Ukuboza 28, 2020 Raporo ya buri cyumweru Urea

Noneho inzira nyamukuru yuruganda rwa urea mukarere ka shandong 1810 (toni yigiciro, kimwe na nyuma), agace ka linyi uruganda rwifumbire mvaruganda kuri urea kubiciro 1810-1820, akarere ka hebei ka urea ibiciro byahoze ari uruganda ni 1830, bitanga ituze ryigihe gito, imbaraga za kare gutumiza ntugire, kandi utange umwanya wambere kumanuka kuruhande, gucuruza ibintu bibiri byoroheje, gufunga gato, ibigo bitangira kuguma bihamye, Kubera itangwa rya peripheri iheruka ni bike, ibivugwa muruganda byibuze bihamye; urea mu gace ka Henan ni 1810-1820, naho amagambo yongeweho ho gato. Agace ka Shanxi kariya gace ka urea kavukire 1740, 1780 nuduce twinshi.Ibicuruzwa byo mu rwego rwo hejuru bivuga 1890. Imikorere isabwa ku masoko akikije ni rusange, gusa inganda zikenerwa mu nganda gufata ibicuruzwa, ariko umubare w’ibarura ry’inganda nyinshi ni nto, bityo amagambo ashobora gutekerezwa byibuze byibuze.Akarere kaJiangsu urea nyamukuru uruganda rwavuzwe 1940.