Assertion: fertilizer's potash | /r/HasProperty | sop
Facets:
Source sentences:
text: K2SO4 or sulfate of potash (SOP)] and potassium nitrate (KNO3 or saltpeter).
text: The two main types of potash are muriate of potash (MOP, potassium chloride) and sulphate of potash (SOP, potassium sulphate).