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Humic Matter in Soil and the Environment Principles and Controversies

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A large amount of information has accumulated on humic acids andrelated substances, which warrants the creation of an independentscience of humic compounds. Two different concepts have emergedfrom the maze of data, one claiming humic compounds to beoperational or fake compounds, produced by the analytical extractionprocedures, and the other considering them to be natural compoundsoccurring in soils, rivers, lakes, oceans and their sediments.
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Humic Matter in Soil and the Environment Principles and Controversies