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15
CH3041
SOIL HUMIC MATTER
• Soil humic matter
is classified in a
similar manner to
aqueous humic
matter.
is classified in a
similar manner to
aqueous humic
matter.
• Fulvic & humic
acids and humin.
acids and humin.
Soluble
Insoluble
Humin
Humin
Soil Humus
Alkali
extraction
Soluble
Fulvic Acid
Fulvic Acid
Insoluble
Humic Acid
Humic Acid
Acid
extraction 0.1N
• Hydrophobic interactions
favour sorption of non-
polar organic material onto
humic surfaces rather than
polar mineral surfaces.
eg. pesticides.
favour sorption of non-
polar organic material onto
humic surfaces rather than
polar mineral surfaces.
eg. pesticides.
Humic
