SEARCH Articles Figures Tables An Introduction to Humic Substances in Soil, Sediment, and Water Biological aspects of soil pollution by petroleum substances and natural gas Components, rocks, soil substances Extraction inorganic substances, soil Extraction organic substances, soil Humic material/substances soil/terrestrial Humic substances amended soils Humic substances surface soils In soil humic substances Migration of Water-Soluble Substances in Rocks and Soils Nature and Classification of Soil Humic Substances Of soil humic substances Soil Science Humic Substances Soil humic substances Soil humic substances, heavy metal Soil-root interactions, humic substances Soil-root interface organic substance gradients Soil: acidification 352 humic substances Structural analysis of humic substances in water and soils The adsorption of substances on soil particles