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Preface | |
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Describing Soil | |
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The Soil Is the Nation | |
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Overview | |
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Objectives | |
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Key Terms | |
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Why Study Soil? | |
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The Importance of Soil | |
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Summary | |
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End of Chapter Questions | |
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Further Reading | |
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References | |
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Soil Geography and Genesis | |
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Overview | |
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Objectives | |
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Key Terms | |
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Soil-Forming Factors | |
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Parent Materials | |
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Weathering | |
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Relief | |
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Climate and Organisms (Plants, Microbes, and Animals) | |
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Time | |
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Anthropogenesis (Human Influence) | |
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The Soil Profile | |
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Summary | |
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End of Chapter Questions | |
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Further Reading | |
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References | |
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Soil Taxonomy and Classification | |
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Overview | |
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Objectives | |
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Key Terms | |
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What Is Classification? | |
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Basis of Classification | |
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Soil Orders | |
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Nomenclature and Ordering in Soil Taxonomy | |
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The Soil Orders in Soil Taxonomy | |
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Other Soil Classification Systems | |
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Soil Color | |
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Summary | |
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End of Chapter Questions | |
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Further Reading | |
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References | |
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Soil Physical Properties | |
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Soil Solids: Particle Size and Texture | |
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Overview | |
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Objectives | |
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Key Terms | |
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Primary Soil Particles | |
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Soil Texture | |
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How Is Texture Determined | |
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Soil Separates and Their Distribution | |
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Improving Clay Soil | |
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Summary | |
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End of Chapter Questions | |
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Further Reading | |
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Reference | |
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Soil Solids: Structure, Aggregation, and Porosity | |
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Overview | |
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Objectives | |
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Key Terms | |
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Soil Structure | |
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Processes that Influence Structural Stability | |
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Why Is Structure Important? | |
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Soil Porosity and Pore Size Distribution | |
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How Are Bulk Density and Porosity Determined? | |
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Soil Structural Management | |
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Summary | |
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End of Chapter Questions | |
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Further Reading | |
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Reference | |
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Soil Water, Temperature, and Gas Relations | |
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Overview | |
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Objectives | |
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Key Terms | |
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The Water Molecule | |
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Water Content and Availability | |
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Water Availability | |
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Water Potential | |
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Water Flow | |
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Soil Texture Effects on Water Flow | |
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Water Effects on the Soil Climate | |
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Gas and Gas Transport in Soil | |
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Summary | |
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End of Chapter Questions | |
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Further Reading | |
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References | |
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Soil Chemical Properties | |
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Soil Minerals and Weathering | |
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Overview | |
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Objectives | |
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Key Terms | |
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Rocks and Minerals | |
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Clay Minerals and Soil Colloids | |
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Layer Silicate Clays | |
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Source of Charge | |
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Types of Silicate Clays | |
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Summary | |
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End of Chapter Questions | |
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Further Reading | |
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References | |
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Surface Chemistry of Soils | |
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Overview | |
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Objectives | |
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Key Terms | |
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Ion Exchange | |
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Exchange Capacity | |
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Soil Acidity | |
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Types of Soil Acidity | |
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The Role of Aluminum | |
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Buffer Capacity | |
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Summary | |
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End of Chapter Questions | |
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Further Reading | |
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References | |
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Soil Biological and Biochemical Properties | |
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Soil Organisms | |
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Overview | |
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Objectives | |
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Key Terms | |
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What Organisms Are Present in Soil? | |
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Physiological Characteristics | |
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Environmental Effects and Soil Organisms | |
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Soil Organisms and Their Distribution | |
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Numbers and Mass of Soil Organisms | |
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Soil Organisms and Their Ecological Roles | |
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Ecological Interactions | |
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Summary | |
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End of Chapter Questions | |
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Further Reading | |
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References | |
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Soil Biogeochemical Cycles | |
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Overview | |
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Objectives | |
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Key Terms | |
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Biogeochemical Transformations | |
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The Carbon Cycle | |
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The Nitrogen Cycle | |
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The Phosphorus Cycle | |
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The Sulfur Cycle | |
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The Iron and Manganese Cycle | |
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Biogeochemical Transformations of Heavy and Trace Metals | |
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Summary | |
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End of Chapter Questions | |
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Further Reading | |
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References | |
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Soil Organic Matter | |
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Overview | |
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Objectives | |
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Key Terms | |
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What Is Soil Organic Matter? | |
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What Is the Composition of SOM? | |
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Why Is SOM Important? | |
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How Does SOM Form? | |
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SOM Decomposition | |
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Where Is SOM Found and How Quickly Does It Accumulate? | |
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Summary | |
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End of Chapter Questions | |
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Further Reading | |
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References | |
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Soil Management | |
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Physical Management | |
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Overview | |
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Objectives | |
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Key Terms | |
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Tillage and Agriculture | |
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Construction and Nonagricultural Uses of Soil | |
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Physical Degradation of Soil | |
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Conservation Measures | |
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Organic Matter and Residue | |
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Summary | |
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End of Chapter Questions | |
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Further Reading | |
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References | |
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Our Water Resources: The Hydrologic Cycle and Watershed Management | |
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Overview | |
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Objectives | |
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Key Terms | |
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Distribution of Water on Earth | |
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Water Resource Issues | |
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The Hydrologic Cycle | |
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Watershed Management | |
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Summary | |
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End of Chapter Questions | |
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Further Reading | |
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References | |
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Soil Fertility and Nutrient Management | |
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Overview | |
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Objectives | |
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Key Terms | |
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The Essential Nutrients for Plants and People | |
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The Forms of Nutrients in Soil | |
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Sources of Native Fertility | |
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Retention and Release of Soil Nutrients | |
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Fertilizers and Fertilization | |
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Problem Soils and Solutions | |
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Nutrient Management Plans | |
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Summary | |
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End of Chapter Questions | |
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Further Reading | |
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References | |
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Integrating Soil with Other Resources | |
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Soil Inventories and Mapping | |
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Overview | |
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Objectives | |
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Key Terms | |
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Soil Surveys | |
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Soil Use Classification | |
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Summary | |
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End of Chapter Questions | |
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Further Reading | |
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References | |
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Soil as a Natural Resource | |
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Overview | |
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Objectives | |
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Key Terms | |
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Soil as a Natural Resource | |
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Historical Reflections on Soil and Soil Degradation | |
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Development of National Policies Related to Soil | |
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Federal Acts Relating to Soil | |
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Soil Surveys and Policy | |
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Soil Erosion and Policy | |
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Soil Quality and Policy | |
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Current and Potential State Policies Toward Soil Conservation and Environmental Degradation | |
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Local Control of Soil Resources | |
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Summary | |
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End of Chapter Questions | |
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Further Reading | |
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References | |
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Epilogue | |
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Useful Unit Conversion Factors | |
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Glossary | |
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Index | |