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BOOK SUMMARY :

Humic substances are organic compounds that are important components of humus the major organic fraction of soil peat and coal and also a constituent of many upland streams dystrophic lakes and ocean waterfor a long era in the 19th and 20th centuries humic substances were often viewed through a lens of acidbase theory that described humic acids as organic acids and their humic substances can be defined as a general category of naturally occurring biogenic heterogeneous organic substances that can generally be characterized as being yellow to black in color of high molecular weight mw and refractory aiken et al 1985bhumic substances hs represent the organic material mainly widespread in nature hs have positive effects on plant physiology by improving soil structure and fertility and by influencing nutrient uptake and root architecture the biochemical and molecular mechanisms underlying these events are only properties of humic substances humic acids the fraction of humic substances that is not soluble in water under acidic conditions ph 2 but is soluble at higher ph valuesthey can be extracted from soil by various reagents and which is insoluble in dilute acid humic acids are the major extractable component of soil humic substancesa 1982 study found that injections with humic substances were highly effective as high as 90 at stopping the growth of thyroid tumors 7 better sleep the majority of patients who used humic and fulvic acids for other purposes reported better sleep as well 8 humic acid protects cells defense mechanisms against viruses

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