How does ammonium sulfate compare with urea-ammonium nitrate solutions when it comes to topdressing nitrogen? | AdvanSix Ammonium Sulfate

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AdvanSix’s agronomy experts are available to answer your questions about how to get the most out of your ammonium sulfate investment. Mercedes Gearhart has overseen agronomic research at AdvanSix for more than 20 years, and has a wealth of knowledge about fertilizer use efficiency and improving crop yields. Check out the questions asked below or ask your own question.

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How does ammonium sulfate compare with urea-ammonium nitrate solutions when it comes to topdressing nitrogen?
Topdressing dry ammonium sulfate is a more efficient alternative for several reasons:
  • Given that it does not have the initial basic reaction of urea and urea-based products upon application, it is less prone to loss as ammonia gas
  • Given that all of the nitrogen is in the ammonium form, it is less prone to leaching than nitrate on coarse soils, and less prone to denitrification on heavy soils
  • Under conservation tillage, dry crystals are able to make it through the residue, making it less prone to immobilization

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