Assertion: fertilizer | /r/MadeOf | iron
Facets:
value: besides the primary elements
type: OTHER
Source sentences:
text: Besides the primary elements (N, P and K) the fertilizer may contain secondary plant nutrients, such as calcium, magnesium, sulfur, iron, manganese, zinc, copper, and molybdenum.
text: While fertilizers contain calcium, magnesium, iron and other trace elements; the major components in “all purpose” fertilizers you buy at the hardware store or nursery are primarily composed of nitrogen, phosphate and potassium.