Leej twg invented lub caij nplooj ntoos hlav hniav harrow?
Leej twg invented lub caij nplooj ntoos hlav hniav harrow?

Video: Leej twg invented lub caij nplooj ntoos hlav hniav harrow?

Video: Leej twg invented lub caij nplooj ntoos hlav hniav harrow?
Video: peb yog leej twg 2024, Kaum ib hlis
Anonim

Xyoo 1869 David L. Garver ntawm Michigan patented a caij nplooj ntoos hlav hniav harrow.

Kuj nug yog, leej twg invented lub disc harrow?

Xyoo 1837 los ntawm tag nrho cov hlau plooj invented John Deere. Cov hlau ploj tshem cov av zoo dua li cov hlau cam khwb cia ploj thiab tsis tshua muaj kev nyiam tawg thaum nws tsoo pob zeb. Nyob rau xyoo 1870 muaj kev caij tsheb zoo ploj , hu ua sulky ploj , tau tsim.

Lub caij nplooj ntoos hlav hniav siv rau dab tsi? A caij nplooj ntoos hlav - hniav harrow, qee zaum hu ua drag harrow, yog ib hom harrow, thiab tshwj xeeb yog hom tine harrow. Ib tug luag harrow tshwj xeeb tshaj yog hais txog ib hom kev cog qoob loo loj heev uas yog siv rau smooth lub hauv av thiab loosen nws tom qab nws tau plowed thiab ntim.

Ntawm no, thaum twg lub disc harrow tau tsim?

Txhua yam hlau siv nrog clamped ntawm hlau hniav tau qhia nyob rau hauv thaum ntxov 1800s. Caij nplooj ntoos hlav hniav luas tuaj nyob rau hauv lub lag luam nyob rau hauv 1877. Disk harrows hauv 1880's. Cov disk harrow yog siv los do hauv av mus rau qhov tob tob.

Dab tsi yog spike tooth harrow?

npe. a siv nruab nrog ncaj cov hniav ntawm kab rov tav bar, feem ntau yog ua hauj lwm kom du thiab theem plowed av los yog seedbeds rau cog los yog sowing.

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