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RE: RES: RES: [compost_tea] Humic Acid



Title: Message
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 (黃大忠)

-----Original Message-----
From: TPiatkowsk@aol.com [mailto:TPiatkowsk@aol.com]
Sent: Monday, January 13, 2003 11:23 PM
To: compost_tea@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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