fulvic acid

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Noun1.fulvic acid - a yellow to yellow-brown humic substance that is soluble in water under all pH conditions; "they measured the fluvial fulvic acid"
humic substance - an organic residue of decaying organic matter
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Boxplot of the contents of total organic carbon (TOC) and carbon in the fractions humin (Hum), fulvic acid (CFA) and humic acid (CHA) in the layers of 0-10 and 10-20 cm
This index is influenced by the quantity of organic matter to be decomposed, producing humic and/or fulvic acids, or by high concentrations of plants in general, which can cause the medium's acidification as a result of the process of photosynthesis (Moura, Martin, & Burguillo, 2007).
Humic substances include two types of organic acids: fulvic acid (Figure 1) and humic acid (Figure 2).
SOM include Humins, Humic Acid (HA) and Fulvic Acid (FA) [5,9].
2007) in long-term fertilizer experiment noted that the contents of humin, humic acid and fulvic acid in the soil were significantly increased with the application of fertilizer and FYM which could be due to the improved soil organic matter and conducive environment for the formation of humic acid in Typic Haplusteps.
Fulvic acid oxidation state detection using fluorescence spectroscopy.
The very low levels of fulvic acids indicate a slow transformation of the organic material because they are soluble in water and in acidic environments.
Fine Fractionation and Purification of the Fulvic Acid Fraction Using Adsorption and Precipitation Procedures.
Some of these deposits are exceedingly rich in a little known substance called fulvic acid.