Among the new chemicals for killing weeds which appeared on the market in 1940 and 1941 when war needs began to make it increasingly difficult to get sodium chlorate and Atlacide, was Ammate (the name is a contraction of its real chemical name —ammonium sulfate).
Sylwester, E. P.
"New Chemicals for Weeds,"
Farm Science Reporter: Vol. 5
, Article 4.
Available at: http://lib.dr.iastate.edu/farmsciencereporter/vol5/iss4/4