Cholimira chakutsogolo, manambala a zigawo 073250 ndi 073251, makina a zaulimi.
Mapulawo akutsogolo 073250 ndi 073251 ndi zinthu zofunika kwambiri, zosavuta kuvala mu makina olima ulimi, makamaka mapulawo a moldboard ndi mapulawo osinthika mwachangu. Monga gawo lofunika kwambiri pakupanga pulawo, mndandanda wa mapulawo akutsogolo nthawi zambiri umagwira ntchito limodzi ndi mzere wakumbuyo wa pulawo, pulawo, ndi pulawo kuti udule, uswe, ndikutembenuza nthaka. Mitundu iwiriyi ili ndi kapangidwe kogawanika, kopangidwa kuti kagwirizane ndi ndalama zambiri zosinthira komanso kukonza kosasangalatsa komwe kumagwirizanitsidwa ndi mapulawo achikhalidwe amodzi akawonongeka pang'ono. Ndi oyenera makamaka kulima mwachangu komanso malo ovuta kugwira ntchito m'nthaka youma.
Mapulawo akutsogolo 073250 ndi 073251, omwe ali pamwamba ndi kumbuyo kwa pulawo, ndi madera akuluakulu omwe amakhudzidwa kwambiri ndi kukangana ndi kugundana kwa nthaka. Ntchito zawo zazikulu ndi izi:
Kuthandiza kulowa ndi kuswa nthaka: Pogwira ntchito limodzi ndi pulawo, amakanikiza ndikuswa mabundu odulidwa ndi pulawo, kuchepetsa ntchito pazigawo zina.
Kutembenuza ndi kuphimba: Kudzera pamalo enaake opindika, amakweza bwino nthaka yosweka, zomwe zimapangitsa kuti nthaka iphimbidwe mozama ndi udzu, udzu, ndi feteleza, zomwe zimapangitsa kuti nthaka ikhale yolimba.
Kapangidwe ka modular kogawanika: Kamagwiritsa ntchito mabotolo ozungulira kuti akonze pulawo (kapena mzati wa pulawo) kuti zikhale zosavuta kusonkhanitsa ndi kumasula. Popeza pulawo yakutsogolo imawonongeka mofulumira kuposa pulawo yakumbuyo panthawi yolima, kapangidwe kameneka kamalola ogwiritsa ntchito kusintha pulawo yakutsogolo yokha yomwe yawonongeka kwambiri (monga 073250 kapena 073251) pomwe akusunga pulawo yakumbuyo yomwe ili bwino komanso zinthu zina, motero amachepetsa kwambiri ndalama zokonzera ndi nthawi yopuma.
Kuti athane ndi kusweka kwa nthaka kwambiri komanso malo ovuta kupsinjika, ma pulawo akutsogolo a mitundu 073250 ndi 073251 nthawi zambiri amapangidwa pogwiritsa ntchito zipangizo zolimba kwambiri, zolimba kwambiri, komanso zolimba bwino. Mogwirizana ndi ukadaulo wamakono wamakina aulimi, zigawozi nthawi zambiri zimapangidwa ndi chitsulo chapamwamba kwambiri (monga chitsulo cha manganese cha 65Mn) kudzera mu kutentha kapena njira zolimbitsa pamwamba kuti zitsimikizire kuti ntchitoyo ikhala yayitali. Mapangidwe ena apamwamba angaphatikizeponso zipangizo zamaginito kapena kukonza malo apadera (monga masamba a shin opindika) kuti achepetse kukana kulima, kuchepetsa kugwiritsa ntchito mafuta, komanso kukonza magwiridwe antchito oponya nthaka pansi pa ntchito yothamanga kwambiri.
Mapulawo a kutsogolo awa amagwiritsidwa ntchito kwambiri pa mapulawo a bolodi lopangidwa ndi moldboard, mapulawo osinthika mwachangu, ndi zida zina zokhala ndi mathirakitala akuluakulu ndi apakatikati. Kaya amagwiritsidwa ntchito polima mozama nthawi yophukira, kulima masika, kapena kuchotsa zinyalala m'nthaka yolemera ya dongo, nthaka yakuda, kapena minda youma, mitundu ya 073250 ndi 073251, yokhala ndi kapangidwe kake kabwino kwambiri kopindika, imatsimikizira kuti imatha kusunthika bwino komanso kuti ikule bwino, zomwe zimapangitsa kuti ikhale zida zabwino kwambiri zosinthira kuti "kulima kosungirako" komanso ulimi wothandiza kwambiri.
