Types of Soils and Soil Horizons

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Questions and Answers

Which Roman numeral indicates soils with few limitations that only require good soil management practices?

  • I (correct)
  • III
  • II
  • IV

What is the appropriate conservation practice necessary for Class II soils?

  • Very careful management
  • No conservation practices required
  • Moderate conservation practices (correct)
  • Intensive conservation practices

Which capability class indicates very severe limitations that require very careful management or perennial vegetation?

  • IV (correct)
  • II
  • III
  • I

What type of land use is classified under Capability Class V?

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

Which subclass indicates soil groups within a capability class?

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

What is the primary method suggested for correcting sodic soils in the text?

<p>Applying gypsum and growing sodic tolerant crops (A)</p> Signup and view all the answers

What does 'Leached' refer to in the context of soil management?

<p>Certain elements washed out of the soil (D)</p> Signup and view all the answers

Which soil particle is the largest in size?

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

What does 'Residual Soil' refer to in the context of soil classification?

<p>Parent material formed in place (B)</p> Signup and view all the answers

What is the significance of 'Capability Class' in soil management?

<p>Indicating the most intensive but safe land use (D)</p> Signup and view all the answers

What does 'Colluvial Deposit' describe in relation to soil formation?

<p>Soils deposited by gravity (C)</p> Signup and view all the answers

What is the main characteristic of the O horizon in soil?

<p>Consists of organic matter (B)</p> Signup and view all the answers

What is the function of 'Topsoil' in supporting plant growth?

<p>Desirable proportion of plant nutrients, chemicals, and living organisms located near the surface (C)</p> Signup and view all the answers

Which soil horizon is generally referred to as subsoil?

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

Which capability subclass is mainly limited by the risk of erosion?

<p>e - Erosion (D)</p> Signup and view all the answers

What is the main characteristic of the topsoil in soil?

<p>Supports good plant growth (C)</p> Signup and view all the answers

What is the main characteristic of deep soils compared to shallow soils?

<p>Higher yields (B)</p> Signup and view all the answers

In which capability class are soils unsuitable for cultivation due to very severe limitations?

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

Which class indicates that soils nearly prevent their use for commercial plants?

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

What is the significance of the C horizon in soil?

<p>Important for storing and releasing water (D)</p> Signup and view all the answers

What is the main limitation of capability subclass c?

<p>Shallow, droughty or stony soil (A)</p> Signup and view all the answers

What is the primary function of subsoil in soil composition?

<p>Consists of large chunky soil structure (C)</p> Signup and view all the answers

Which class is best suited for wildlife and recreation?

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

Which land classification has moderate restrictions for cultivation, hay, and woodland?

<p>Class VI (B)</p> Signup and view all the answers

What percentage of the soil composition consists of solids?

<p>50% (D)</p> Signup and view all the answers

Which type of soil particles is the smallest in size?

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

What is the main benefit of organic matter in soil?

<p>Supplies nitrogen and nutrients to plants (D)</p> Signup and view all the answers

What is the texture of fine-textured (clay) soil when dry?

<p>Forms very hard lumps or clods (A)</p> Signup and view all the answers

Which type of soil forms aggregates mainly held together by organic matter?

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

What type of deposits are soils that are transported by streams called?

<p>Alluvial deposits (B)</p> Signup and view all the answers

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