To my understanding, CA testing method does not recognize the fulvic
acid aspect. Fulvic acid is soluble in either high or low pH.
Regards
TaChung Huang (¶À¤j©¾)
-----Original Message-----
From: TPiatkowsk_at_aol.com [mailto:TPiatkowsk_at_aol.com]
Sent: Monday, January 13, 2003 11:23 PM
To: compost_tea_at_yahoogroups.com
Subject: Re: RES: RES: [compost_tea] Humic Acid
I recommend that those of you wishing to evaluate humic products send
samples
to A&L Agricultural labs in Modesto California. Have them run the assay
for
humic acid and have them run the CDFA assay (California assay). This
will
give you a measure of the humic acid content and an indication of its
nature
with respect to the size of the molecules.
I would also recommend you request the Salt Index, the levels of S, Na,
K and
the pH.
This will provide you with some information to judge the quality of the
material.
Tom Piatkowski
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Received on Tue Jan 14 2003 - 14:36:28 EST