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Old February 22, 2012   #4
fortyonenorth
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No. It's just important to make sure you're buying P. sulfate (0-0-50) and not P. chloride (0-0-60). P. chloride, which is more common, is very harsh and will definitely have an adverse affect on soil biota.

Quote:
Originally Posted by paulmaren View Post
Would the Potassium sulfate have any negative affect on microorganism populations ?
Thanks
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