M'minda yayikulu ya Central Valley ku California, kusintha kwa ulimi komwe kumachitika chifukwa cha ukadaulo kukuchitika mwakachetechete. Famu yayikulu yakomweko, Golden Harvest Farms, posachedwapa yayambitsa ukadaulo wa RS485 wowunikira nthaka kuti iwunikire zambiri zofunika monga chinyezi cha nthaka, kutentha ndi mchere nthawi yeniyeni, motero kukwaniritsa kuthirira kolondola komanso kusunga madzi moyenera.
Chigwa chapakati cha California ndi chimodzi mwa madera ofunikira kwambiri pa ulimi ku United States, koma chilala ndi kusowa kwa madzi m'zaka zaposachedwa kwabweretsa mavuto akulu pa ulimi wakomweko. Golden Harvest Farm imalima mbewu zosiyanasiyana zamtengo wapatali, kuphatikizapo amondi, mphesa ndi tomato. Poyankha vuto la kuchepa kwa madzi, alimi adaganiza zogwiritsa ntchito ukadaulo wa RS485 wodziwa nthaka kuti akonze bwino kayendetsedwe ka ulimi wothirira ndikuchepetsa kutaya madzi.
Sensa ya nthaka ya RS485 ndi sensa yolondola kwambiri yochokera pa njira yolumikizirana ya RS485 yomwe imatha kusonkhanitsa deta ya nthaka nthawi yeniyeni ndikuitumiza ku dongosolo lolamulira lapakati kudzera pa netiweki ya waya. Alimi amatha kuwona momwe nthaka ilili patali kudzera pa mafoni am'manja kapena makompyuta, ndikusintha mapulani othirira kutengera deta kuti atsimikizire kuti mbewu zikula bwino.
Michael Johnson, woyang'anira ntchito za Golden Harvest Farm, anati: “Ma sensor a nthaka a RS485 asintha kwambiri momwe timathirira. Kale, tinkangodziwa nthawi yothirira potengera zomwe takumana nazo, koma tsopano tikudziwa bwino kuchuluka kwa madzi omwe nthaka iliyonse ikufuna. Izi sizimangopulumutsa madzi ambiri, komanso zimawonjezera zokolola ndi ubwino wa mbewu.”
Malinga ndi deta ya m'minda, mutagwiritsa ntchito zoyezera nthaka za RS485, kugwiritsa ntchito madzi othirira kwachepetsedwa ndi 30%, zokolola za mbewu zawonjezeka ndi 15%, ndipo mchere wa nthaka walamulidwa bwino, kupewa kuwonongeka kwa nthaka komwe kumachitika chifukwa cha kuthirira mopitirira muyeso.
Akatswiri a zaulimi ku yunivesite ya California, Davis, amazindikira izi kwambiri. Lisa Brown, pulofesa ku Sukulu ya Sayansi ya Zaulimi ndi Zachilengedwe ku yunivesiteyi, anati: “Zida zoyezera nthaka za RS485 ndi chida chofunikira kwambiri pa ulimi wolondola. Zingathandize alimi kugwiritsa ntchito bwino madzi m'malo ouma komanso kukonza ulimi wokhazikika. Izi ndizofunikira kwambiri paulimi ku California komanso padziko lonse lapansi.”
Kupambana kwa Golden Harvest Farm kukukulitsidwa mwachangu ku California ndi mayiko ena a ulimi. Alimi ambiri akuyamba kulabadira ndikugwiritsa ntchito ukadaulo wa RS485 wodziwa nthaka kuti athe kuthana ndi mavuto omwe akuchulukirachulukira okhudzana ndi madzi.
"Sensa ya nthaka ya RS485 sikuti imatithandiza kusunga ndalama zokha, komanso imatithandiza kuteteza chilengedwe bwino," Johnson adawonjezera. "Tikukhulupirira kuti ukadaulo uwu udzakhala maziko a chitukuko cha ulimi mtsogolo."
Zokhudza sensa ya nthaka ya RS485:
Sensa ya nthaka ya RS485 ndi sensa yolondola kwambiri yochokera ku njira yolumikizirana ya RS485 yomwe imatha kuyang'anira deta yofunika monga chinyezi cha nthaka, kutentha ndi mchere nthawi yeniyeni.
Sensa ya nthaka ya RS485 imatumiza deta ku dongosolo lolamulira lapakati kudzera mu netiweki yolumikizidwa ndi waya, zomwe zimathandiza ogwiritsa ntchito kupeza ulimi wothirira molondola komanso kusunga madzi moyenera.
Chojambulira nthaka cha RS485 ndi choyenera pazochitika zosiyanasiyana monga ulimi wa m'munda, kubzala zomera zobiriwira, kusamalira minda ya zipatso, ndipo chimagwira ntchito bwino kwambiri m'malo ouma.
Zokhudza ulimi waku America:
Dziko la United States ndi dziko lomwe limapanga ndi kutumiza zinthu zaulimi zambiri padziko lonse lapansi, ndipo ulimi ndi chimodzi mwa zinthu zofunika kwambiri pazachuma.
Chigwa chapakati cha California ndi dera lofunika kwambiri pa ulimi ku United States, lodziwika bwino chifukwa cholima mbewu zamtengo wapatali monga amondi, mphesa, ndi tomato.
Ulimi waku America umayang'ana kwambiri pa zatsopano za sayansi ndi ukadaulo ndipo umagwiritsa ntchito ukadaulo wolondola waulimi kuti uwonjezere kugwiritsa ntchito bwino zinthu komanso kugwiritsa ntchito bwino zinthu.
Nthawi yotumizira: Feb-24-2025