Soil Physical Properties

Soil Physical Properties - 1 Soil Physical Properties...

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1 1 Soil Physical Properties Color, Texture, Structure, Density, Porosity 2 Soil color – Munsell system Hue Value Chroma 3 4 Soil Texture 5 Soil Separates… • Gravel, Cobbles: >2 mm • Sand: 0.05-2 mm • Silt: 0.002-0.05 mm • Clay: <0.002 mm 6 Sand • “Skeletal” part of soil • Inherited from PM – Primary minerals • Low surface area/unit weight • Low WHC • High hydraulic conductivity • Grittiness, abrasive • Low chemical activity • Noncohesive 7 Clay • Smallest mineral particles • Mobile in soils (eluviation, illuviation) • Secondary minerals • Very high surface area/unit weight • Chemically very active • High WHC • Low hydraulic conductivity • Hard when dry • Plastic, sticky, slippery when wet • Cohesive 8 Silt • Intermediate size, properties
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2 • Mostly primary minerals, some secondary • Intermediate surface area • Noncohesive • Erodible by wind and water 9 Erosion of silty soils by water western Iowa
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This note was uploaded on 04/03/2008 for the course SS 121 taught by Professor Staff during the Winter '07 term at Cal Poly.

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Soil Physical Properties - 1 Soil Physical Properties...

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