Forage harvester qhov chaw yog lub hauv paus tseem ceeb rau kev ua haujlwm zoo ntawm tag nrho lub tshuab. Los ntawm lub taub hau, chopping nruas thiab pub cov menyuam mus rau qhov kev sib kis, cov khoom siv hydraulic, cov hniav thiab cov ntaub thaiv npog, txhua qhov ncaj qha txiav txim siab ua haujlwm tau zoo, kev sau qoob loo thiab kev pabcuam lub neej ntawm cov khoom siv. Cov khoom siv zoo tshaj plaws yog ua los ntawm cov khoom siv muaj zog hnav-tiv taus, uas tuaj yeem hloov mus rau lub sijhawm ua haujlwm tsis tu ncua, txo qis hnav, tawg thiab poob qis, ua kom cov straw txiav kom zoo, tsis tu ncua ntev ntev thiab du tawm, thiab ua tau raws li cov qauv siab ntawm cov tsiaj txhu thiab silage ntau lawm.

Hauv kev ua haujlwm, cov tub ntxhais hnav cov khoom xws li txav cov hniav, cov hniav ruaj khov, cov kabmob, cov hlua khi thiab cov kav dej hydraulic yuav tsum tau kuaj xyuas, tu thiab hloov. Cov khoom siv txhim khu kev qha tsis tsuas yog txhim kho kev ruaj ntseg ntawm tag nrho lub tshuab, tab sis kuj txo cov nqi txij nkawm thiab ncua kev pab cuam lub neej ntawm cov cuab yeej siv. Txawm hais tias nws yog cov khoom qub lossis cov khoom siv zoo tshaj plaws, xaiv qhov tsim nyog, ruaj khov thiab ruaj khov forage harvester qhov chaw tuaj yeem ua kom cov cuab yeej ua haujlwm zoo thaum lub caij sau qoob loo, ua tiav kev ua haujlwm tau zoo, qis-tsawg thiab ruaj khov, thiab muab kev lav zoo rau kev ua liaj ua teb niaj hnub thiab tsiaj txhu.