Soils Geography

  1. Soil Composition and Components
    1. The Four-Phase System
      1. Mineral Matter
        1. Typical Proportions
          1. Size Distribution
            1. Chemical Composition
            2. Soil Organic Matter
              1. Percentage by Volume
                1. Variability by Climate
                  1. Functional Importance
                  2. Soil Water
                    1. Volumetric Content
                      1. Seasonal Variation
                        1. Plant Availability
                        2. Soil Air
                          1. Pore Space Occupation
                            1. Gas Composition
                              1. Exchange Processes
                            2. Mineral Components
                              1. Primary Minerals
                                1. Quartz Properties
                                  1. Feldspar Characteristics
                                    1. Mica Properties
                                      1. Ferromagnesian Minerals
                                        1. Weathering Susceptibility
                                        2. Secondary Minerals
                                          1. Clay Mineral Formation
                                            1. Silicate Clay Types
                                              1. Kaolinite Structure
                                                1. Smectite Structure
                                                  1. Illite Structure
                                                    1. Vermiculite Structure
                                                    2. Iron and Aluminum Oxides
                                                      1. Goethite Formation
                                                        1. Hematite Properties
                                                          1. Gibbsite Occurrence
                                                          2. Carbonate Minerals
                                                            1. Calcite Precipitation
                                                              1. Dolomite Formation
                                                          3. Soil Organic Matter Components
                                                            1. Living Biomass
                                                              1. Root Systems
                                                                1. Microbial Biomass
                                                                  1. Soil Fauna
                                                                  2. Fresh Organic Matter
                                                                    1. Plant Litter
                                                                      1. Root Exudates
                                                                        1. Microbial Residues
                                                                        2. Decomposing Organic Matter
                                                                          1. Partially Decomposed Materials
                                                                            1. Intermediate Products
                                                                            2. Humus
                                                                              1. Humic Acids
                                                                                1. Fulvic Acids
                                                                                  1. Humin Fraction
                                                                                    1. Stability and Turnover

                                                                                Previous

                                                                                1. Introduction to Soils Geography

                                                                                Go to top

                                                                                Next

                                                                                3. Physical Properties of Soil