npn by cass.gr ..... Ask Moreless: pH Balance
Date: 11/1/2006 1:01:41 PM ( 15 years ago ago)
NPN is "non protein nitrogen". It is what is in most fruits and vegetables that are grown with N-P-K technology whether "organic" or not.
P.S. E bay does have good BRIX testers under 50.00!
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