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Soil Conservation

Soil Conservation. Video about soil conservation. http://www.youtube.com/watch?v= LSRmFSKBypI. Sod helps to keep soil in place. Soil is a natural resource. Plants depend on the soil for food Humans/animals depend on the plants for food Limited supply of fertile soil

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Soil Conservation

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  1. Soil Conservation

  2. Video about soil conservation • http://www.youtube.com/watch?v=LSRmFSKBypI

  3. Sod helps to keep soil in place

  4. Soil is a natural resource • Plants depend on the soil for food • Humans/animals depend on the plants for food • Limited supply of fertile soil • Soil, esp. fertile, takes a long time to form

  5. Soil Damage and Loss • Causes: • Human activity • Environmental changes

  6. Soil Damage and Loss • Value is lost: • Fertility decreases • Called exhausted • Can happen due to overuse • Can restore by using legumes which supple nitrogen in useable form

  7. Soil Damage and Loss • Topsoil is lost: • Water & wind can quickly erode it • Plants help keep topsoil • Breaking the force of rainfall • Roots holding soil in place • Drought dries out plants and soils are blown away (unless precautions)

  8. Loss due to human activity Over farming and strip mining

  9. Topsoil lost due to wind

  10. Topsoil lost due to water

  11. Topsoil lost due to rainfall

  12. Topsoil kept because of plant roots

  13. Topsoil lost due to drought, plants die, nothing to hold the soil

  14. Contour Plowing Plow along curves of a slope Slows runoff of rainfall Prevents washing away of soil

  15. Conservation plowing Low till/no-till Disturb soil & plant cover little Dead weeds & stalks are left behind Return soil nutrients Retain moisture Hold soil in place

  16. Crop Rotation Plant different types crops to limit depletion of nutrients 1st Cotton/Corn 2nd oats/barley/rye 3rd legumes (alfalfa or beans)

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