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Urea
Lemandou urea nrog 46 feem pua nitrogen cov ntsiab lus, yog qhov khoom lag luam nitrogen chiv zoo. Urea chiv siv dav hauv kev ua liaj ua teb. Nws yog daim ntawv tshaj plaws ntawm nitrogen fertilizer siv thoob ntiaj teb. Lawv suav tias yog qhov khoom lag luam nitrogen. Ua los ntawm ammonia thiab carbon dioxide, nws muaj cov ntsiab lus siab tshaj plaws ntawm ib qho ntawm cov khoom ntim nitrogen. Ua cov khoom lag luam, urea tuaj yeem siv ncaj qha rau cov av uas siv cov khoom siv sib kis tau yooj yim. Ntxiv nrog rau av thov, urea chiv kuj tseem siv tau hauv fertigation lossis ua daim ntawv thov foliar. Txawm li cas los xij, kev siv tshuaj urea yuav tsum tsis txhob siv cov av kab lis kev cai tsawg dua, vim tias urea yuav tso tawm tam sim ntawd tawm ntawm cov thawv.
