Soil Formation and Composition

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Questions and Answers

What is the process of transporting soil material from upper layers to lower levels through downward precipitation of water?

  • Eluviation (correct)
  • Illuviation
  • Weathering
  • Leaching

What is the layer of soil that differs in color and texture from the layers above or below it?

  • Soil Horizon (correct)
  • Regolith
  • Soil Profile
  • Bedrock

What is the process of depositing leached material in lower soil layers?

  • Eluviation
  • Weathering
  • Illuviation (correct)
  • Leaching

What type of soil is characterized by intense weathering, red color, and acidic properties?

<p>Oxisol (A)</p> Signup and view all the answers

What is the term for the blanket of soil and loose rock fragments overlying the bedrock due to weathering?

<p>Regolith (C)</p> Signup and view all the answers

How many factors influence soil formation?

<p>5 (D)</p> Signup and view all the answers

What characterizes spodosol soils?

<p>Coarse texture and leaching potential (D)</p> Signup and view all the answers

What is a major consequence of soil degradation?

<p>Loss of soil's ability to support plant growth (B)</p> Signup and view all the answers

What is the primary function of vegetation in soil conservation?

<p>To hold soil in place (A)</p> Signup and view all the answers

What is the term for a group of populations of different species living in the same area?

<p>Ecological community (C)</p> Signup and view all the answers

What type of soils form in wetland areas?

<p>Histosols (A)</p> Signup and view all the answers

What is the approximate annual rate of soil loss worldwide?

<p>25-75 trillion kilos (A)</p> Signup and view all the answers

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