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    The Facts: Nitrogen Fertilizer

    Nitrogen (N) is one of the most widely distributed elements in nature, since it’s the most abundant gas in the atmosphere. While N isn’t found in mineral forms like phosphorus (P) or potassium (K), it’s largely present in organic compounds. Soil-based N undergoes many complex biological transformations that make it challenging to manage.

    Potassium Nitrate

    Potassium nitrate

    Potassium nitrate (KNO₃) is a soluble source of two major essential plant nutrients. It’s commonly used as a fertilizer for high-value crops that benefit from nitrate (NO₃-) nutrition and a source of potassium (K+) free of chloride (Cl⁻).

    Ammonium Sulfate

    Ammonium sulfate [(NH₄)₂ SO₄⁴] was one of the first and most widely used nitrogen (N) fertilizers for crop production.