Erosion

Card Set Information

Author:
jenfox
ID:
77159
Filename:
Erosion
Updated:
2011-04-03 23:37:24
Tags:
Erosion
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Description:
Erosion
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  1. Each year, how many tons of soil wash or blow from farmlands in the US?
    2 million
  2. How many tons of soil lost is due to water erosion?
    1.2 billion
  3. Much improvement is attributed to removal of over 36 million acres of erodible land from cultivation, entered into what program in 1985?
    Conservation Reserve Program
  4. A major effect of a shrinking root zone?
    Reduced water holding capacity
  5. A Conservation Foundation study of 1985 estimated that what percent of American waters are exposed to enough runoff to chronically affect fish?
    30 percent
  6. Eroded soil reduces the ability of streams to carry water resulting in what?
    Increased flooding
  7. Three steps that water takes to erode soil
    Detachment, transport and deposition
  8. What is the direct movement of soil by splashing?
    Splash erosion
  9. Running water carves out small but visible channels called what?
    Rills
  10. The average soil loss to water erosion on cropland per acre per year?
    3.5 tons

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