CN107251701A - A kind of garlic digging harvester - Google Patents

A kind of garlic digging harvester Download PDF

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Publication number
CN107251701A
CN107251701A CN201710575406.6A CN201710575406A CN107251701A CN 107251701 A CN107251701 A CN 107251701A CN 201710575406 A CN201710575406 A CN 201710575406A CN 107251701 A CN107251701 A CN 107251701A
Authority
CN
China
Prior art keywords
garlic
frame
flase floor
bar
harvest
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.)
Pending
Application number
CN201710575406.6A
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Chinese (zh)
Inventor
张利娟
耿令新
李更更
孙成龙
杨芳
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.)
Henan University of Science and Technology
Original Assignee
Henan University of Science and Technology
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 Henan University of Science and Technology filed Critical Henan University of Science and Technology
Priority to CN201710575406.6A priority Critical patent/CN107251701A/en
Publication of CN107251701A publication Critical patent/CN107251701A/en
Pending legal-status Critical Current

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Classifications

    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01DHARVESTING; MOWING
    • A01D13/00Diggers, e.g. potato ploughs
    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01DHARVESTING; MOWING
    • A01D33/00Accessories for digging harvesters
    • AHUMAN NECESSITIES
    • A01AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
    • A01DHARVESTING; MOWING
    • A01D33/00Accessories for digging harvesters
    • A01D33/08Special sorting and cleaning mechanisms

Abstract

The present invention relates to field of agricultural machinery, specifically a kind of garlic digging harvester.Including harvest operation system and the advance system for promoting harvest operation system to advance, harvest operation system includes frame, one end of frame is connected with advance system, the other end is provided with gauge wheel, and garlic bar excision mechanism, digger blade, Qu Tu mechanisms and harvest case are sequentially provided with by gauge wheel to advance system direction in frame.The present invention is provided with garlic bar removal mechanism between digger blade, is dished out in column in garlic Tanaka after can garlic bar be cut off, and is easy to the collection to garlic bar to reprocess.The present invention's goes native apparatus structure simple, it is easy to accomplish, and interference or insignificant vibrations will not be caused to miscellaneous part, can make digger blade that there is longer service life so that ensure it is of the invention it is efficient, stably, continuous operation.

