Assertion: fertilizer | /r/MadeOf | the nitrogen
Facets:
value: in the proportion
type: OTHER
Source sentences:
text: Sometimes a fertilizer of this kind will be advertised for use on a certain crop, and will contain the nitrogen, phosphoric acid and potash in the proportion in which the manufacturer believes they will produce the best yields of that crop.
text: For established or mature trees, a fertilizer containing only nitrogen may be selected, especially if a complete fertilizer is applied to the lawn around the tree once or twice per year.