In the 1930s, after the appointment of Henry J. Anslinger as the commissioner of the newly-established Narcotics Bureau, hemp cannabis was declared a narcotic and hemp farming was banned in the USA.
Ngemnyaka wa 1930, ngemuva kwekuhlangana kwa Henry J. Anslinger njengakhomishana we kusungulwa lokusha kwe Narcotics Bureau, icannabis ye hemp kwatsiwa yi narcotic kantsi nekulima ihemp kwavalwa eUSA.