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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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