potassium is a kind of nutrient for plant growth
potassium_32 is potassium. potassium is element. potassium_nitrate is inorganic_compound. potassium is not element. potassium is not mineral. potassium_chlorate is salt. potassium is alkaline_metal. potassium_phosphate is inorganic_substance. potassium_phosphate is salt. potassium is mineral.