T18+Slides

T18+Slides - A nation that destroys its soils, destroys...

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1 A nation that destroys its soils, destroys itself! F.D. Roosevelt, 1937 "The history of every nation is eventually written in the way in which it cares for its soil" FDR Air Quality Soil Quality H 2 O Quality Food Quality Erosion Degrades Soil quality Water quality Air quality Food quality Global Erosion Statistics Water Erosion 2/3 Wind Erosion 1/3 Global Cost: $400 billion USA Cost: $44 billion Water Erosion Wind Erosion
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2 Water Erosion Wind Erosion Geologic Erosion Due to natural processes Accelerated Erosion Increased erosion rates due to human activities Sheet Erosion Rill & Gully Erosion
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3 Factors affecting water erosion Texture of topsoil Structure Organic matter Infiltration/permeability rate Slope percent and length Soil cover Measuring Water Erosion Rates Rain Drop Impact Importance of Soil Cover Terraces and Cover Crops Terraces
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4 Erosion Associated with Irrigation Soil Cover Rangeland Water Erosion Protecting Roadcuts Gully Erosion often requires large detention dams
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T18+Slides - A nation that destroys its soils, destroys...

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