Description

A kind of garlic digging harvester
Technical field
The present invention relates to field of agricultural machinery, specifically a kind of garlic digging harvester.
Background technology
China is garlic producing country, country of consumption and exported country maximum in the world, long-term 9000000 mu of cultivated area, yield About 10,000,000 tons, the 75% of worldwide production is accounted for, is related to the family of garlic farmers more than 500 ten thousand.Current China garlic harvest relies primarily on people's work Industry, labor intensity is big, taking farming season, many, seasonal strong, efficiency is low, it has also become the production development of influence garlic, the master of Industry growth Problem is wanted, full-automatic receipts garlic obtains the inexorable trend that machine is planting garlic industry development.
But there are several difficult points to garlic harvest in automated machine, one is to dig garlic high-volume by digger blade The attachment soil on garlic is attached to after going out, two be the processing of the useless garlic bar of aerial part.
If attachment soil can not be returned into field in time but enter harvest case with garlic, although can be quickly by garlic Collect, but on the one hand which stills need that largely manually specially garlic is carried out to remove soil.On the other hand adhere to bringing into for soil to lead Harvest case is caused to need bigger capacity, corresponding cropper produces more energy loss.And it is thin to easily cause soil top layer The serious loss of the ventilative chiltern soil layer of pine, is unfavorable for the sustainable development of planting garlic industry.Exist in the prior art a kind of logical The garlic digging harvester that the attachment soil that vibratory sieve will be on garlic is removed is crossed, can be by between garlic and garlic and garlic and vibratory sieve Collision between inwall will adhere to soil and remove, but because Structure of Vibrating Screen is complicated in practical application, fault rate is higher.In order to protect Good native effect of going is demonstrate,proved, vibratory sieve will keep higher shake frequency and amplitude, easily drive cropper upper digger blade and other portions Part resonates, and prevents digger blade from smoothly performing digging operation, and easily occurs abrasion or even turned, influences efficiency of crop.Garlic Continuous collision of the head in vibratory sieve also easily causes the crush injury of fresh garlic, is unfavorable for storing and sells.
The garlic bar of garlic receive it is previous as should wipe out, otherwise the Working mechanism easily with garlic digging harvester is wound, Cause failure.Although garlic digging harvester of the prior art has various garlic bars to wipe out function, but often with cut with Throw away, garlic bar the shedding in garlic field without chapter at random of cutting, it is possible to cause winding to block to cropper, and in garlic Also inconvenience carries out unified collection reprocessing to garlic bar after the completion of harvest.
The content of the invention
The present invention is intended to provide a kind of automaticity is high, garlic effectively removes soil and keeps complete, and garlic bar is cleared up thoroughly simultaneously It is easy to the garlic digging harvester of later collection.
In order to solve the above technical problems, the technical solution adopted by the present invention is:A kind of garlic digging harvester, its feature exists In:Including harvest operation system and the advance system for promoting harvest operation system to advance, harvest operation system includes frame, machine One end of frame is connected with advance system, and the other end is provided with gauge wheel, is set successively by gauge wheel to advance system direction in frame There is garlic bar to cut off mechanism, digger blade, Qu Tu mechanisms and harvest case.
It is preferred that, the garlic bar excision mechanism includes the cutter shaft and conveying worm be arrangeding in parallel, is spaced and sets on cutter shaft It is equipped with many cutter that garlic bar is cut off to for being rotated by cutter shaft and throw to the garlic bar of cut-out conveying worm, the spiral The housing upper of conveyer offers opening for receiving garlic bar and for aiding in garlic bar to enter leading for the opening vertically To plate, being provided with frame positioned at the conveying end of conveying worm is used to shedding garlic bar into the opening to ground.
It is preferred that, the cross section of the cutter shaft is regular polygon, along the length of cutter shaft on each side of cutter shaft Direction laminating is provided with cutter, and the blade of all cutteves is parallel with the axis of cutter shaft, and week of the cut direction along cutter shaft To setting in the same direction..
It is preferred that, the digger blade, which is tilted, is fixed on bottom of the frame, and the Qu Tu mechanisms include advancing along harvest machine operation The first flase floor and the second flase floor that direction is connected to digger blade rear in turn and is obliquely installed from front to back, the first grid The excavation direction of grid direction digger blade on plate is parallel, the excavation direction in grid direction and digger blade on the second flase floor It is perpendicular, it is provided with the ribbon conveyer parallel to the second flase floor, belt conveying positioned at the top of the second flase floor in frame The conveyer belt of machine is provided with to be used to coordinate with the grid on the second flase floor rubs broken and by the second grid by the attachment soil on garlic The hack element fallen on plate.
It is preferred that, the hack element is many fixed finger-type rubber bars on the conveyor belt in interval.
It is preferred that, the harvest case is arranged on the lower section for being located at the second flase floor in frame, and harvest case is used to receive garlic Opening positioned at ribbon conveyer conveying direction end;One block of side plate that harvest case is located at immediately below the second flase floor, which is tilted, to be set Put, and form the sliding native plate that bottom surface is slided to for the hack fallen on the second flase floor.
