Rubuta ci gaba don wannan sakin layi - Arewacin Dakota a Amurka ya kasance wurin da ake samar da tukwane na zamani ta amfani da yumbu na Arewacin Dakota tun farkon 1900s. A shekara ta 1892 wani binciken da Earle Babcock, malamin ilmin sunadarai a Jami'ar North Dakota (UND) ya wallafa ya ba da rahoto game da ingancin wasu yumɓu na North Dakota don samar da tukwane. Makarantar Ma'adinai ta UND ta fara aiki a 1898 tare da Earle Babcock a matsayin darektan. Da taimakon masu yin tukwane da yawa na gabas, an fara nuna tukwane da aka yi da yumɓu na Dakota ta Arewa a bikin baje kolin duniya na St. Louis a shekara ta 1904
Ka yi haƙuri.