Humic acid is a group of organic compounds formed from microbiological, vegetative, and animal matter. It exists abundantly in soil, natural water, lignite, and aquatic environments. Humic acid can be produced from coal through a process involving grinding, filtering, oxidation, alkali treatment, and acid precipitation to extract the soluble humic acid. It has various applications in agriculture due to its availability from inexpensive indigenous sources like lignitic coal and low-cost production methods. India imports humic acid primarily from China, the US, and Canada, with imports from China accounting for most of the value and quantity.