Nitrate is a polyatomic ion with the chemical formula NO₃⁻, consisting of one nitrogen atom and three oxygen atoms. It plays a crucial role in the nitrogen cycle as a nutrient for plants, being one of the primary forms of nitrogen that is assimilated by plants and converted into organic compounds. Nitrate is also a key player in processes that convert atmospheric nitrogen into forms usable by living organisms and influences the ecosystem's health by affecting soil fertility and water quality.
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