Assertion: fertilizer's phosphorus | /r/HasProperty | primary elements
Facets:
Source sentences:
text: Nitrogen, phosphorus, and potassium are primary elements that are essential for plant growth.
text: Plants also need phosphorus, another primary nutrient.
text: Nitrogen, phosphorus and potassium are the three primary nutrients.
text: Phosphorus is considered a primary nutrient because it is essential for plant growth and because the quantity required by crops is large relative to the supply of available phosphorus in many soils.