Sulfur in Fertiliser: What Does it Mean?

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Stroodle
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Hi,

I'd just like to know why fertiliser producers refer to "the percentage by mass of sulfur present as sulfate" in their fertilisers?

Thanks!
 
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Do you know the solubility rules for sulfates, sulfides and elemental sulfur?
 
Nope. Unfortunately i don't :(
 
So they don't have to speciate it.
 
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