Leonardite Source Natural Humic Acid 70%

Although it is well known that humates are potential types of organic fertilizer, enough information is not available on the properties of humic substances that 

The best source of humic acids are the sedimentation layers of soft brown coal, which are referred to as Leonardite. (pic.1.2, pic.1.3) Humic acids are found in high 

Leonardite is the mineral remains of prehistoric vegetation that lived during a period of optimal growth on earth. Leonardite has been used as a fertilizer and soil enhancer for centuries due to the high content of naturally occurring humic – and fulvic acids

To alleviate establishment costs, some growers incorporate Leonardite and/or its extracts, humic and fulvic acids, to increase organic matter. To extract humic and 

Unlike other organic sources of humic acid, Leonardites are highly bioactive due to their molecular structure – up to five times more than common humus 

Presently, pine bark is used to amend soils to increase organic matter and lower pH. ... To precipitate the humic acid, the solution is adjusted to pH 1 with a mineral acid, e.g. H2SO4. Three Leonardite products, two humic acids and one unextracted Leonardite, were analyzed for nutrient content