It is preferred that, advance system includes car body, provided with engine and the decelerator being connected with engine above car body, Provided with the Athey wheel being connected with decelerator by transmission belt below car body.
It is preferred that, the cutter shaft, conveying worm and ribbon conveyer are by a jackshaft being arranged in frame Driven by chain sprocket structure, the output shaft of the jackshaft and decelerator passes through chain sprocket structure transmission chain connect.
It is preferred that, the frame sets upper cantilever and lower cantalever close to one end of advance system, and one end of upper cantilever hangs with lower One end of arm is fixedly connected, and the other end and the car body of lower cantalever are hinged, and the other end of upper cantilever is hinged on hydraulic cylinder Telescopic end, cylinder cylinder body and the car body of hydraulic cylinder are hinged.
It is preferred that, the upper cantilever is L-shaped, and the lower cantalever is fixed on upper cantilever close to one end of frame, on car body Provided with the boss for being hinged with lower cantalever.
Beneficial effect
The present invention is provided with garlic bar removal mechanism before digger blade, and spiral is thrown into after garlic bar can be cut off by the cutter on cutter shaft In conveyer, garlic bar is dished out in column in garlic Tanaka by conveying worm, is easy to the collection to garlic bar to reprocess, reduces labor The mechanical breakdown that fatigue resistance and the winding of garlic bar are brought.
The present invention's goes native device to include two-stage flase floor, and one piece of flase floor is used for the most of soil that will be taken out of by digger blade Soil is returned to, another piece of flase floor can coordinate with the hack element on ribbon conveyer, by hack element by garlic and the lattice Grid kneading friction on screen, the attachment soil on garlic is removed and returning to the field, go native process by way of simulation of human body It is not easy to cause fresh garlic damage, compared with the garlic digging harvester of the prior art, the significantly more efficient garlic that maintains Edibility and economic value.The present invention's goes native apparatus structure simple, it is easy to accomplish, and interference will not be caused to miscellaneous part Or insignificant vibrations, it can make digger blade that there is longer service life, so as to ensure that the present invention's is efficient, stably, persistently Operation.
Brief description of the drawings
Fig. 1 is structural representation of the invention;
Fig. 2 is the sectional view of the cutter shaft part of the present invention;
Marked in figure:1st, frame, 2, gauge wheel, 3, garlic bar device for excising, 301, cutter shaft, 302, conveying worm, 303, cutter, 304th, guide plate, 4, digger blade, 5, Qu Tu mechanisms, the 501, first flase floor, the 502, second flase floor, 503, ribbon conveyer, 506th, hack element, 6, harvest case, 601, sliding native plate, 7, car body, 8, engine, 9, decelerator, 10, Athey wheel, 11, middle Axle, 12, upper cantilever, 13, lower cantalever, 14, hydraulic cylinder.
Embodiment
As shown in Figures 1 and 2, a kind of garlic digging harvester of the invention, including harvest operation system and promotion harvest are made The advance system that industry system is advanced, completes during traveling that Garlic bar is cut, garlic bar is neatly dished out by harvest operation system, Garlic is excavated, garlic adheres to soil and removes, adheres to the job content such as native returning to the field and garlic collection.
The harvest operation system of the present invention includes frame 1, and one end of frame 1 is connected with advance system, and the other end is provided with limit Deep wheel 2, garlic bar excision mechanism 3, digger blade 4, Qu Tu mechanisms 5 are sequentially provided with frame 1 by gauge wheel 2 to advance system direction And harvest case 6.Gauge wheel 2 is both used as ground-wheel, enables thrust of the harvest operation system by advance system Advanced in garlic Tanaka, the inclination angle between frame 1 and ground can be adjusted by the height regulation of gauge wheel 2 again, so that according to Depth and garlic bar excision mechanism 3 that the depth of garlic Tanaka's garlic and the height adjustment digger blade 4 of garlic bar are shoveled in field The height at chipping position.
Garlic bar excision mechanism 3 is included perpendicular to direct of travel of the present invention and cutter shaft 301 arranged in parallel and spiral transferring Send machine 302.The two ends of cutter shaft 301 and the main shaft of conveying worm 302 are rotatably provided in the bearing on the side plate of frame 1 respectively In seat.The cross section of cutter shaft 301 in the present embodiment is square, or other regular polygons, in the every of cutter shaft 301 Length direction laminating on one side along cutter shaft 301 is provided with cutter 303, and the blade of all cutteves 303 is sequentially arranged The outside of corresponding side surface, four paddle-shapeds that cutter 303 is formed can be cut off garlic bar by the rotation of cutter shaft 301, and will be cut The garlic bar having no progeny is thrown on conveying worm 302.Offered vertically in the housing upper of conveying worm 302 for receiving garlic The opening of bar, enters conveying worm 302 by the opening to be further ensured that garlic bar is accurate, auxiliary has been provided with the opening The guide plate 304 of the circular arc of effect.Garlic bar enter conveying worm 302 after, by its main shaft spiral vane it is defeated Send and discharged by its discharging opening, the conveying end for being located at conveying worm 302 in the side plate of frame 1, which is provided with, to be used to shed garlic bar to ground Opening on face.This garlic bar excision mechanism 3 can in the present invention continues traveling process by garlic bar in column neat throwing big Garlic Tanaka, is easy to later collection and focuses on, save manpower and materials., also can be in machine in order to further be easy to garlic bar to collect The garlic bar collection feed bin that opening is connected on frame 1 is together advanced with harvest operation system.
