Assertion: fertilizer | /r/HasProperty | based on ammonium phosphate
Facets:
value: in 1931
type: TEMPORAL
Source sentences:
text: The interwar period saw innovative competition from Imperial Chemical Industries who developed synthetic ammonium sulfate in 1923, Nitro-chalk in 1927, and a more concentrated and economical fertilizer called CCF (Concentrated Complete Fertiliser) based on ammonium phosphate in 1931.