Ammonium Thiosulfate (ATS)

Thiosulfate (S2O32-) fertilizers are a liquid sulfur additive than can be combined with various other fertilizer sources to satisfy plant nutrient requirements. While many fluid thiosulfate fertilizers are available, ammonium thiosulfate (ATS) is the most widely used fluid fertilizer that contains sulfur; it is composed of sulfur dioxide, elemental sulfur, and aqueous ammonia. Product examples include Kugler ATS and Thio-Sul®. The map above shows trial locations for corn.

Results Summary

An intensive and extensive review of the literature was completed to assess the effectiveness of ATS (Ammonium Thiosulfate) to increase yield of corn and wheat. All the research was completed on small plots. The average corn yield change measured for ATS when ATS was applied with fertilizer N — was not statistically different from zero bushel/acre. ATS did not have any beneficial yield impacts. The average yield change measured for ATS on wheat when ATS was applied with UAN fertilizer was not statistically different from zero bushel/acre. Though a yield increase was found for spring wheat fertilized with aqueous ammonia (AA) these results were based on only a single trial and should be interpreted with caution.

For more information on ATS:

To view additional research and learn more about the TED framework — please visit our ATS study overview page.

To view the complete report – including references – please visit the ATS research findings page.