Search Results for the EPA National Library Catalog

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Your Search: (SUBJECT=Soils Humic acid content.)


 
 
 
Select Item Title Year Published
Humic matter in soil and the environment : principles and controversies / 2014
Humic substances in soil and crop sciences selected readings : proceedings of a symposium cosponsored by the International Humic Substances Society ... in Chicago, Illinois, December 2, 1985 ... / 1990
Humic substances in soil, sediment, and water : geochemistry, isolation, and characterization / 1985

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