ALBERT

Note: CONTENTS: 1 The Soil Solid Phase. - 1.1 Characteristics of the Primary Particles. - 1.1.1 Characterization of Particle Size. - 1.1.2 Classification of Textural Size Fractions. - 1.1.3 Chemical and Mineralogical Properties. - Sand and Silt Fraction. - Clay Fraction. - 1.1.4 Shape of Soil Particles. - 1.1.5 Surface Area of Soil Particles. - Relationship to Particle Size. - Relationship to Clay Mineralogy. - 1.1.6 Surface Properties of Clay Particles. - Density of Charge. - Ionic Adsorption. - Cation Adsorption. - Diffuse Double Layer. - Cation Exchange Equations. - Anion Adsorption. - Adsorption of Nonelectrolytes. - Ion Adsorption and Flocculation. - Adsorption Isotherms. - Adsorption of Gases. - Measurement of Specific Surface Area. - Measurement of Cation Exchange Capacity. - 1.2 Characteristics of Bulk Soil. - 1.2.1 Volume Fractions. - 1.2.2 Bulk and Mineral Densities. - Measurement of Bulk Density. - 1.2.3 Soil Structure. - Aggregation. - Aggregate Analysis. - Stability of Structure. - Problems. - 2 Water Retention in Soil. - 2.1 Properties of Water. - 2.1.1 Molecular Properties of Water. - 2.1.2 Fluid Properties of Water. - Thermal and Mechanical Properties. - Surface Tension and Interfacial Curvature. - Contact Angle. - Capillary Rise. - Viscosity. - Osmotic Pressure. - 2.1.3 Water Near Particle Surfaces. - 2.2 Soil Water Content. - 2.2.1 Definitions. - 2.2.2 Measurement of Soil Water Content. - Measurement of [Theta]g. - Measurement of [Theta]v by Mass and Volume Estimation. - Measurement of [Theta]v by Gamma Ray Attenuation. - Measurement of [Theta]v by Neutron Attenuation. - Measurement of [Theta]v by Time Domain Reflectometry. - 2.3 Energy State of Water in Soil. - 2.3.1 Potential Energy of Water in Soil. - 2.3.2 Reference or Standard State. - 2.3.3 Total Soil Water Potential. - 2.3.4 Components of Water Potential. - Gravitational Potential. - Solute Potential. - Tensiometer Pressure Potential. - Matric Potential. - Air Pressure Potential. - Hydrostatic Pressure Potential. - Overburden Pressure Potential. - Wetness Potential. - 2.4 Analysis of Systems at Equilibrium. - 2.5 Measurements of Components of Water Potential. - 2.5.1 Direct Measurement of Potential Components. - 2.5.2 Measurement Devices. - Piezometer Tube. - Tensiometer. - Soil Psychrometer. - 2.6 Water Characteristic Function. - 2.6.1 Measurement. - Hanging Water Column. - Pressure Plate. - Equilibration over Salt Solutions. - 2.6.2 Hysteresis in Water Content-Energy Relationships. - 2.7 Appendix: Gamma Ray Attenuation. - 2.7.1 Transmission through a Pure Substance i. - 2.7.2 Transmission through a Heterogeneous Material. - 2.7.3 Transmission through Soil. - Problems. - 3 Water Movement in Soil. - 3.1 Water Flow in Capillary Tubes. - 3.1.1 Poiseuille's Law. - 3.2 Water Flow in Saturated Soil. - 3.2.1 Darcy's Law. - 3.2.2 Measurement of Saturated Hydraulic Conductivity. - 3.2.3 Calculation of Hydrostatic Pressure in Soil Columns. - 3.2.4 Water Flow in Saturated Layered Soil. - 3.3 Water Flow in Unsaturated Soil. - 3.3.1 Buckingham-Darcy Flux Law. - 3.3.2 Unsaturated Hydraulic Conductivity. - 3.3.3 Capillary Tube Model of Unsaturated Hydraulic Conductivity. - 3.3.4 Steady-State Water Flow Problems. - Integral Form of Darcy's Law. - Evaporation from a Water Table. - Steady-State Downward Water Flow. - Measurement of Unsaturated Hydraulic Conductivity. - 3.3.5 Water Conservation Equation. - 3.3.6 Richards Equation for Transient Water Flow. - Water Content Form of Richards Equation. - Matric Potential Form of Richards Equation. - Water Diffusivity Function Dw([Theta]). - Water Capacity Function Cw([Theta]). - 3.3.7 Model Functional Forms. - 3.3.8 Water Flow Calculations in Unsaturated Soil. - Steady-State Water Flow through a Crop Root Zone. - Water Flow through Unsaturated Layered Soil. - 3.4 Multidimensional Flow. - 3.5 Appendix: Solution of First-Order Ordinary Differential Equations. - 3.5.1 Method 1: Separation of Variables. - 3.5.2 Method 2: Integrating