EP1596645A1 - Soil working method and apparatus - Google Patents

Soil working method and apparatus

Info

Publication number
EP1596645A1
EP1596645A1 EP04711642A EP04711642A EP1596645A1 EP 1596645 A1 EP1596645 A1 EP 1596645A1 EP 04711642 A EP04711642 A EP 04711642A EP 04711642 A EP04711642 A EP 04711642A EP 1596645 A1 EP1596645 A1 EP 1596645A1
Authority
EP
European Patent Office
Prior art keywords
ploughing
soil
shallow
plough body
depth
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.)
Withdrawn
Application number
EP04711642A
Other languages
German (de)
French (fr)
Inventor
Magne Skjaveland
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.)
Kverneland AS
Original Assignee
Kverneland AS
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 Kverneland AS filed Critical Kverneland AS
Publication of EP1596645A1 publication Critical patent/EP1596645A1/en
Withdrawn legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
    • A01B79/00—Methods for working soil
    • A01B79/02—Methods for working soil combined with other agricultural processing, e.g. fertilising, planting
    • A—HUMAN NECESSITIES
    • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01B—SOIL WORKING IN AGRICULTURE OR FORESTRY; PARTS, DETAILS, OR ACCESSORIES OF AGRICULTURAL MACHINES OR IMPLEMENTS, IN GENERAL
    • A01B17/00—Ploughs with special additional arrangements, e.g. means for putting manure under the soil, clod-crushers ; Means for breaking the subsoil
    • A01B17/002—Means for putting manure, debris, straw or the like under the soil

