Humic acid is a class of organic substances mainly found in humus in soil. It is formed by microbial decomposition of plant and animal remains and has a brown to black color. Humic acid usually has a variety of functional groups, such as carboxylic acid, phenolic, amide, etc., and has strong acidity.
G-Teck had researched to make humic acid and fulvic acid with different raw material, such as mine source(leonardite), plant source(corn stalk) etc. Different sourced humic acid and fulvic acid all have effects in improving crops growing.