humic


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Related to humic: humic acid, humic coal

humic

[′hyü·mik]
(geology)
Pertaining to or derived from humus.
References in periodicals archive ?
This step enables determination of the absorbance from peptide bonds, phenolic groups within humic compounds and chromogenic amino acids (tyrosine, tryptophan).
FIGURE 2: Organic Carbon content on fractions of the humic substances (SH): fulvic acids (AF), humic acids (AH), humin (HUM), and non-humic substances (SNH) on Humic Cambisol from areas under native grassland (CN), five-year old Pinus (P05), sixteen-year old Pinus (P16), and twenty-one-year old Pinus (P21) (Graph A) and proportion of these chemical fractions related to total organic carbon (TOC) (Graph B).
Regarding C distribution in the stable fraction of SOM, there was a predominance of humin (Hum) in comparison to the fractions humic acid (HA) and fulvic acid (FA), regardless of the analyzed management systems and layers (Figures 1C, D, E, F, G and H).
Poorly weathered coal present in Pakistan consists of sizeable amount of humic acid which can be used effectively to boost up agricultural production (Hai and Mir, 1998).
Humic substances include two types of organic acids: fulvic acid (Figure 1) and humic acid (Figure 2).
Major portion of SOM (80%) are humic substances, these substances improve certain properties of soil like buffering capacity, moisture retention and availability of micronutrients [6,7].
In the ion poor blackwater rivers of Amazon, the humic substances may have a direct action on the gills, exerting a protective effect at low pH and, being able to replace any protective property that [Ca.
27) Humic acids are important to increase the availability of micronutrients, increasing their uptake into the plant.
The Experiment was conducted to investigate the response of banana plants to microelements (ME), humic acid (H.
The adsorption for Pb(II) on HA was high and this may due to its strong affinity for carboxylic and phenolic groups of humic substances.