger of figure 5
  • Fig 7 is an illustration of a head according to a third aspect of this invention.
  • Fig 8 is a diagrammatic representation of a set up for the third aspect of the invention.
  • the first and second embodiments of this invention make use of a heated chamber whilst the third embodiment illustrate the use a heated head or nozzle.
  • the first embodiment comprises an internally heated box or container 104 that may be dragged or otherwise moved over the ground 103 to be treated, the box being open at its bottom so that the ground covered at a given time by the box is exposed to the internal environment of the box.
  • the internal temperature is raised to (according to current intentions) about 600 degrees Celsius and in order to assist in the even distribution of hot gases through possible clumps of vegetation, the box includes means to forcibly agitate the air (and other gases) held inside so that weeds (which are simply any vegetation found to be growing in an undesired place) are heated to herbicidal levels and beyond.
  • One advantage of the relatively high temperature proposed is that herbicidal levels of heat extend down the stems of the established weeds and also may heat dormant or developing seeds within the ground, thus providing a longer effective duration for a single treatment.
  • the hot gases can be maintained at a temperature between 100 and 700 degrees c, but we expect that about 600 deg c is optimal between conserving energy on the one hand and providing an effective treatment on the other hand.
  • a closed container - apart from an open base - will, if made of thermally non-conductive materials 111, tend to retain heat held within it because hot gases tend to rise.
  • This type of weed control should be more efficient than one involving the use of hot water because unrecoverable heat remaining in heated yet sub-biocidally hot water left at the site of prior-art weed treatments is significant, whereas in this process the heating process is substantially free of added water.
  • a liquid fuel such as oil or diesel, or propane/butane mixtures (liquefied natural gas) or methane/ethane/butane mixtures (compressed natural gas) or hydrogen (as from solar electricity/water electrolysis processes).
  • propane/butane mixtures liquefied natural gas
  • methane/ethane/butane mixtures compressed natural gas
  • hydrogen as from solar electricity/water electrolysis processes.
  • the hot gases issuing from the flame may be directly mixed with air within the container in order to produce an environment having a high temperature.
  • the flames provide hot gases as one input to a heat exchanger (such as 106), which transfers heat to the main portion of the internal chamber.
  • a heat exchanger such as 106
  • the cooled gases from the flame are subsequently (as at 404) also introduced into the main portion of the chamber, in order to minimise waste.
  • Heat may also be at least partially developed by electrical heating, by solar furnace means, or the like. It may also be produced by burning coal dust or wood or any other fuel. Preferably a servo control means is used in order to regulate the rate of fuel delivery so that the temperature is held at a constant level regardless of variable heat loss. (Details of this have not been shown).
  • the temperature is controlled and local hot spots are avoided by use of the heat exchange devices so that we minimise, as far as possible, the risk that foliage is actually set on fire by the treatment.
  • a fire inadvertently started by the device will comprise an unacceptable complication.
  • the device is used to control weeds growing in a fire break running through a forest, it is clearly counterproductive to set the forest on fire.
  • a preferred container 104 for holding the heated, enclosed space comprises a substantially rigid structure perhaps made from a steel lining with an asbestos or other heat-resistant and insulating shield 111 within.
  • the container is preferably equipped with attachment points 102 so that it can be towed by a vehicle such as a tractor 101.
  • the container is fitted with skids or wheels (not shown) so that it glides over a surface, yet remains in contact with the surface or nearly so.
  • the open base of the container is provided with flexible borders or skirts 107 in rubbing contact with the ground (particularly on the sides and on the trailing edge) in order to at least partially seal the hot gases within the enclosed space.
  • a kind of harrow (not shown) may be installed behind the trailing edge to break down clumps of killed vegetation.
  • a rotatable fan 105 or the like is preferred as a means to cause the gases to be circulated within the container, and provide a kind of accelerated "blast heating effect" in a similar manner to a blast freezer.
