Humic acid is the product of humification of organic matter in soil. Peat, lignite and weathered coal contain a lot of humic acid. Humic acid fertilizer is made of humic acid as the main raw material, adding a certain amount of nitrogen, phosphorus, potassium or some trace elements. It contains a lot of organic matter and a lot of effective nutrients. It is a multifunctional organic-inorganic compound fertilizer.

• Humic acid fertilizer is a kind of multi-functional organic fertilizer, which can improve the soil and its fertility, strengthen the activity of soil microorganisms, activate soil nutrients, so that nitrogen, phosphorus, potassium and other nutrients release slowly.
• Improve the stress resistance of crops
• Humic acid fertilizer is a kind of plant growth regulator, which can increase the activity of oxidase and other metabolic activities in plants. Stimulate plant growth. It can also degrade pesticide residues and reduce environmental pollution.

Normal formulas(N-P₂O₅-K₂O): 15-3-5, 13-2-8, 10-3-10, 15-2-5, 8-8-8 etc.