Definitions

  • This invention relates to a soil working method and apparatus, to prepare the soil prior to seeding.
  • the basic purpose of soil tillage is to provide a favourable soil environment for the germination and growth of a particular seed crop. Seedbed requirements for satisfactory germination are sufficient warmth, sufficient air, adequate moisture and a layer of soil between the seed and the surface, which can be penetrated by the upward sprouting of the particular seed.
  • ploughing is also effective in killing weeds present in the surface of the unworked soil.
  • the disadvantage of ploughing is, however, that it is slow and expensive, and in many areas is not suitable because of problems with soil erosion. h such areas, it has therefore become common to use direct-seeding or drilling techniques, and no-tillage technologies. By such technologies, the surface of the unworked soil is left more or less undisturbed after seeding.
  • the disadvantages of these methods are, among others, the following:
  • weedkillers such as herbicides
  • snails normally thrive in the straw stubble and residue normally present in the unworked soil, especially in moist weather, and also have to be killed with poison
  • weed killing and snail killing involves chemical cost and additional labour cost, and also is disadvantageous to the environment.
  • the present invention is therefore concerned primarily with a new and improved method of soil working of unworked soil, prior to seeding, using a new design of plough body and which avoids the disadvantages which are a consequence of (a) conventional deep ploughing of unworked soil and (b) direct drilling of seed into unworked soil.
  • a soil cultivating and seeding method applied to unworked soil having straw stubble and / or weed in the surface of the soil, and which comprises: driving a plough body through unworked soil at a shallow depth below the surface (preferably at less than half the depth of conventional ploughing), and at a speed which is greater than the speed of a plough body carrying out conventional ploughing at a greater depth, the plough body having deflectors arranged to engage the shallow furrow slices turned-over by the plough body and to apply a working and guiding action to the furrow slices and leaving at least part of the straw stubble and / or weed remaining exposed; and subsequently seeding the worked-on furrow slices.
  • a second ploughing stage is carried out, in which a plough body is driven through the soil at a greater depth than the shallow ploughing depth, in order further to work the soil and to bury the exposed straw stubble and / or weed.
  • the second ploughing stage will usually be carried out after a sufficient period of time in which the exposed straw stubble etc (and other vegetable matter) has been subjected to natural decomposition processes, arising out of contact with ambient air, moisture etc.
  • the second ploughing stage is at a greater depth, (say more than twice the depth of the shallow ploughing), and in this second stage the deflectors on the plough body are no longer necessary and may be removed.
  • the shallow depth ploughing may be carried out at a depth of about 7 to 8cm, which compares with conventional ploughing at a depth of about 20 to 25cm.
  • the formed speed of the shallow ploughing may be much greater than the speed of conventional (deeper ploughing), since there is less soil resistance to forward movement of the plough body.
  • the plough body therefore, may be driven through the unworked soil at speeds of up to, say, 15km per hour.
  • the subsequent seeding stage may be carried out using an integrated plough / packer / seeder e.g. of the type disclosed in our European publication no. 1317877, and the disclosure of which is incorporated herein by such reference.
  • the plough body utilised in carrying out the method of the invention may be of the general type disclosed in more detail in our international publication no. WO03/015495, the disclosure of which also is incorporated herein by such reference.
  • Preferred examples of soil cultivating and seeding methods according to the invention will now be described in detail, by way of example only, with reference to the accompanying drawings, in which:
  • Figure 1 is a schematic side view illustration of furrow slices formed by conventional driving of plough bodies through unworked soil at conventional depths and speeds;
  • Figure 2 is a schematic side view illustration of turned-over furrow slices formed by shallow ploughing of unworked soil, using the improved plough body, in a first stage of a method of the invention, and showing residual straw stubble and weed partly buried, and also partly exposed to prevailing weather conditions;
  • Figure 3 is a similar view, showing a subsequent stage in the soil working operation of a method of the invention.
  • Figures 4 to 7 are perspective illustrations, from different aspects, of a preferred design of plough body for use in carrying out the improved soil cultivating and seeding method of the invention
  • Figures 8 and 9 are plan view illustrations of an integrated plough / packer / seeder combination, which may be used to carry out a method according to the invention, and which are described in more detail in our European publication no. 1317877; and
  • Figures 10 to 16 illustrate further examples of plough body which may be used to carry out the method of the invention, and which are disclosed in more detail in our published international application no. WO03/015495.
  • Figure 1 of the drawings shows conventional formation of furrow slices 100 turned-over by a plough body during conventional ploughing, and with the projecting or exposed straw stubble 101 and other weeds and vegetable matter more or less lying between successive furrow slices 100 after the ploughing operations.
