Assertion: phosphate's amount | /r/HasProperty | practical
Facets:
value: for the circumstance
type: CAUSE
Source sentences:
text: Generally it is desirable to employ the least amount of inert and/or active tracer(s) that is practical for the circumstance, and the amount of the inert and/or active tracer(s) added to the water of the boiler system should be at least an amount effective for the determinations desired.