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  2. UAN - Wikipedia

    en.wikipedia.org/wiki/UAN

    The combination of urea and ammonium nitrate has an extremely low critical relative humidity (18% at 30 °C) and can therefore only be used in liquid fertilizers. The most commonly used grade of these fertilizer solutions is UAN 32.0.0 (32%N) known as UN32 or UN-32, which consists of 45% ammonium nitrate, 35% urea and only 20% water. Other ...

  3. Fertilizer - Wikipedia

    en.wikipedia.org/wiki/Fertilizer

    Liquid fertilizers comprise anhydrous ammonia, aqueous solutions of ammonia, aqueous solutions of ammonium nitrate or urea. These concentrated products may be diluted with water to form a concentrated liquid fertilizer (e.g., UAN). Advantages of liquid fertilizer are its more rapid effect and easier coverage. [24]

  4. Urea - Wikipedia

    en.wikipedia.org/wiki/Urea

    Urea is widely used in fertilizers as a source of nitrogen (N) and is an important raw material for the chemical industry. In 1828, Friedrich Wöhler discovered that urea can be produced from inorganic starting materials, which was an important conceptual milestone in chemistry.

  5. Rentech Nitrogen Announces Completion of Project to ... - AOL

    www.aol.com/news/2013-01-15-rentech-nitrogen...

    LOS ANGELES--(BUSINESS WIRE)-- Rentech Nitrogen Partners, L.P. (NYS: RNF) , which manufactures and sells nitrogen fertilizer products including ammonia, urea ammonium nitrate solution (UAN) and ...

  6. Coated urea - Wikipedia

    en.wikipedia.org/wiki/Coated_urea

    Urea is widely used as a nitrogen fertilizer. Its high solubility in water makes it useful for liquid application, and it has a much lower risk of causing fertilizer burn than other chemicals such as calcium cyanide or ammonium nitrate. However, the risk of fertilizer burn with urea can be unacceptably high in some situations, such as higher ...

  7. Seaweed fertiliser - Wikipedia

    en.wikipedia.org/wiki/Seaweed_fertiliser

    A simple liquid fertilizer can be created by fermenting seaweed leaves in water, ... ammonium - NH 4 +, and organic nitrogen in the form of urea. [46]

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