  • Typical ploughing depth of conventional ploughing as shown in Figure 1 may be at a depth of about 20 to 25cm.
  • FIG. 2 is a schematic side view illustration of a first stage of soil cultivating operation according to the invention, in which one or more plough bodies are driven through unworked soil 102, having upwardly projecting straw stubble and other vegetation 101, and in which the ploughing is carried out at a shallow depth, which typically will be less than half the depth of conventional deep ploughing.
  • the shallow ploughing depth could be of the order of 7 to 8cm, and only relatively shallow furrow slices 103 are formed with a substantial amount of vegetable matter (stubble) 101 remaining exposed.
  • the farmer can carry out a second and deeper ploughing operation. Necessarily, the deeper ploughing will be carried out at a slower speed in view of the greater resistance of the soil to forward movement of the plough bodies. This second deeper ploughing operation can be carried out without use of deflectors 31, 32 on the plough body 30, (which will be described in more detail below with reference to Figures 4 to 7).
  • the second stage of ploughing is illustrated schematically in Figure 3, and it will be noted now that the thicker furrow slices 100a now substantially bury the now at least partly decomposed stubble / vegetable matter 101 of the shallow furrow slices 103.
  • FIGS. 4 to 7 show perspective illustrations of one preferred design of improved plough body 30 for use in carrying out the method of the invention.
  • the plough body is driven through the ground at a shallow depth, in the first stage of the cultivation operation through unworked soil, and it will be noted that one or more deflectors 31 are mounted on the plough body (and also an advance deflector 32 located forwardly of the plough body 30), to assist in the soil working operation.
  • the plough body is driven through the unworked soil at a shallow depth, and at a greater speed than the speed of a plough body carrying out conventional ploughing, and typically at speeds of up to 15km per hour.
  • the plough body turns-over the unworked soil to form the shallow furrow slices shown in Figure 2, and during this operation, the deflectors 31 on the plough body (and also the advance deflector 32) apply a working and guiding action to each furrow slice, and prevent the soil from being thrown laterally in an uncontrolled manner, (which otherwise might happen when driving a plough body at high speed through unworked soil at a shallow depth).
  • the deflectors 31 take the form of fingers which stop the soil from being spread apart too much, and also deflect the soil into the furrow where it is meant to be after the ploughing operation. At the same time, the soil engaged by the deflectors is well crumbled, and soil, straw residue and other vegetable matter are well-mixed together.
  • seeding operations are carried out on the worked-on slices.
  • the seeding operation may take place simultaneously with the second ploughing stage.
  • the farmer could carry out ploughing, seeding and packing during a single pass. This would be favourable when there is a problem with soil conditions, which might give rise to undesired soil erosion. Then, the soil surface is black for only a short period of time from seeding through to germination.
  • the new method of shallow ploughing is a combination of ploughing and cultivating.
  • the shallow ploughing needs less energy than a cultivator, typically 20% less. This is a cost advantage to the farmer, with lower fuel costs, and also is advantageous to the environment.
  • Figures 8 and 9 show a typical example of integrated plough / packer / seeder combination which may be used in carrying out the improved soil cultivating method and seeding operation according to the invention.
  • Figures 8 and 9 disclose a fully mounted reversible plough 10 which comprises a head stock 11, a plough frame 12 having pairs of reversible plough bodies 13, and means 14 mounting the plough frame 12 on the headstock 11 for rotational movement between two ploughing positions corresponding to left side ploughing and right side ploughing by the plough body 13 in order to reverse the plough body.
  • the combination also incorporates a packer 15, and also a seeding unit (not shown in detail) as part of the combination. Alternatively, a separate seeding unit maybe utilised, after completion of ploughing and packing operations.
  • Figures 10 to 16 illustrate other designs of plough body with deflectors which may be used in carrying out a method according to the invention.
  • the plough body shown in Figures 10 to 16 is designated generally by reference 40, and comprises a plough beam 41 for mounting the assembly on a plough frame, a mouldboard 42 provided with a share 43 and mounted on the plough beam 41 via a saddle 47, and which are operative to form a furrow.
  • a landside 44 is mounted on the plough beam 41, also via the saddle 47, and is operative to stabilise or position the plough body assembly during ploughing.
  • the landside 44 has a forward portion 45 and a rearward portion 46.
  • a two part blade 45a, 45b has a first part 45a which extends upwardly of the share 43 and is operative to form a portion of a furrow slice, and the second part 45b is shaped to direct the furrow slice portion formed by the first part 45a laterally to be deposited in the furrow before the remainder of the furrow slice is deposited in the furrow by the mould board 42.
  • a curbed guide strip 45c is secured to a trailing end of the second part or "wing" 45b via a single bolt.

