Assertion: urea's nitrogen | /r/HasProperty | content
Facets:
value: often
type: TEMPORAL
Source sentences:
text: In point of fact, urea is the most widely used nitrogen fertilizer in most parts of east Africa because of its high nitrogen (N) content (46%) and comparatively low cost of production; however, due to surface runoff, leaching, and vaporization, the utilization efficiency or plant uptake of urea is generally below 50% .
text: Nitrogen is the nutrient most used by the grass, and often is the material that burns the lawn when applied at excessive rates.