1 Chemical Composition and Physical Properties of Humic Substances.- 2 Saccharides.- 3 Nitrogenous Substances.- 4 Other Organic Phosphorus Compounds.- 5 Sulfur in Soil Organic Substances.- 6 Fats, Waxes, and Resins in Soil.- 7 Micromorphology of Soil Organic Matter.- 8 Humus of Virgin and Cultivated Soils.Springer Book Archives