Generic Materials Search: humates

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View the OMRI Generic Materials List Glossary in PDF format here.
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Fulvic Acids
Allowed
Crop Fertilizers and Soil Amendments
Nonsynthetic
Fulvic acids are the fractions of humates soluble at neutral to acid pH. May be extracted from allowed humates by use of hydrolysis or naturally occurring acids. See also HUMATES.
205.203(d)(2) A mined substance of low solubility.
Humates
Allowed
Crop Fertilizers and Soil Amendments
Nonsynthetic
Acceptable if derived from leonardite, lignite, or coal; not acceptable if fortified with synthetic nutrients. See also MINED MINERALS – UNPROCESSED. See Glossary for definition of "humates."
205.203(d)(2) A mined substance of low solubility.
Humic Acids – alkali extracted
Allowed
Crop Fertilizers and Soil Amendments, Crop Management Tools and Production Aids
Synthetic
Also called humic acid derivatives. Extracts from nonsynthetic humates by hydrolysis using synthetic or nonsynthetic alkaline materials are permitted. Includes humates that are extracted using potassium hydroxide and ammonium hydroxide, provided that the synthetic extractant is limited to that amount necessary for extraction and is not used to fortify the potassium or nitrogen analysis. See also HUMIC ACIDS – NONSYNTHETIC. Some humic acid derivatives may be used both as an adjuvant or inert ingredient in EPA registered and exempt pesticides. See also INERTS – LIST 4.
205.601(j)(3) As plant or soil amendments… Humic acids—naturally occurring deposits, water and alkali extracts only.
Humic Acids – nonsynthetic
Allowed
Crop Fertilizers and Soil Amendments, Crop Management Tools and Production Aids
Nonsynthetic
Naturally occurring deposits of humic acids and water extracted humates. See also HUMIC ACIDS – ALKALI EXTRACTED.
205.203(d)(2) & 205.601(j)(3) A mined substance of low solubility. As plant or soil amendments… Humic acids—naturally occurring deposits, water and alkali extracts only.