What is humic acid?

Humic acid is a principal component of humic substances, which are the major organic constituents of soil (humus), peat, coal, many upland streams, dystrophic lakes, and ocean water.
It is produced by biodegradation of dead organic matter. It is not a single acid; rather, it is a complex mixture of many different acids containing carboxyl and phenolate groups so that the mixture behaves functionally as a dibasic acid or, occasionally, as a tribasic acid. Humic acids can form complexes with ions that are commonly found in the environment creating humic colloids. Humic and fulvic acids (fulvic acids are humic acids of lower molecular weight and higher oxygen content than other humic acids)are commonly used as a soil supplement in agriculture, and less commonly as a human nutritional supplement. As a nutrition supplement, free form (unreacted)

what is the basic function of humic acids?

1) Improve the structure of soil .For light and sand soil, it can retain water nutrient . For heavy and compact soil, working with fungi to create a crumb structure for better water oxygen and nutrients intake and improved root .

2) Adjust PH value of soil, it can neutralize both acidic and alkaline soil .

3) Stimulate plant growth, increase the yield and quality.

4) Reduce nitrate leaking into the groundwater and protect the underground water.

5) Increase the effectiveness of herbicide pesticide and fungicide, immobilize or reduce their harmful residues.

What is potassium humate?