Factors. - Problems. - 4 The Field Soil Water Regime. - 4.1 Field Water Balance. - 4.1.1 Analysis of Field Water Content and Matric Potential Profiles. - 4.1.2 Equilibrium and Steady-State Profiles. - 4.1.3 Transient Flow Processes in the Field. - 4.2 Infiltration. - 4.2.1 Empirical Infiltration Models. - Kostiakov Equation. - Horton Equation. - 4.2.2 Green-Ampt Infiltration Model. - 4.2.3 Philip Infiltration Model. - Horizontal Infiltration. - Vertical Infiltration. - 4.2.4 Infiltration into Nonhomogeneous Soil Profiles. - 4.2.5 Infiltration When RainfallIs Limiting. - 4.2.6 Two- and Three-Dimensional Infiltration. - 4.3 Redistribution. - 4.3.1 Redistribution of Water in Soil Profiles. - 4.3.2 Field Capacity Concept. - 4.4 Field Measurement of Unsaturated Hydraulic Conductivity. - 4.5 Water Flow through Structural Voids. - 4.6 Evaporation. - Problems. - 5 The Soil Thermal Regime. - 5.1 Atmospheric Energy Balance. - 5.1.1 Extraterrestrial Radiation. - Stefan-Boltzmann Law. - Energy-Wavelength Laws. - 5.1.2 Solar Radiation. - Interactions with Atmosphere. - Net Radiation. - 5.1.3 Physical Factors Affecting Solar Radiation. - Albedo. - Latitude. - Exposure. - Distribution of Land and Water. - Vegetation. - 5.2 Soil Surface Energy Balance. - 5.2.1 Energy Balance Equation. - Components of Energy Balance. - 5.2.2 Measurement of Evapotranspiration. - Aerodynamic Transport Equations. - Penman Combination Equation. - 5.3 Heat Flow in Soil. - 5.3.1 Heat Flux Equation. - 5.3.2 Heat Conservation Equation. - 5.3.3 Thermal Properties of Soil. - Heat Capacity. - Thermal Conductivity. - Measurement of Thermal Conductivity. - 5.3.4 Applications of Heat Flow Equation. - Steady-State Heat Flow Problems. - Annual Temperature Changes in Soil. - 5.3.5 Soil Temperature Observations. - Diurnal Variations. - Annual Variations. - Problems. - 6 Soil Aeration. - 6.1 Composition of Soil Air. - 6.2 Gas Reactions In Soil. - 6.2.1 CO2 Production in Soil. - 6.2.2 O2 Consumption in Soil. - 6.3 Gas Transport through Soil. - 6.3.1 Gas Conservation Equation. - 6.3.2 Gas Convection in Soil. - Temperature Effects. - Barometric Pressure Effects. - Wind Effects. - Rainfall Effects. - Mass Flow of Gases into Buildings. - 6.3.3 Gas Diffusion. - Measurement of Gas Diffusion Coefficients in Soil. - Measurement of Gas Flux in Field. - 6.3.4 Gas Transport Equation. - 6.4 Gas Transport Modeling in Soil. - 6.4.1 Steady-State O2 Transport and Consumption. - 6.4.2 Steady-State and Transient CO2 Transport and Evolution. - 6.4.3 O2 Depletion at the Plant Root Interface. - 6.5 Flow of Water Vapor through Soil. - 6.5.1 Water Vapor Flux Equation. - 6.5.2 Approximate Water Vapor Flux Law. - 6.6 Measurement of O2 Diffusion and Consumption in Soil. - Problems. - 7 Solute Transport in Soil. - 7.1 Solute Conservation Equation. - 7.1.1 Solute Storage in Soil. - 7.1.2 Solute Flux through Soil. - 7.1.3 Convection-Dispersion Model of Hydrodynamic Dispersion. - 7.2 Convection-Dispersion Equation. - 7.2.1 Transport of Inert, Nonadsorbing Solutes. - Breakthrough Time. - Effect of Dispersion. - Drainage Breakthrough Curves. - Transport of Pulses through Soil. - 7.2.2 Transport of Inert, Adsorbing Chemicals. - Adsorption Isotherms. - Breakthrough Time. - Effect of Dispersion. - 7.2.3 Effect of Soil Structure on Transport. - Mobile-Immobile Water Model. - 7.2.4 Reactions of Chemicals in Soil. - First-Order Decay. - Convection-Dispersion Equation and First-Order Decay. - Piston Flow Model and First-Order Decay. - 7.2.5 Transport of Volatile Organic Compounds through Soil. - Phase Partitioning Laws. - Linear Partitioning Laws. - Effective Liquid-Vapor Diffusion. - Total Solute Flux. - Volatilization of Chemicals from Soil. - 7.3 Transfer Function Model of Solute Transport through Soil. - 7.3.1 Solute Transport Volume. - 7.3.2 Solute Lifetime and Travel Time Distribution Functions. - 7.3.3 Transfer Function Equation. - 7.3.4 Measurement of Transfer Function Parameters. - 7.3.5 Model Distribution Func