Definition of fulvic acid in US English:

fulvic acid


  • A highly soluble organic phenol found in humus that chelates elemental mineral nutrients.

    • ‘The invention relates to a colorant composition comprising humic acid and/or fulvic acid and a water soluble dye.’
    • ‘Preliminary findings suggest that rotenone or the humic and fulvic acid treatments can slightly reduce staining.’
    • ‘Most humic acids and fulvic acid are extracted from near ancient prehistoric deposits on top of coal.’
    • ‘By comparing weights of extracted organic matter fractions (glomalin, humic acid, fulvic acid, and particulate organic matter), Nichols found four times more glomalin than humic acid.’
    • ‘It is the fulvic acid that helps maintain the negative electrical charge so vital to the health of living cells.’
    • ‘It is known that chlorine reacts with organic matter (humic and fulvic acids derived from plant decomposition) present in untreated surface water to give disinfection by-products.’
    • ‘This will be a slow, continuous release of humic and fulvic acids until harvest.’
    • ‘Humic substances include fulvic acids, humic acids, the salts of both fulvic and humic acids, and humin.’
    • ‘Organomineralization has also been used to denote early diagenetic precipitation triggered by residual organic compounds such as fulvic acids, an area not treated here.’
    • ‘In horticulture it is the humic, and particularly the fulvic acids which are most reactive and effective in stimulating plant growth.’
    • ‘There, the micro-organisms are nourished and produce fulvic acid to complex with minerals and nutrients to restart the cycle again.’
    • ‘The ability of coal-derived fulvic acid to inhibit the growth of bacteria was examined.’
    • ‘Important for microbial processes that drive many ecosystems in our world, fulvic acid and related humic substances have been documented to interact in some manner with over 50 elements from the periodic table.’
    • ‘The fulvic acids from solid-phase source materials contain only hydrophobic organic acids, so they are operationally equivalent to fulvic acids from natural waters.’
    • ‘A multicomponent analysis was used to describe the effects of UV and visible radiation on the optical absorption spectra of two natural water samples, a Suwannee River fulvic acid standard and a Delaware Bay water sample.’
    • ‘To get fulvic acid you have to do an acid extraction of humic acid.’
    • ‘This influence of fulvic acid was greater at a soil pH of 4 than at 6 and greater also if the ferrihydrite was treated with fulvic acid followed by As, rather than if As was used first.’


fulvic acid