Course Content
Learn Principles of Agronomy — B.SC agriculture
About Lesson

i) Damage to soil:

  • There is loss of a siltly or sandy surface soil and the leaving of heavy clay layer exposed at the surface.
  • Under such conditions, erosion severely damages the soil, because of the heavy clay layer may not contain enough aeration porosity to support a good crop.

ii) Soil loss:

  • The soil lost through water erosion is usually the most fertile, containing the plant nutrients, humans, and any fertilizers that the farmer has applied.
  • Millions of tons of fertile surface soil can be lost forever if it is washed into the sea.
  • What is left is less productive and may become completely barren.

iii) Water erosion depletes water supplies:

  • As the vicious circle of erosion proceeds, less water percolates into the soil to feed underground supplies.
  • Spring marshes and streams dry up more quickly and this leads to further erosion.
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