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.

My young soybean crop looks light green. I dug up some plants and can hardly see any nodules on the roots. Is it too late to apply ammonium sulfate?


Lack of nodulation is a particularly common problem on fields that have not been on soybeans the previous few years. If nodulation is lacking, it is best to apply at least 60 pounds of nitrogen as a dry product — so that it will not burn the foliage — prior to flowering (Penn State’s Field Crop News, June 2014). Ammonium sulfate’s resistance to volatilization makes it a good fit for such broadcast applications without incorporation.

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