  • a suitable fan is a "squirrel cage” or centrifugal fan, and may be driven by an electric motor 302 or from a power takeoff of a farm tractor or the like.
  • the fan has a high capacity so that the hot gas within the container is made to move at a high speed.
  • Fig 1 also shows a fuel storage means 110 (a gas bottle), and shows the movement of hot air within the container by the dashed broad open arrows 112.
  • the arrows 108 show the exhaust gas from the burner mixing with the recirculating gases.
  • Fig 2 shows a second design more schematically.
  • 110 is an internally stored gas bottle, perhaps a propane cylinder.
  • 105 Is a vertically oriented fan driven by a motor 201.
  • 203 Is a duct leading the hot gas into the heat exchanger 106 for further heating.
  • 202 Is a burner.
  • 109 Is a space carrying air being returned to the fan.
  • FIG 3 shows another arrangement.
  • the heat exchanger 106 is shown directing its output of hot air downwards towards the ground to be treated, and a fuel storage bottle 110 is also shown (its connection to the burner 202 and flow control means is not shown).
  • 301 Is a baffle used to direct returned hot air towards the intake of the fan 105.
  • Fig 4 shows a preferred type of heat exchanger 106 in longitudinal section. Hot gases issuing from a flame 401 are drawn through tubes of the exchanger 403 and out to an exit at 404. Meanwhile hot air to be further heated passes over the outside of the tubes 403.
  • a preferred type of tube 403 has a spiralling swaged or otherwise formed profile that encourages non-laminar flow of gases so that contact with the tube walls is enhanced and so exchange of heat is promoted.
  • the container of the invention is drawn over infested ground 103 to remove unwanted vegetation by a process of heating up the inside of the container, and maintaining the temperature despite losses of heat from time to time, causing the heated air or gas within the confined space to be rapidly circulated, and towing the container over the area at a speed that is sufficiently slow to adequately heat the vegetation beneath the container to a herbicidal temperature, but no slower, for towing it too slowly would waste time and fuel.
  • Figures 5 and 6 shows a larger version of the towable heated chamber than that shown in the first embodiment.
  • the vegetation control means 500 of figure 5 is designed to be towed behind a tractor and has been designed to produce sufficient heat for a 700mm width of treatment.
  • the fuel storage means 510 supplies fuel to a burner 502 with the flame and exhaust gases from the burner travelling in the direction of arrows 503, 504 through a combustion chamber 540 into a series of heat exchanger tubes 506.
  • These tubes 506 are made of spiral tubing.
  • the tubes are of round cross section for most of their length with a spiral formed on the surface but each end is formed as a square box section, enabling the ends of the tubes to be spot welded together so that it forms an array of tubes 509 as shown in figure 6.
  • some of the tubes can be omitted, so that a series of voids 511 may be left between the tubes 506. Each row is offset from the others to assist in airflow across the tubes.
  • the chamber 501 has an open bottom 502, surrounded by a skirt 503 formed of fibreglass, or other heat resistant material, in order to trap air and combustion gases within the chamber 501.
  • the unit itself is designed to be towed behind a tractor in a similar fashion to that shown in figure 1. It may have skids and one or more steering wheels, to assist in transporting it across the surface of the ground. It is designed primarily for use in vineyards and orchards, so that weed can be cleared between rows of plants.
  • Air is forced across the bank 509 of heat exchanger tubes in the direction of arrow 520 by a centrifugal fan 521 driven by a motor 522.
  • Exhaust gases from the combustion space 545 mix with the air from the heat exchanger, so that the gas circulating within the heated chamber 501 comprises a mixture of hot dry air and exhaust gases from the combustion chamber 540. Some of the gas will escape around the sides of the open bottom 502 of the chamber but the quantity of gas within the chamber is refreshed by the combustion gases from the burner
  • the combustion chamber 540 is heated to approximately 1200°C whilst the exhaust gas in the exhaust chamber 545 is cooled to approximately 400°C. Air passing across the heat exchanger is heated to approximately 300°C so that most of the heated air and exhaust gas in the plenum chamber 530 provides hot gas of approximately 300°C at the ground surface, in order to destroy any vegetation as the heated chamber 501 passes over the ground surface from left to right to the direction of arrow 560.
