How do ammonium sulfate and gypsum differ?

While both materials contain 100% sulfate sulfur, there are key differences: One is largely a fertilizer, and the other is largely a soil amendment. Sulf-N® ammonium sulfate is an established fertilizer in U.S. crop production, used for

Do all sulfur fertilizers come in sulfate form?

No. While many fertilizers come in an all-sulfate form, some fertilizers only come in the elemental sulfur form, and some are a combination of elemental sulfur and sulfate. Sulf-N® ammonium sulfate contains 24 units of sulfur – all