Landscapes

  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Soil Sciences (AREA)
  • Environmental Sciences (AREA)
  • Soil Working Implements (AREA)

Abstract

A soil cultivating and seeding method is applied to unworked soil (102) having straw stubble/vegetable matter (101), and which comprises the following method steps: driving a plough body (30) through unworked soil (102) at a shallow depth below the surface to form relatively shallow turned-over furrow slices (103), (preferably at less than half the depth of conventional ploughing), and at a speed which is greater than the speed of a plough body carrying out conventional plougher at a greater depth, in which the plough body has deflectors (31, 32) arranged to engage the shallow furrow slices (103) turned over by the plough body (30), and which apply a working and guiding action to the furrow slices, with at least part of the straw stubble/vegetable matter (101) remaining exposed to decompose by weathering action; and subsequently seeding the worked-on slices after sufficient decomposition of the vegetable matter (101).

Description

SOIL WORKING METHOD AND APPARATUS
This invention relates to a soil working method and apparatus, to prepare the soil prior to seeding.
The basic purpose of soil tillage is to provide a favourable soil environment for the germination and growth of a particular seed crop. Seedbed requirements for satisfactory germination are sufficient warmth, sufficient air, adequate moisture and a layer of soil between the seed and the surface, which can be penetrated by the upward sprouting of the particular seed.
The tillage of the soil has been carried out for generations by ploughing and harrowing. Ploughing is also effective in killing weeds present in the surface of the unworked soil. The disadvantage of ploughing is, however, that it is slow and expensive, and in many areas is not suitable because of problems with soil erosion. h such areas, it has therefore become common to use direct-seeding or drilling techniques, and no-tillage technologies. By such technologies, the surface of the unworked soil is left more or less undisturbed after seeding. The disadvantages of these methods are, among others, the following:
Any weed present in the surface of the unworked soil has to be eradicated by using weedkillers such as herbicides; snails normally thrive in the straw stubble and residue normally present in the unworked soil, especially in moist weather, and also have to be killed with poison; weed killing and snail killing involves chemical cost and additional labour cost, and also is disadvantageous to the environment.
The present invention is therefore concerned primarily with a new and improved method of soil working of unworked soil, prior to seeding, using a new design of plough body and which avoids the disadvantages which are a consequence of (a) conventional deep ploughing of unworked soil and (b) direct drilling of seed into unworked soil.
According to the invention, there is provided a soil cultivating and seeding method applied to unworked soil having straw stubble and / or weed in the surface of the soil, and which comprises: driving a plough body through unworked soil at a shallow depth below the surface (preferably at less than half the depth of conventional ploughing), and at a speed which is greater than the speed of a plough body carrying out conventional ploughing at a greater depth, the plough body having deflectors arranged to engage the shallow furrow slices turned-over by the plough body and to apply a working and guiding action to the furrow slices and leaving at least part of the straw stubble and / or weed remaining exposed; and subsequently seeding the worked-on furrow slices.
Preferably, prior to the seeding of the worked-on furrow slices, a second ploughing stage is carried out, in which a plough body is driven through the soil at a greater depth than the shallow ploughing depth, in order further to work the soil and to bury the exposed straw stubble and / or weed.
The second ploughing stage will usually be carried out after a sufficient period of time in which the exposed straw stubble etc (and other vegetable matter) has been subjected to natural decomposition processes, arising out of contact with ambient air, moisture etc.
The second ploughing stage is at a greater depth, (say more than twice the depth of the shallow ploughing), and in this second stage the deflectors on the plough body are no longer necessary and may be removed. h a preferred method of carrying out the soil cultivating and seeding method of the invention, the shallow depth ploughing may be carried out at a depth of about 7 to 8cm, which compares with conventional ploughing at a depth of about 20 to 25cm. Also, the formed speed of the shallow ploughing may be much greater than the speed of conventional (deeper ploughing), since there is less soil resistance to forward movement of the plough body.
The plough body, therefore, may be driven through the unworked soil at speeds of up to, say, 15km per hour.
The subsequent seeding stage may be carried out using an integrated plough / packer / seeder e.g. of the type disclosed in our European publication no. 1317877, and the disclosure of which is incorporated herein by such reference.
The plough body utilised in carrying out the method of the invention may be of the general type disclosed in more detail in our international publication no. WO03/015495, the disclosure of which also is incorporated herein by such reference. Preferred examples of soil cultivating and seeding methods according to the invention will now be described in detail, by way of example only, with reference to the accompanying drawings, in which:
Figure 1 is a schematic side view illustration of furrow slices formed by conventional driving of plough bodies through unworked soil at conventional depths and speeds;
Figure 2 is a schematic side view illustration of turned-over furrow slices formed by shallow ploughing of unworked soil, using the improved plough body, in a first stage of a method of the invention, and showing residual straw stubble and weed partly buried, and also partly exposed to prevailing weather conditions;
Figure 3 is a similar view, showing a subsequent stage in the soil working operation of a method of the invention;
Figures 4 to 7 are perspective illustrations, from different aspects, of a preferred design of plough body for use in carrying out the improved soil cultivating and seeding method of the invention;
Figures 8 and 9 are plan view illustrations of an integrated plough / packer / seeder combination, which may be used to carry out a method according to the invention, and which are described in more detail in our European publication no. 1317877; and
