Ammonium sulfate is virtually non-volatile as long as we are referring to non-calcareous soils. Accordingly, ammonium sulfate is recommended over urea or urea-containing products (such as urea ammonium nitrate solutions) whenever broadcast applications are not followed by …
UAN
When it comes to fertilizer injury, is there any difference between nitrogen and sulfur sources?
Yes. Urea, urea ammonium nitrate and ammonium thiosulfate can cause more damage from ammonia toxicity than ammonium sulfate or ammonium nitrate. For this reason, the former three sources are not recommended for applications in close proximity to …