Assertion: calcium nitrate | /r/HasProperty | converted to potassium nitrate
Facets:
value: by filtering through potash
type: MANNER
Source sentences:
text: The heap was usually under a cover from the rain, kept moist with urine, turned often to accelerate the decomposition, then finally leached with water after approximately one year, to remove the soluble calcium nitrate which was then converted to potassium nitrate by filtering through potash.