Transcription of CHAPTER 1. SOIL PHYSICAL PROPERTIES
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CHAPTER 1. SOIL PHYSICAL PROPERTIES
SSC107-Fall 2000 CHAPTER 1, Page - 1 - CHAPTER 1. SOIL PHYSICAL PROPERTIESC ontents: Soil physics Soil texture Soil surface area Soil structure Volume and mass relationships Water content measurements UnitsSOIL PHYSICS: THE STUDY OF THE STATE AND TRANSPORT OF ALL FORM OFMATTER AND ENERGY IN SOILSJ Why study soil physics ???ATMOSPHEREROOTZONESOIL SURFACEVADOSE ZONE CROPSSTREAMGROUNDWATERSOILS: SOURCE OF NUTRIENTS AND WATER FOR CROP AND PLANT GROWTH CONDUIT BETWEEN SOIL SURFACE AND groundwater ACT AS FILTER AND A BUFFERSSC107-Fall 2000 CHAPTER 1, Page - 2 -Soils are extremely complex, hence we often simplify to study and understand soil physicalprinciples, , soil particles are spherical soil pores are composed of capillary tubes soil is homogeneoussoil particlessoil gassoil waterSOIL SOLID PHASE IS CHARACTERIZED BY SOIL TEXTURE - SIZE DISTRIBUTION OF SOIL PARTICLES CHEMICAL AND MINERALOGICAL PROPERTIES SHAPE AND SURFACE AREA OF SOIL PARTICLES SOIL STRUCTURE - ARRANGEMENT OF INDIVIDUAL SOIL PARTICLESSoil texture:SSC10
GROUNDWATER SOILS: • SOURCE OF NUTRIENTS AND WATER FOR CROP AND PLANT GROWTH ... • Chemical adsorption of contaminants and nutrients, both in liquid and gas phase. SSC107-Fall 2000 Chapter 1, Page - 5 - Soil’s specific surface area (s, m2/g): Depends on shape of soil particle. For example, if spherical (r = radius and ρ = density) ...
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