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 much lime is needed to neutralize the acidity created by 200 pounds of ammonium sulfate?


Based on the Association of Official Analytical Chemists’ (AOAC) adopted figures, in order to neutralize 200 pounds of ammonium sulfate per acre, 226 pounds of calcium carbonate (CaCO3) per acre would be required (5.4 kilograms of CaCO3 for every kilogram of nitrogen). Nevertheless, the AOAC value does not consider the effect of soil texture. Applying 200 pounds of ammonium sulfate on clayey soil will have less of an acidifying effect than the same amount of ammonium sulfate applied to a sandy soil given the higher buffering capacity – the resistance to changes in pH – of clayey soils.

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