Assertion: potassium nitrate | /r/HasProperty | deemed valuable
Facets:
Source sentences:
text: This paving practice spread to such an extent, and the saltpetre was deemed so valuable, that sovereigns in both Sweden and England took measures to make it illegal.
text: It is apparent from these facts that potassium nitrate is a valuable fertilizer; however, heretofore a low-cost process for producing potassium nitrate has not been available.
text: “The flagship of our potash industry will produce potassium nitrate, a valuable raw material for the production of complex mineral fertilizers.