Assertion: ammonia | /r/HasProperty | necessary
Facets:
value: for plant growth
type: PURPOSE
Source sentences:
text: it is necessary for the fishkeeper to add some steady source of ammonia to feed the growing bacteria colonies.
text: This is because ammonia is a common and cheap source of nitrogen, which is a necessary mineral for plant growth.
text: Ammonia is essential for mammals and is necessary for making DNA, RNA, and proteins.