Soils Geography

  1. Major Soil Orders and Global Distribution
    1. Minimally Developed Soils
      1. Entisols
        1. Fluvents
          1. Psamments
            1. Orthents
              1. Geographic Distribution
                1. Land Use Implications
                2. Inceptisols
                  1. Aquepts
                    1. Ochrepts
                      1. Umbrepts
                        1. Geographic Distribution
                          1. Agricultural Potential
                        2. Volcanic Ash Soils
                          1. Andisols
                            1. Unique Properties
                              1. Allophane Minerals
                                1. Geographic Distribution
                                  1. Management Challenges
                                2. Permafrost-Affected Soils
                                  1. Gelisols
                                    1. Cryoturbation Effects
                                      1. Permafrost Table
                                        1. Geographic Distribution
                                          1. Climate Change Impacts
                                        2. Arid Region Soils
                                          1. Aridisols
                                            1. Calcic Horizons
                                              1. Gypsic Horizons
                                                1. Salic Horizons
                                                  1. Geographic Distribution
                                                    1. Irrigation Potential
                                                  2. Grassland Soils
                                                    1. Mollisols
                                                      1. Mollic Epipedon
                                                        1. High Base Saturation
                                                          1. Geographic Distribution
                                                            1. Agricultural Importance
                                                          2. Forest Soils of Humid Regions
                                                            1. Alfisols
                                                              1. Argillic Horizons
                                                                1. Base Saturation
                                                                  1. Geographic Distribution
                                                                    1. Forest Productivity
                                                                    2. Spodosols
                                                                      1. Podzolization Process
                                                                        1. Spodic Horizons
                                                                          1. Geographic Distribution
                                                                            1. Acidic Conditions
                                                                          2. Highly Weathered Tropical Soils
                                                                            1. Ultisols
                                                                              1. Low Base Saturation
                                                                                1. Clay Accumulation
                                                                                  1. Geographic Distribution
                                                                                    1. Fertility Limitations
                                                                                    2. Oxisols
                                                                                      1. Oxic Horizons
                                                                                        1. Extreme Weathering
                                                                                          1. Geographic Distribution
                                                                                            1. Aluminum Toxicity
                                                                                          2. Organic Soils
                                                                                            1. Histosols
                                                                                              1. Organic Matter Accumulation
                                                                                                1. Wetland Formation
                                                                                                  1. Geographic Distribution
                                                                                                    1. Carbon Storage
                                                                                                  2. Shrink-Swell Soils
                                                                                                    1. Vertisols
                                                                                                      1. High Clay Content
                                                                                                        1. Vertic Properties
                                                                                                          1. Geographic Distribution
                                                                                                            1. Engineering Problems

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                                                                                                        8. Soil Classification Systems

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                                                                                                        10. Soil Degradation Processes and Management