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Old 03-14-2010, 02:16 PM
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RigglePLC RigglePLC is offline
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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.
http://www.nutrisphere-n.com/howitworks.aspx

http://books.google.com/books?id=u7Z...fgrass&f=false

Such products according to above reference are not very helpful in turf. Probably your 15-0-0 should be considered as a quick release.
http://www.scstma.org/upkeep/resourc...ertilizers.pdf
It seems the inhibitor can be leached out due to its water solubility.
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