Digger blade 4, which is tilted, is fixed on the bottom of frame 1 and vertical with the direct of travel holding of the present invention, digger blade 4 and ground Between angle be maintained at 10 ° -30 °, for inserting underground in traveling process of the present invention, and will with the lasting traveling of the present invention Garlic and attachment soil are oriented to the rear of digger blade 4 along the upper surface of digger blade 4.
Qu Tu mechanisms 5 are arranged on the rear of digger blade 4, are separated for receiving garlic and attachment soil, and by attachment soil with garlic With returning to the field, it includes the first flase floor 501 that is being connected with the rear end of digger blade 4 and being obliquely installed from the front to the back, is connected to Second flase floor 502 of the rear end of one flase floor 501 and the belt being arranged in frame 1 positioned at the top of the second flase floor 502 are defeated Send machine 503.Grid direction on first flase floor 501 is parallel with the excavation direction of digger blade, and its grid distance is arranged on 20- 30mm, its inclination angle is identical with digger blade 4.Grid direction on second flase floor 502 with it is perpendicular with the excavation direction of digger blade, Its grid distance is arranged on 15-20mm, and its inclination angle is slightly larger than the inclination angle of digger blade 4.The conveying direction of ribbon conveyer 503 and second The keeping parallelism of flase floor 502 and on the conveyor belt be provided be used for on the second flase floor 502 grid coordinate will be attached on garlic Soil and rub hack element 504 that is broken and being fallen on the second flase floor 502.In the present invention persistently traveling operation process, dug The garlics that dig out of pick shovel 4 and attachment soil first pass around the first flase floor 501, and most loose attachment soil can be by the The larger grid of spacing falls returning to the field on one Turbogrid plates.It is attached with the soil of a small amount of garlic and bulk for being tightly combined attachment soil Into on the second flase floor 502, and towards the conveying of the rear end of the second flase floor 502 under the toggle action of hack element 504, defeated During sending, the stirring and being rubbed with the grid generation on the second flase floor 502 by hack unit of garlic and bulk soil, Relatively close attachment soil will be combined on garlic to smash and fall into ground returning to the field by grid gap.Hack element in the present embodiment 504 be many fixed finger-type rubber bars on the conveyor belt in interval.Spacing between the end of rubber bar and the second Turbogrid plates is set Put in 10mm or so, can be by the means of simulation of human body, before mechanical damage is not caused to garlic less than the diameter of garlic Put, it is efficient to remove the attachment soil combined closely on garlic.The setting of many rubber bars, can make the garlic with attachment soil exist Between many rubber slabs of motion following motion mode is produced between fixed second flase floor 502:Garlic is by one Rubber bar stirs generation upset, and the grid of second flase floor of side 502 mutually rubs, and native fragmentation is adhered to by grid also in part Field;What garlic departed from the rubber bar stirs control, keeps geo-stationary motionless with the second flase floor, with ribbon conveyer 503 Persistent movement, there is next rubber bar to move to the garlic soon, make garlic another sideways with the second flase floor 502 Friction, by repeatedly rubbing repeatedly, plays and good goes native effect.And because rubber bar has good elasticity and toughness concurrently, no Mechanical damage can be caused to fresh garlic, and it is wear-resisting be unlikely to deform, the present invention can be kept to make long lasting for stable operation Industry.
Harvest case 6 is arranged on the lower section for being located at the second flase floor 502 in frame 1, and harvest case 6 is used for the opening for receiving garlic Positioned at the end of the conveying direction of ribbon conveyer 503.Harvest one block of side plate inclination that case 6 is located at immediately below the second flase floor 502 Set, and form the sliding native plate 601 that bottom surface is slided to for the hack fallen on the second flase floor 502.
The advance system of the present invention includes car body 7, and engine 8 and corresponding decelerator 9 are provided with the top of car body 7, The lower section of car body 7 is provided with the Athey wheel 10 and crawler belt driven by engine 8.Cutter shaft 301, conveying worm 302 and belt Conveyer 503 is driven by a jackshaft being arranged in frame 1 11 by chain sprocket structure, and jackshaft 11 is by decelerator 9 Output shaft is driven by chain sprocket structure.Driving system structure is simple, rationally distributed and non-interference, is by an engine 8 All moving components of the present invention can be driven, the input cost of energy loss and the present invention is reduced.
The harvest operation system of the present invention is connected with advance system by two cantilevers.In the frame 1 of harvest operation system Upper one end close to advance system is fixedly connected with upper cantilever 12 and lower cantalever 13, and the other end and the car body 7 of lower cantalever 13 are mutually cut with scissors Connect, the other end of upper cantilever 12 is hinged on the telescopic end of a hydraulic cylinder 14, cylinder body and the car body 7 of hydraulic cylinder 14 are hinged.On Cantilever is L-shaped, lower cantalever is fixed on upper cantilever close to one end of frame, be provided with car body with for being hinged with lower cantalever Boss.The inclination angle between frame 1 and ground can be adjusted by adjusting the stroke of the telescopic end of hydraulic cylinder 14, so that according to big The depth and garlic bar excision mechanism 3 that the depth of garlic Tanaka's garlic and the height adjustment digger blade 4 of garlic bar are shoveled in field are cut The height of bar portion position.