  • the combustion chamber 540 being heated to approximately 1200°C provides some radiant heat to the ground surface at the rear of plenum chamber 530 immediately below the combustion chamber.
  • the chamber is insulated to maintain heat within the chamber and efficient transfer of heat to the ground. Return air is screened to removes leaves and other material that may be picked up from the ground.
  • the chamber height above the ground can be adjusted so that the flexible skirt 503 accommodates height variations.
  • the heat exchanger of the second embodiment has the tubes north south along the main axis of the heated chamber, compared with the smaller unit of figure 1 in which the heat exchanger tubes are positioned east west across the front of the heated chamber.
  • This aspect of the invention operates by applying heat in the form of a hot gas or hot air from a nozzle to plant tissues and thereby causing lethal destruction of the chemical composition of the tissues; the destruction being generally denaturation of cytoplasm and eventual death (which occurs at temperatures generally below the boiling point of water) rather than actual carbonisation and burning away.
  • nozzle shape may be a fan unit or a cone unit
  • nozzle of fig 7 serves as an illustration.
  • a central aperture which is fed with a hot gas, preferably heated air.
  • the intention is to provide process parameters (rate of movement, size of shroud, and heat content) which may be varied so that the vegetation is maintained at a temperature for a time sufficient to cause effective tissue damage, yet not going substantially beyond the sufficient levels which would tend to be wasteful of time and energy.
  • the amount of heat that a certain area of vegetation is exposed to, and the speed of movement of the vegetation control system over the ground are preferably all controlled so that vegetation control is as optimal as possible.
  • Fig 7 shows schematically a vegetation control system 1100 according to this invention. It is to be considered as moving from right to left as suggested by the arrow.
  • 1101 Is a shroud that helps to isolate the "climate" within the treatment area from the surrounding environment. It covers a nozzle assembly having a central hot gas emitting nozzle 1102 providing a downwardly depending hot gas stream 1105.
  • nozzle assembly having a central hot gas emitting nozzle 1102 providing a downwardly depending hot gas stream 1105.
  • plants, 1108..1112 beneath the nozzles Plants 108 and 109 are as yet unaffected.
  • Plant 1110 is under treatment and plant 1112 has had the hot gas applied thereto.
  • Fig 8 shows a basic design for the apparatus of the invention.
  • a compressor 1201 feeds air to heating unit 1202 which may be, for example, an lpg heating chamber or may use other fluids such as solid fuels, gaseous fuels, or liquid fuels as appropriate.
  • the air is provided under pressure such as 50 to 100 psi but other pressures may be used.
  • Temperatures of up to 1000°c in the heated chamber 1202 are desirable but greater temperatures allow a higher temperature at the shroud which is desirable.
  • the heated gas moves along pipe, tube or hose 1203 to nozzle 1204.
  • a gas temperature in the nozzle of about 400°c to 500°c is sufficient for the purpose although lower temperatures may achieve a satisfactory result, but higher temperatures, eg up to 1000°c are desirable.
  • the hose 1203 may be up to about 30 metres in length but variables such as insulation may extend or reduce this length.
  • the construction may be vehicle mounted or be provided with a hand held nozzle arrangement.
  • This type of residue-free weed control device does not involve water; thus water storage supply is not required and the heat consumed in raising water to at least a herbicidal temperature is not used. The area treated is clearly visible as such.
  • the device includes means to minimise the risk of actually setting the vegetation on fire. The device recirculates as much of the hot gas as possible, so that heat loss is minimised.
  • a diffuse mass may be used, such as a mesh of stainless steel or the like. This will also minimise the risk of actual flames hitting the vegetation and provide a more evenly heated mass of hot, circulating gas.
  • the actual temperature may be varied.
  • the velocity of the hit gas may be varied.
  • the speed at which the container is drawn over the ground may be varied.
  • Some ground treatment may be included - such as harrowing or something to disturb the surface of the ground at the leading edge of the container.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Insects & Arthropods (AREA)
  • Pest Control & Pesticides (AREA)
  • Wood Science & Technology (AREA)
  • Zoology (AREA)
  • Environmental Sciences (AREA)
  • Catching Or Destruction (AREA)

