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Humic acid
From Wikipedia
Humic acid is one of the major components of humic substances (or Natural Organic
Matter (NOM)) which are dark brown and major constituents of soil organic matter humus
that contributes to soil chemical and physical quality and are also precursors of some
fossil fuels. They can also be found in peat, coal, many upland streams and ocean water.
Humic substances make up a large portion of the dark matter in humus and are complex
colloidal supramolecular mixtures (Piccolo, 1996, 2001; MacCarthy, 2001) that have never
been separated into pure components. Since the end of the 18th century, humic
substances have been designated as either humic acid, fulvic acid or humin. These
fractions are defined strictly on their solubility in either acid or alkali, describing the
materials by operation only, thus imparting no chemical information about the extracted
materials. The term humic substances is used in a generic sense to distinguish the
naturally occurring material from the chemical extractions named humic acid and fulvic
acid, which are defined “operationally” by their solubility in alkali or acid solutions. It is
important to note, however, that no sharp divisions exist between humic acids, fulvic
acids and humins. They are all part of an extremely heterogeneous supramolecular system
and the differences between the subdivisions are due to variations in chemical
composition, acidity, degree of hydrophobicity and self-associations of molecules. When
humic substances are characterized, especially when functionality is studied, there is
always the problem that one usually has to separate the huge number of different
bioorganic molecules into homogenous fractions.
Humic substances arise by the microbial degradation of biomolecules (lipids, proteins,
carbohydrates, lignin)dispersed in the environment after the death of living cells. A
modern structural description regards humic material as a supramolecular structure of
relatively small bio-organic molecules (having molecular mass <1000 Da) self-assembled
mainly by weak dispersive forces such as van der Waals,π-π, and CH-π bonds into only
apparently large molecular sizes (see http://www.suprahumic.unina.it/).
A large amount of humic molecules are represented by hydrophobic compounds (long
alkyl-chain alkanes, alkenes, fatty acids, sterols, terpenoids, and phenyl-alkyl residues of
lignin degradation) which allow their self-association into supramolecular structures
separated from the water medium and, thus, their long residence time in the environment.
Humic substances are endowed with acidic functional groups mainly carboxylic acid,
which confer on these molecules the ability to chelate multivalent cations such as Mg2+,
Ca2+, and Fe2+. This chelation of ions is an important role of humic acids with respect to
living systems. By chelating the ions, they facilitate the uptake of these ions by several
mechanisms, one of which is preventing their precipitation, another seems to be a direct
and positive influence on their bioavailability.
ORGANIC NATURAL PLANT FOOD & ROOT GROWTH PROMOTER
Plant bio-stimulants are materials that promote plant growth. The importance of bio-
stimulants lies in their ability to promote hormonal activity in plants. Plant hormones are
chemical communicators, or agents, which help regulate a plant’s development and its
response to its surrounding environment.
Bio-stimulants also promote antioxidant production in plants which, in turn, reduces “free
radicals”. Free radical molecules result from stress such as drought, heat, ultraviolet light
and herbicide use. Free radicals are damaging because they are strong oxidizing agents
which damage lipids, proteins and DNA within plants cells.
Antioxidants are metabolites and enzymes which seek out free radical molecules and
protect plants from damage. They include lipid soluble substances like vitamin "E" and
beta-carotene and water soluble materials such as vitamin C and various enzymes.
This article appeared in the June 2002 web issue of Horticulture Update,
edited by Dr. Douglas F. Welsh, and produced by Extension Horticulture,
Texas Cooperative Extension, The Texas A&M University System, College Station, Texas.
Granular Humate: used by farmers and homeowners for lawn and garden!
Dallas FT Worth… City of Keller has 8 soccer fields, used granular humate (100 lbs/acre), then later with
Enviro Gro blend and our Horticultural Molasses. The fields had 16-25 games a week on them and they
still had grass. The city council purchased the products for all city parks and areas. The only wear was in
front of goal posts and along side lines. They were used to having only hard packed dirt by the soccer
season end.
• Germination stimulated by 30 to 60 ppm humic acid (statistics from corn study by Pagel, 1960)
• Enhanced root development. (Ivanov, 1965)
• Stimulates seedling growth.
• Increases plant uptake of NPK fertilizers. (Chemical fertilizers = nitrogen, phosphorous and
potassium)
• Enhanced yield and increases uptake of iron into plants.
• Serves as a remedy to lime-induced chlorosis* in soil. (*a loss of chlorophyll causing whitening in
plants)
• Crops less susceptible to the formation of aphlatoxins (fungus) during stress producing growing
conditions such as too much rain fall or drought.
• Over applying will not burn the plantings.
• Complexes and increases sugars in fruits by humic acids presence.
• Sweeter, firmer pulp in melons; 1 to 2 week longer shelf life. Less root rot in melons also!
• Elongation of bean stems (Poapst et.al., 1970)
• Plants are less susceptible to disease and insects.
