Soil Composition Quiz

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Questions and Answers

What is the main source of energy for soil organisms?

  • Soil air
  • Mineral soil
  • Organic soil (correct)
  • Soil water

Which type of soil increases the ability of soil to resist drastic pH changes?

  • Soil water
  • Soil air
  • Organic soil
  • Mineral soil (correct)

What occupies the pore spaces in the soil that are not occupied by water?

  • Organic soil
  • Mineral soil
  • Soil air (correct)
  • Soil water

Which gas is a principal component of atmospheric air but not a significant component of soil air?

<p>Oxygen (O2) (C)</p> Signup and view all the answers

What function does soil serve as a building material for roads and highways?

<p>Foundation material (B)</p> Signup and view all the answers

Which type of soil contains less than 20% organic carbon by weight?

<p>Mineral soil (B)</p> Signup and view all the answers

What is one of the major functions of soil mentioned in the text?

<p>Absorbing domestic and industrial wastes (A)</p> Signup and view all the answers

How does soil support plant growth according to the text?

<p>By supplying water, air, and mechanical support to plant roots (D)</p> Signup and view all the answers

What role does soil play in the production of household structures?

<p>Supplying construction materials like clay (C)</p> Signup and view all the answers

How do plant nutrients become available in the soil for plant growth?

<p>They are released from minerals and organic matter to exchangeable sites (B)</p> Signup and view all the answers

What dictates the nature of vegetation and types of animals in a particular area?

<p>Properties of the soil (A)</p> Signup and view all the answers

Apart from plants, which living organisms help in improving soil structure and fertility?

<p>Micro-organisms, reptiles, and mammals (D)</p> Signup and view all the answers

What is the function of soil as a natural resource?

<p>Medium for plant growth (A)</p> Signup and view all the answers

Which branch of soil science focuses on the study of soil nutrients and their availability for plant growth?

<p>Soil Chemistry and Mineralogy (B)</p> Signup and view all the answers

What does Soil Genesis, Morphology, and Classification primarily deal with?

<p>Origin and structure of soils (C)</p> Signup and view all the answers

In what way does soil act as a building material?

<p>By forming the foundation for buildings (C)</p> Signup and view all the answers

What aspect of soil does Soil Physics primarily focus on?

<p>Physical forces acting on the soil (A)</p> Signup and view all the answers

What is the main purpose of Soil Fertility in soil science?

<p>Study of nutrient availability for plant growth (C)</p> Signup and view all the answers

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