Abstract

L'invention porte sur un dispositif de lutte contre la végétation (500) mettant en oeuvre des gaz chauds (à prédominance d'air chaud (520) et contenant quelques produits de combustion (504)) retenus dans un conteneur à fond ouvrant (501). Ce conteneur, que l'on remorque au-dessus d'une zone envahie par des mauvaises herbes, est en mesure de détruire de la végétation grâce à des températures d'environ 300 °C. La flamme (503) qui produit cette chaleur traverse une zone de combustion (540) et des tuyaux échangeurs de chaleur (506) tandis qu'un ventilateur (521) amène de l'air par ces tuyaux (506) jusqu'à un caisson de distribution à fond ouvrant (530) qui se déplace au-dessus du sol à traiter.
PCT/NZ1996/000076 1995-07-18 1996-07-16 Appareil de desherbage a air chaud Ceased WO1997003557A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AU65364/96A AU6536496A (en) 1995-07-18 1996-07-16 Heated air weed control machine

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
NZ27260295 1995-07-18
NZ272602 1995-07-18
NZ28059595 1995-12-04
NZ280595 1995-12-04

Publications (1)

Publication Number Publication Date
WO1997003557A1 true WO1997003557A1 (fr) 1997-02-06

Family

ID=26651486

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/NZ1996/000076 Ceased WO1997003557A1 (fr) 1995-07-18 1996-07-16 Appareil de desherbage a air chaud

Country Status (2)

Country Link
AU (1) AU6536496A (fr)
WO (1) WO1997003557A1 (fr)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999020103A1 (fr) * 1997-10-16 1999-04-29 Energy Savings Concepts Limited Dispositif de lutte contre les champignons, les ravageurs et les mauvaises herbes
WO1999027779A1 (fr) * 1997-11-26 1999-06-10 Charles Crowther Cope Procede et dispositif servant a steriliser le sol
WO1999038378A1 (fr) * 1998-01-29 1999-08-05 The Newson Family Trust Procede de desherbage et appareil correspondant
WO1999057978A1 (fr) * 1998-05-13 1999-11-18 Etablissements Jean Moreau Machine de traitement thermique de sols
FR2792498A1 (fr) * 1999-04-22 2000-10-27 Gaz De Petrole Dispositif de desherbage thermique a dispositif donnant de la vitesse aux gaz de combustion
FR2792499A1 (fr) * 1999-04-22 2000-10-27 Gaz De Petrole Dispositif de desherbage thermique a hotte
WO2008106970A1 (fr) 2007-03-05 2008-09-12 Envo-Dan Aps Désherbage thermique
NL1038182C2 (nl) * 2010-08-20 2012-02-21 Punt B V Werkwijze, systeem en inrichting voor onkruidbestrijding.
IT201600107423A1 (it) * 2016-10-25 2018-04-25 Cs Thermos S R L Apparecchiatura per l’eliminazione delle erbe infestanti e delle piante nocive da terreni
LU100582B1 (de) * 2017-12-22 2019-06-28 Raymond Knaus Kombimaschiene zur Unkrautvernichtung ohne Chemikalien

Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1547765A (en) * 1924-07-07 1925-07-28 Lang Edward Gus Weed and grass burner
US1698196A (en) * 1925-12-28 1929-01-08 Lang Edward Gus Vegetation, snow, and ice destroyer
US1899704A (en) * 1931-11-23 1933-02-28 Lutz George Hinton Apparatus for heating surfaces
US2531884A (en) * 1945-11-26 1950-11-28 Price C Mclemore Apparatus for cultivation of plants
US2682728A (en) * 1950-03-17 1954-07-06 Nishet Calvin Apparatus for subjecting cotton plants and the like to hot gases
US3362397A (en) * 1965-05-18 1968-01-09 Texaco Inc Weed burner
US3442262A (en) * 1967-07-28 1969-05-06 Univ Oklahoma State Thermal defoliator
US3606877A (en) * 1969-10-13 1971-09-21 Bert E Shipp Smokeless mobile field burner incinerator
US3626636A (en) * 1969-07-15 1971-12-14 Joe R Wheeler Thermal plant conditioning apparatus and method
AU7498291A (en) * 1990-03-21 1991-10-21 Ernest Deryck Humphrey Plant-killing device
DE4100221A1 (de) * 1991-01-07 1992-07-09 Hermann Tremmel Thermische unkraut- und schaedlingsbekaempfung
EP0518038A1 (fr) * 1991-06-11 1992-12-16 Rudolf Messerli Dispositif pour tuer les mauvaises herbes, plantes sauvages et vermines
DE4421416A1 (de) * 1993-07-06 1995-01-12 Cord Hemme Vorrichtung zur thermischen Unkrautbeseitigung
AU2992395A (en) * 1994-07-28 1996-02-22 Darren Charles Adey Weed killing method and apparatus

