Assertion: salt's potassium | /r/HasProperty | needed
Facets:
value: for plants
type: PURPOSE
Source sentences:
text: Potassium and sodium are both electrolytes that are needed for your body to function normally.
text: The discovery by Justus Liebig in 1840 that potassium is a necessary element for plants and that most types of soil lack potassium caused a steep rise in demand for potassium salts.
text: Helps the body to absorb potassium which is needed for your nerves and muscles to work.