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2. Potassium humate - Wikipedia

   en.wikipedia.org/wiki/Potassium_humate

   Potassium humate is used in agriculture as a fertilizer additive to increase the efficiency of fertilizers especially nitrogen- and phosphorus-based fertilizer inputs. Other salts of humic acid are manufactured, mainly sodium humate, which is used in animal health supplements. It also can be used in aquaculture.

3. Humic substance - Wikipedia

   en.wikipedia.org/wiki/Humic_substance

   Humic substances account for 50 – 90% of cation exchange capacity in soils. "Humic substances" is an umbrella term covering humic acid, fulvic acid and humin, which differ in solubility. By definition, humic acid (HA) is soluble in water at neutral and alkaline pH, but insoluble at acidic pH < 2. Fulvic acid (FA) is soluble in water at any pH.

4. International Humic Substances Society - Wikipedia

   en.wikipedia.org/wiki/International_Humic...

   The International Humic Substances Society was founded in Denver, Colorado, USA, on September 11, 1981 by scientists who saw a need for a society to bring together scientists in the coal, soil, and water with interest in humic substances, and to provide opportunities for them to exchange ideas .

5. Compost - Wikipedia

   en.wikipedia.org/wiki/Compost

   The benefits of compost include providing nutrients to crops as fertilizer, acting as a soil conditioner, increasing the humus or humic acid contents of the soil, and introducing beneficial microbes that help to suppress pathogens in the soil and reduce soil-borne diseases.

6. Organic fertilizer - Wikipedia

   en.wikipedia.org/wiki/Organic_fertilizer

   Processed organic fertilizers include compost, liquid plant manures, humic acid, grain meal, amino acids, and seaweed extracts. Other examples are natural enzyme-digested proteins. Decomposing crop residue (green manure) from prior years is another source of fertility.

7. Talk:Humic substance - Wikipedia

   en.wikipedia.org/wiki/Talk:Humic_substance

   Apparently "humic substance" is a relatively rarely used term and concept, which refers to compounds present in untreated humus; whereas "humic acid", "fulvic acid" and "humin" are not "humic substances", but compounds derived from humus by chemical treatment. While "humic acid" and "fulvic acid" have indefinite chemical composition, they are ...