Figures 10 to 16 illustrate further examples of plough body which may be used to carry out the method of the invention, and which are disclosed in more detail in our published international application no. WO03/015495.
Referring first to Figure 1 of the drawings, this shows conventional formation of furrow slices 100 turned-over by a plough body during conventional ploughing, and with the projecting or exposed straw stubble 101 and other weeds and vegetable matter more or less lying between successive furrow slices 100 after the ploughing operations. Typical ploughing depth of conventional ploughing as shown in Figure 1 may be at a depth of about 20 to 25cm.
Figure 2 is a schematic side view illustration of a first stage of soil cultivating operation according to the invention, in which one or more plough bodies are driven through unworked soil 102, having upwardly projecting straw stubble and other vegetation 101, and in which the ploughing is carried out at a shallow depth, which typically will be less than half the depth of conventional deep ploughing. In the illustration of Figure 2, the shallow ploughing depth could be of the order of 7 to 8cm, and only relatively shallow furrow slices 103 are formed with a substantial amount of vegetable matter (stubble) 101 remaining exposed.
It will be apparent from Figure 2 that the stubble and other vegetable matter 101 is only partly buried, and a substantial portion remains exposed at the upper surfaces of the turned-over furrow slices, so as to have improved contact with air and also moisture (in the air and in the soil), to speed-up the natural decomposition processes.
When it is concluded that the decomposition processes have gone far enough i.e. after a sufficient length of time, the farmer can carry out a second and deeper ploughing operation. Necessarily, the deeper ploughing will be carried out at a slower speed in view of the greater resistance of the soil to forward movement of the plough bodies. This second deeper ploughing operation can be carried out without use of deflectors 31, 32 on the plough body 30, (which will be described in more detail below with reference to Figures 4 to 7).
The second stage of ploughing is illustrated schematically in Figure 3, and it will be noted now that the thicker furrow slices 100a now substantially bury the now at least partly decomposed stubble / vegetable matter 101 of the shallow furrow slices 103.
Referring now to Figures 4 to 7, these Figures show perspective illustrations of one preferred design of improved plough body 30 for use in carrying out the method of the invention. The plough body is driven through the ground at a shallow depth, in the first stage of the cultivation operation through unworked soil, and it will be noted that one or more deflectors 31 are mounted on the plough body (and also an advance deflector 32 located forwardly of the plough body 30), to assist in the soil working operation.
The plough body is driven through the unworked soil at a shallow depth, and at a greater speed than the speed of a plough body carrying out conventional ploughing, and typically at speeds of up to 15km per hour. The plough body turns-over the unworked soil to form the shallow furrow slices shown in Figure 2, and during this operation, the deflectors 31 on the plough body (and also the advance deflector 32) apply a working and guiding action to each furrow slice, and prevent the soil from being thrown laterally in an uncontrolled manner, (which otherwise might happen when driving a plough body at high speed through unworked soil at a shallow depth). The deflectors 31 take the form of fingers which stop the soil from being spread apart too much, and also deflect the soil into the furrow where it is meant to be after the ploughing operation. At the same time, the soil engaged by the deflectors is well crumbled, and soil, straw residue and other vegetable matter are well-mixed together.
Subsequent to the second ploughing stage at greater depth, shown in Figure 3, seeding operations are carried out on the worked-on slices. The seeding operation may take place simultaneously with the second ploughing stage.
Alternatively, the farmer could carry out ploughing, seeding and packing during a single pass. This would be favourable when there is a problem with soil conditions, which might give rise to undesired soil erosion. Then, the soil surface is black for only a short period of time from seeding through to germination.
The new method of shallow ploughing is a combination of ploughing and cultivating. The shallow ploughing needs less energy than a cultivator, typically 20% less. This is a cost advantage to the farmer, with lower fuel costs, and also is advantageous to the environment.
Figures 8 and 9 show a typical example of integrated plough / packer / seeder combination which may be used in carrying out the improved soil cultivating method and seeding operation according to the invention.
Figures 8 and 9 disclose a fully mounted reversible plough 10 which comprises a head stock 11, a plough frame 12 having pairs of reversible plough bodies 13, and means 14 mounting the plough frame 12 on the headstock 11 for rotational movement between two ploughing positions corresponding to left side ploughing and right side ploughing by the plough body 13 in order to reverse the plough body. The combination also incorporates a packer 15, and also a seeding unit (not shown in detail) as part of the combination. Alternatively, a separate seeding unit maybe utilised, after completion of ploughing and packing operations.
Figures 10 to 16 illustrate other designs of plough body with deflectors which may be used in carrying out a method according to the invention.
The plough body shown in Figures 10 to 16 is designated generally by reference 40, and comprises a plough beam 41 for mounting the assembly on a plough frame, a mouldboard 42 provided with a share 43 and mounted on the plough beam 41 via a saddle 47, and which are operative to form a furrow. A landside 44 is mounted on the plough beam 41, also via the saddle 47, and is operative to stabilise or position the plough body assembly during ploughing.
The landside 44 has a forward portion 45 and a rearward portion 46. A two part blade 45a, 45b has a first part 45a which extends upwardly of the share 43 and is operative to form a portion of a furrow slice, and the second part 45b is shaped to direct the furrow slice portion formed by the first part 45a laterally to be deposited in the furrow before the remainder of the furrow slice is deposited in the furrow by the mould board 42.
A curbed guide strip 45c is secured to a trailing end of the second part or "wing" 45b via a single bolt.

