Assertion: fertilizer | /r/MadeOf | urea
Facets:
value: as a nitrogen source
type: MANNER
value: as a starter
type: MANNER
Source sentences:
text: Use caution with fertilizers which contain urea as a starter
text: These inhibitors can reduce N loss from leaching and denitrification but are only effective on fertilizers that either contain or are converted to ammonium, including anhydrous ammonia, urea, and ammonium sulfate.
text: Some fertilizers, like 20-20-20, contain urea as a nitrogen source.