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Old 03-14-2010, 01:16 PM
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RigglePLC RigglePLC is online now
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Join Date: Jul 2006
Location: Grand Rapids MI
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Nitrisphere is not a coated or slow-release product. It is a chemical that inhibits the bacteria that carry urease enzyme, slowing the conversion of amonium to nitrate.

Such products according to above reference are not very helpful in turf. Probably your 15-0-0 should be considered as a quick release.
It seems the inhibitor can be leached out due to its water solubility.
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