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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.
How would ammonium sulfate compare with urea when it comes to volatility on calcareous ground?
Even under calcareous conditions (soil pH 7.6-8.2), ammonium sulfate would still be less volatile than urea. This is because urea hydrolysis raises pH to significantly higher levels (as high as 9.0).