Abstract: A humic acid fertilizer with improved functional compatibility, and methods for making same. The present humic acid fertilizer may be combined with other fertilizers of all pH, EC, and concentrations, for later application of the integrated fertilizer. Humic acid particles are first emulsified using a microemulsion process, in which ore is chemically extracted and then mixed with tall oil and amino primary alcohol. The emulsified humic acid is later combined with a carboxylic acid. Finally, the acidic solution is settled and refined, preferably using one or more stages of centrifuge separation.