Soil erosion
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Soil Erosion. What is soil erosion?. A natural process of soil moving from one place to another. Why is erosion a problem?. Removes valuable resource. Pollutes water and waterways. Types of soil erosion. Splash Raindrops dislodging and detaching soil. Destroys granulation.

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Soil Erosion

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Soil Erosion


What is soil erosion?

  • A natural process of soil moving from one place to another.


Why is erosion a problem?

  • Removes valuable resource.

  • Pollutes water and waterways.


Types of soil erosion

  • Splash

    • Raindrops dislodging and detaching soil.

    • Destroys granulation.


Types of soil erosion

  • Sheet

    • The removal of soil from the surface of an area in thin layers.

    • Occurs on smooth surfaces.

    • Slow (often goes unnoticed).


Types of soil erosion

  • Rill

    • The formation of many shallow trenches by the movement of water.


Types of soil erosion

  • Gully

    • A process where water accumulates in narrow channels and removes the soil from these narrow areas (leaving gullies).


What can we do toprevent soil erosion?

  • There are 6 major practices to prevent soil erosion:

    • No-Till

    • Contour Strip Cropping

    • Terraces

    • Field Windbreak

    • Cover Crop

    • Grass Waterway


No-Till

  • A planting method which the field is left almost undisturbed.

  • Plant materials are left on top of the soil, rather than tilled in.


Contour Strip Cropping

  • Growing crops that require different types of tillage in alternating strips along a contour.

  • Slows water runoff.

  • Used to conserve soil and water.

  • Can reduce soil erosion by as much as 50%.


Terraces

  • Earth structure built across the slope to hold water.


Field Windbreak

  • A strip of trees or shrubs planted to reduce wind erosion and trap blowing snow.


Cover Crop

  • Green plants plowed under for the purpose of building soil (AKA green manure).


Grass Waterway

  • Strips of land permanently seeded to grass.

  • Controls water runoff from sloping land.

  • Best results when used with strip cropping.


Diversion


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