Claims

1. A soil cultivating and seeding method applied to unworked soil 102 having straw stubble / vegetable matter 101, and which comprises: driving a plough body 30 through unworked soil 102 at a shallow depth below the surface to form relatively shallow turned-over furrow slices 103 (preferably at less than half the depth of conventional ploughing), and at a speed which is greater than the speed of a plough body carrying out conventional ploughing at a greater depth, the plough body having deflectors 31,32 arranged to engage the shallow furrow slices 103 turned- over by the plough body 30 and to apply a working and guiding action to the furrow slices, with at least part of the straw stubble / vegetable matter 101 remaining exposed to decompose by weathering action; and subsequently seeding the worked-on slices after sufficient decomposition of the vegetable matter 101.
2. A method according to claim 1, in which a second ploughing stage is carried out, prior to the seeding operation, in which a plough body 30 is driven through the soil at a greater depth than the shallow ploughing depth, in order further to work the soil and to bury exposed straw stubble / vegetable matter 101 with a covering layer of further furrow slices 100a.
3. A method according to claim 2, in which the second ploughing stage is carried out after a sufficient period of time in which the exposed straw stubble / vegetable matter has been subjected to natural decomposition processes.
4. A method according to claim 2 or 3, in which the second ploughing stage is carried out at a greater depth than the first shallow ploughing stage, and deflectors 31,32 provided on the plough body(s) 30 for the shallow ploughing stage are removed.
5. A method according to any one of claims 1 to 4, in which the shallow ploughing depth is carried out at a depth of about 7 to 8 cm.
6. A method according to any one of the preceding claims, in which the speed of the plough body 30 during the first shallow ploughing stage is up to 15km per hour.
7. A method according to any one of the preceding claims, in which an integrated plough / packer / seeder 10,15 is used to carry out final soil working and seeding operations.
EP04711642A 2003-02-22 2004-02-17 Soil working method and apparatus Withdrawn EP1596645A1 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB0304092A GB0304092D0 (en) 2003-02-22 2003-02-22 Soil working method and apparatus
GB0304092 2003-02-22
PCT/GB2004/000619 WO2004073387A1 (en) 2003-02-22 2004-02-17 Soil working method and apparatus

Publications (1)

Publication Number Publication Date
EP1596645A1 true EP1596645A1 (en) 2005-11-23

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Country Status (3)

Country Link
EP (1) EP1596645A1 (en)
GB (1) GB0304092D0 (en)
WO (1) WO2004073387A1 (en)

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CN105814998A (en) * 2016-03-29 2016-08-03 黑龙江北方孝道源农业科技发展有限公司 Cold region straw concentrated field returning biological decomposing temperature increasing environment-friendly and efficient agricultural engineering

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CN102177774B (en) * 2010-12-06 2012-09-05 西南大学 Method for enhancing evaporation resisting and water preserving ability of sandy soil
CN102523778A (en) * 2012-01-30 2012-07-04 范兆科 Method for improving soil in freshly plowed land with ferment bacteria
CN104285532A (en) * 2014-10-15 2015-01-21 重庆市农业科学院 Reclamated slope purple soil rapid fertilizing method
CN105144896A (en) * 2015-07-31 2015-12-16 江苏建康职业学院 Soil improving method
CN106545017A (en) * 2016-10-10 2017-03-29 安徽省交通规划设计研究总院股份有限公司 A kind of soil basketing method of Plain rolling terrain highway construction soil
CN108207512B (en) * 2018-01-08 2020-10-09 临汾经济技术开发区科润农业技术咨询中心 Vegetable ditch-attaching planting method
CN113826461A (en) * 2021-09-26 2021-12-24 宿迁市设施园艺研究院 Solanaceous vegetable straw in-situ returning method

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DK170454B1 (en) * 1992-12-21 1995-09-04 Baltea Spa Protective screen for a visual display device Protective screen for a visual display device
GB0119901D0 (en) * 2001-08-15 2001-10-10 Kverneland Asa Improvement plough body assembly
GB0126936D0 (en) * 2001-11-09 2002-01-02 Kverneland Asa Reversible plough

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Publication number Priority date Publication date Assignee Title
CN105814998A (en) * 2016-03-29 2016-08-03 黑龙江北方孝道源农业科技发展有限公司 Cold region straw concentrated field returning biological decomposing temperature increasing environment-friendly and efficient agricultural engineering

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Publication number Publication date
WO2004073387A1 (en) 2004-09-02
GB0304092D0 (en) 2003-03-26
WO2004073387A8 (en) 2005-01-20

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