11soils - Soils I. Soil Components II. Soil Properties...

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1 1 Soils I. Soil Components II.Soil Properties III.Soil Nutrients IV.Soil Water V.Soil Profile VI.Soil-Forming Factors VII.Soil Classification 2 I. Soil Components Solid components: about 50% solid 3 I. Soil Components Pore Spaces: about 50% •Air •Water 4 I. Soil Components 5 II. Soil Properties: Texture Texture: relative proportion of sand, silt, and clay Sand>silt>clay 6 II. Soil Properties: Texture Sand and silt : •broken-up rocks •not very active chemically 7 II. Soil Properties: Texture Clay : •Altered chemically •Very fine particles •Chemically active 8 II. Soil Properties: Texture 9 II. Soil Properties: Texture Larger particles Æ larger pore spaces Æ good drainage, lots of air space, little water Smaller particles Æ smaller pore spaces Æ poor drainage, good water-holding capacity Sand Clay
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2 10 II. Soil Properties: Texture Loam: soil with a good mix of sand, silt and clay 11 12 II. Soil Properties: Structure Structure: aggregation of soil particles into larger units Structure affects: •Aeration •Infiltration •Water Retention
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This note was uploaded on 04/21/2008 for the course GEOL 101 taught by Professor Jeeze during the Winter '08 term at San Diego State.

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11soils - Soils I. Soil Components II. Soil Properties...

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