Liquid Humic Acid Liquid Humic Fertilizers are a concentrated solution of humates (potassium, sodium, less frequently ammonium salts of Humic acids), obtained by a prolonged alkaline extraction at heating for 2-24 hours from the raw material, which is typically Lignite. The resulting solutions have a highly alkaline reaction (pH ranging from 9 to 14). This method of production has been present for over 50 years, and today, it is the most popular. The main advantage of liquid Humic fertilizers is that HA content is at its most active and bio-available state. However, this could be misleading. www.rogitex.com