What is humic acid and what are its main raw materials

Humic acid refers to the organic matter formed by the decomposition and transformation of animals and plant remains on the earth through microorganisms, as well as a series of geochemical reactions. It is a high molecular organic acid composed of aromatic and various functional groups, and is now widely used in agriculture, animal husbandry, forestry and other fields.
1、 What is humic acid
Humic acid refers to the organic matter formed by the decomposition and transformation of animals and plant remains on the earth through microorganisms, as well as a series of geochemical reactions. It is a high molecular organic acid, which contains a variety of active functional groups and can combine with a variety of nutrient elements to provide sufficient nutrients and trace elements for crops and enhance soil fertility.
2、 What are the main raw materials of humic acid
The main raw materials of humic acid are coal like substances and non coal like substances. Coal materials include weathered lignite, black peat, sapropelic peat and soft lignite; Non coal substances include soil, water, feces, compost, fungi, etc; The best raw material is weathered lignite, and 1kg weathered lignite is equivalent to 5kg organic raw material of other Humic acid.
3、 Classification of humic acids
1. According to the source, it is divided into natural humic acid and artificial humic acid.
2. According to the generation method, it is divided into primary humic acid and regenerated humic acid.
3. According to the size and solubility of humic acid molecules, it can be divided into yellow humic acid, brown humic acid, and black humic acid.
4. According to the natural binding state, it is divided into free humic acid and bound humic acid.
5. According to the absorption coefficient of humic acid, it can be divided into A type, B type, RP type, and P type. Among them, A type and B type are true humic acid, RP type, and P type are immature humic acid.