Claims (10)

1. a kind of garlic digging harvester, it is characterised in that:Including harvest operation system and the row for promoting harvest operation system to advance Enter system, harvest operation system includes frame(1), frame(1)One end be connected with advance system, the other end be provided with gauge wheel (2), in frame(1)On by gauge wheel(2)Garlic bar excision mechanism is sequentially provided with to advance system direction(3), digger blade(4), go Native mechanism(5)And harvest case(6).
2. a kind of garlic digging harvester according to claim 1, it is characterised in that:The garlic bar cuts off mechanism(3)Including flat The cutter shaft that row is set(301)And conveying worm(302), in cutter shaft(301)On be arranged at intervals with many handles be used for pass through cutter shaft (301)Garlic bar is cut off and the garlic bar of cut-out is thrown into conveying worm by rotation(302)Cutter(303), the helical feed Machine(302)Housing upper offer opening for receiving garlic bar vertically and for aiding in garlic bar to enter leading for the opening To plate(304), in frame(1)It is upper to be located at conveying worm(302)Conveying end be provided be used for garlic bar is shed to ground Opening.
3. a kind of garlic digging harvester according to claim 2, it is characterised in that:The cutter shaft(301)Cross section for just Polygon, in cutter shaft(301)Each side it is upper along cutter shaft(301)Length direction laminating be provided with cutter(303), institute There is cutter(303)Blade and cutter shaft(301)Axis it is parallel, and cut direction is along cutter shaft(301)It is circumferential in the same direction Set.
4. a kind of garlic digging harvester according to claim 2, it is characterised in that:The digger blade(4)Inclination is fixed on machine Frame(1)Bottom, the Qu Tu mechanisms(5)Including being connected to digger blade in turn along harvest machine operation direct of travel(4)Rear and from Before tilt backwards the first flase floor of setting(501)And second flase floor(502), the first flase floor(501)On grid side To digger blade(4)Excavation direction it is parallel, the second flase floor(502)On grid direction and digger blade(4)Excavation direction It is perpendicular, in frame(1)It is upper to be located at the second flase floor(502)Top be provided with parallel to the second flase floor(502)Belt it is defeated Send machine(503), ribbon conveyer(503)Conveyer belt be provided be used for and the second flase floor(502)On grid coordinate garlic Attachment soil on head rubs broken and by the second flase floor(502)On the hack element that falls(504).
5. a kind of garlic digging harvester according to claim 4, it is characterised in that:The hack element(504)Between many Every fixed finger-type rubber bar on the conveyor belt.
6. a kind of garlic digging harvester according to claim 4, it is characterised in that:The harvest case(6)It is arranged on frame(1) It is upper to be located at the second flase floor(502)Lower section, harvest case(6)Opening for receiving garlic is located at ribbon conveyer(503)It is defeated Send the end in direction;Harvest case(6)Positioned at the second flase floor(502)One block of side plate of underface is obliquely installed, and is formed and supplied Two flase floors(502)On the hack that falls slide to the sliding native plate of bottom surface(601).
7. a kind of garlic digging harvester according to claim 4, it is characterised in that:Advance system includes car body(7), in car body (7)Top is provided with engine(8)And and engine(8)The decelerator of connection(9), in car body(7)Lower section is provided with and decelerator (9)The Athey wheel connected by transmission belt(10).
8. a kind of garlic digging harvester according to claim 7, it is characterised in that:The cutter shaft(301), conveying worm (302)And ribbon conveyer(503)Frame is arranged on by one(1)On jackshaft(11)Driven by chain sprocket structure, The jackshaft(11)With decelerator(9)Output shaft pass through chain sprocket structure transmission chain connect.
9. a kind of garlic digging harvester according to claim 7, it is characterised in that:The frame(1)Close to advance system One end sets upper cantilever(12)And lower cantalever(13), upper cantilever(12)One end and lower cantalever(13)One end be fixedly connected, it is lower outstanding Arm(13)The other end and car body(7)It is hinged, upper cantilever(12)The other end be hinged on a hydraulic cylinder(14)Telescopic end, Hydraulic cylinder(14)Cylinder cylinder body and car body(7)It is hinged.
10. a kind of garlic digging harvester according to claim 9, it is characterised in that:The upper cantilever(12)It is described for L-shaped Lower cantalever(13)It is fixed on upper cantilever(12)Close to frame(1)One end, in car body(7)It is provided with and is used for and lower cantalever(13) The boss being hinged.
CN201710575406.6A 2017-07-14 2017-07-14 A kind of garlic digging harvester Pending CN107251701A (en)

