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2. 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.

3. 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 ...

4. Fertilizer - Wikipedia

   en.wikipedia.org/wiki/Fertilizer

   This ammonia is used as a feedstock for all other nitrogen fertilizers, such as anhydrous ammonium nitrate (NH 4 NO 3) and urea (CO(NH 2) 2). Deposits of sodium nitrate (NaNO 3 ) ( Chilean saltpeter ) are also found in the Atacama Desert in Chile and was one of the original (1830) nitrogen-rich fertilizers used. [ 35 ]

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. Nitrogen and Non-Protein Nitrogen's effects on Agriculture

   en.wikipedia.org/wiki/Nitrogen_and_Non-Protein...

   When discussing the application of nitrogen in agriculture, it is essential to consider the sources of nitrogen used. Synthetic nitrogen fertilizers, such as ammonium nitrate and urea, are commonly applied to crops to replenish soil nitrogen levels and enhance crop productivity [3] These fertilizers provide readily available nitrogen for plant ...

7. Ammonia volatilization from urea - Wikipedia

   en.wikipedia.org/wiki/Ammonia_volatilization...

   Since urea is not an oxidizer at standard temperature and pressure, it is safer to handle and less of a security risk than other common nitrogen fertilizers, such as ammonium nitrate. However, if urea is applied to the soil surface, a meaningful fraction of applied fertilizer nitrogen may be lost to the atmosphere as ammonia gas; this only ...