Patent Citations (14)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1547765A (en) * 1924-07-07 1925-07-28 Lang Edward Gus Weed and grass burner
US1698196A (en) * 1925-12-28 1929-01-08 Lang Edward Gus Vegetation, snow, and ice destroyer
US1899704A (en) * 1931-11-23 1933-02-28 Lutz George Hinton Apparatus for heating surfaces
US2531884A (en) * 1945-11-26 1950-11-28 Price C Mclemore Apparatus for cultivation of plants
US2682728A (en) * 1950-03-17 1954-07-06 Nishet Calvin Apparatus for subjecting cotton plants and the like to hot gases
US3362397A (en) * 1965-05-18 1968-01-09 Texaco Inc Weed burner
US3442262A (en) * 1967-07-28 1969-05-06 Univ Oklahoma State Thermal defoliator
US3626636A (en) * 1969-07-15 1971-12-14 Joe R Wheeler Thermal plant conditioning apparatus and method
US3606877A (en) * 1969-10-13 1971-09-21 Bert E Shipp Smokeless mobile field burner incinerator
AU7498291A (en) * 1990-03-21 1991-10-21 Ernest Deryck Humphrey Plant-killing device
DE4100221A1 (de) * 1991-01-07 1992-07-09 Hermann Tremmel Thermische unkraut- und schaedlingsbekaempfung
EP0518038A1 (fr) * 1991-06-11 1992-12-16 Rudolf Messerli Dispositif pour tuer les mauvaises herbes, plantes sauvages et vermines
DE4421416A1 (de) * 1993-07-06 1995-01-12 Cord Hemme Vorrichtung zur thermischen Unkrautbeseitigung
AU2992395A (en) * 1994-07-28 1996-02-22 Darren Charles Adey Weed killing method and apparatus

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
DERWENT ABSTRACT, Accession No. 83-780987/40, Class P14; & SU,A,976 916 (TURK UNIV) 5 December 1982. *
DERWENT ABSTRACT, Accession No. 92-240176/29, Class P14; & SU,A,1 667 788 (TASHK AGRIC IRRIGATION MECHN ENG INST) 7 August 1991. *

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1999020103A1 (fr) * 1997-10-16 1999-04-29 Energy Savings Concepts Limited Dispositif de lutte contre les champignons, les ravageurs et les mauvaises herbes
WO1999027779A1 (fr) * 1997-11-26 1999-06-10 Charles Crowther Cope Procede et dispositif servant a steriliser le sol
WO1999038378A1 (fr) * 1998-01-29 1999-08-05 The Newson Family Trust Procede de desherbage et appareil correspondant
WO1999057978A1 (fr) * 1998-05-13 1999-11-18 Etablissements Jean Moreau Machine de traitement thermique de sols
FR2778530A1 (fr) * 1998-05-13 1999-11-19 Moreau Jean Ets Machine de traitement thermique de sols
FR2792498A1 (fr) * 1999-04-22 2000-10-27 Gaz De Petrole Dispositif de desherbage thermique a dispositif donnant de la vitesse aux gaz de combustion
FR2792499A1 (fr) * 1999-04-22 2000-10-27 Gaz De Petrole Dispositif de desherbage thermique a hotte
WO2000064250A1 (fr) * 1999-04-22 2000-11-02 Compagnie Des Gaz De Petrole Primagaz Dispositif de desherbage thermique a hotte
WO2000064251A1 (fr) * 1999-04-22 2000-11-02 Compagnie Des Gaz De Petrole Primagaz Dispositif de desherbage thermique a dispositif donnant de la vitesse aux gaz de combustion
WO2008106970A1 (fr) 2007-03-05 2008-09-12 Envo-Dan Aps Désherbage thermique
NL1038182C2 (nl) * 2010-08-20 2012-02-21 Punt B V Werkwijze, systeem en inrichting voor onkruidbestrijding.
EP2420139A3 (fr) * 2010-08-20 2012-05-02 Punt B.V. Méthode, système et dispositif pour lutter contre les adventices
IT201600107423A1 (it) * 2016-10-25 2018-04-25 Cs Thermos S R L Apparecchiatura per l’eliminazione delle erbe infestanti e delle piante nocive da terreni
EP3315027A1 (fr) * 2016-10-25 2018-05-02 CS THERMOS s.r.l. Dispositif pour éliminer des mauvaises herbes
LU100582B1 (de) * 2017-12-22 2019-06-28 Raymond Knaus Kombimaschiene zur Unkrautvernichtung ohne Chemikalien

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