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Application Number Priority Date Filing Date Title
CN201710575406.6A CN107251701A (en) 2017-07-14 2017-07-14 A kind of garlic digging harvester

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Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN108702914A (en) * 2018-07-03 2018-10-26 北方民族大学 A kind of radix pseudostellariae excavation collection device
JP2019110855A (en) * 2017-12-25 2019-07-11 株式会社クボタ Crop harvester
JP2019110857A (en) * 2017-12-25 2019-07-11 株式会社クボタ Crop harvester
CN113973675A (en) * 2021-10-27 2022-01-28 湖南省棉花科学研究所 Novel method for cultivating allium chinense
CN115413469A (en) * 2022-10-26 2022-12-02 鲁东大学 Support, receive, cut, field full process garlic harvester of integration

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CN106941854A (en) * 2017-05-05 2017-07-14 山东省玛丽亚农业机械有限公司 A kind of caterpillar band self-propelled garlic digging harvester
CN206923289U (en) * 2017-07-14 2018-01-26 河南科技大学 A kind of garlic digging harvester

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CN101233802A (en) * 2008-02-29 2008-08-06 杨士俊 Tomato digging harvester
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CN206923289U (en) * 2017-07-14 2018-01-26 河南科技大学 A kind of garlic digging harvester

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2019110855A (en) * 2017-12-25 2019-07-11 株式会社クボタ Crop harvester
JP2019110857A (en) * 2017-12-25 2019-07-11 株式会社クボタ Crop harvester
CN108702914A (en) * 2018-07-03 2018-10-26 北方民族大学 A kind of radix pseudostellariae excavation collection device
CN113973675A (en) * 2021-10-27 2022-01-28 湖南省棉花科学研究所 Novel method for cultivating allium chinense
CN115413469A (en) * 2022-10-26 2022-12-02 鲁东大学 Support, receive, cut, field full process garlic harvester of integration
CN115413469B (en) * 2022-10-26 2023-06-20 鲁东大学 Whole-process garlic harvester integrating holding, harvesting, cutting and returning to field

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