humic substances are formed is based on 4 published theories:
1.Lignin modification.
2.Quinone Amino Acid Interaction.
3.Microbial Synthesis of Aromatics.
4.The Mallard Reaction.
jim items answered the question on October 12, 2018 at 17:42
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b-
c-
d-
e-
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ff-
g-
h-
i-
j-
jj-
k-
m-
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o-
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