Humic Acid is a polycarbon Chain Compound , which is the Main source of Essential Nutrient for the Soil. Humic Acid & Fulvic Acid are found simultaneously in the Extracts in varying proportion. Generally the percentage of Humic Acid is more than Fulvic acid in any given compunds. Humic Acid is ESSENTIAL for a Fertile Soil. It increases the WATER & NUTRIENT uptake capacity