Organomineral Fertilizers

(or humic fertilizers), fertilizers that consist of organic matter and mineral compounds bound to it either chemically or by adsorption. Organomineral fertilizers are produced by treating humic acids or materials containing them (peat, lignite, silts, shales, or humus) with ammonia, ammoniacal solutions of phosphates or phosphoric acid, and potassium salts. Organomineral fertilizers have various compositions and names: humoammophos, humoammophoska, peat-ammonia fertilizers (PAF), peat-mineral-ammonia fertilizers (PMAF), and humates of sodium and ammonium.