Their efficacy may not have been scientifically tested to the same degree as the drugs listed in the table above. However there may be historical, cultural or anecdotal evidence linking their use to the treatment of Anxiety and Stress.
During the Great Leap Forward, farming was organized into communes and the cultivation of private plots forbidden. Iron and steel production was identified as a key requirement for economic advancement. Millions of peasants were ordered away from agricultural work to join the iron and steel production workforce.
The steel plow of 1837, developed by John Deere, was an invention that contributed greatly to the agricultural world. It allowed farmers to cultivate crops more efficiently because the smooth texture of the steel blade would not allow the soil of the Great Plains to stick as the cast iron plow did.