Assertion: nitrogen's form | /r/HasProperty | ammonium
Facets:
value: usually
type: DEGREE
Source sentences:
text: Bacteria like Rhizobium, or the actinomycete Frankia which nodulates members of the plant families Rosaceae and Betulaceae, utilize atmospheric nitrogen and convert it to an inorganic form (usually ammonium, NH 4 +) that plants can use.