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Urea
Lemandou urea tare da kashi 46 cikin ɗari na sinadarin nitrogen, ingantaccen samfurin takin nitrogen ne. Ana amfani da takin Urea sosai a harkar noma. Wannan shine nau'ikan takin nitrogen wanda ake amfani dashi a duniya. Ana ɗaukarsu tushen asalin nitrogen na tattalin arziki. Samuwa daga ammoniya da carbon dioxide, yana da mafi girman abun cikin nitrogen na kowane taki mai narkewar nitrogen. A matsayin kayan amfanin gona, ana iya amfani da urea kai tsaye zuwa kasar gona ta hanyar amfani da kayan yada al'ada. Baya ga aikace-aikacen ƙasa, ana iya amfani da takin takin urea a cikin haihuwa ko azaman aikace-aikacen foliar. Koyaya, bai kamata ayi amfani da takin urea cikin ƙarancin al'adun ƙasa ba, saboda urea nan take zai fita daga cikin akwatin.
