Humic acid

Soil Secrets: Humic Acids
Dr. Melendez, Soil Secrets, Courtesy Daved Yarrow December 2008

The Web site for the Terra Pro Products, has a good online resource for information at

And they've recently posted videos, for people with high bandwidth connections for people to learn more about their products, and building better soils:

Studies of the Compositions of Humic Acids from Amazonian Dark Earth Soils
Etelvino H. Novotny, Eduardo R. de Azevedo, Tito J. Bonagamba, Tony J. F. Cunha, Beta E. Madari, Vin

Subscribe to Humic acid