Soil Science 1

30 Questions | Total Attempts: 2567

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Soil Science 1

A basic quiz covering the first few chapters of a soil science textbook.


Questions and Answers
  • 1. 
    Although subsoil is more difficult to obtain, it is generally equally as good as topsoil for landscaping purposes.
    • A. 

      True

    • B. 

      False

  • 2. 
    Which of the following pH values represents a neutral condition?
    • A. 

      5.0

    • B. 

      1.0

    • C. 

      6.0

    • D. 

      10

    • E. 

      7.0

  • 3. 
    The lithosphere is made up of ____________.
    • A. 

      Air

    • B. 

      Rock

    • C. 

      Plants and animals

    • D. 

      Water

    • E. 

      All of the above

  • 4. 
    Which statement is false about the ability we have to change the soil?
    • A. 

      Mineral make up is relatively unchangeable.

    • B. 

      Soil texture is relatively changeable.

    • C. 

      Soil structure is relatively changeable.

    • D. 

      Organic matter content is relatively changeable.

  • 5. 
    Adsorption is the attraction of ions to the surface of particles.
    • A. 

      True

    • B. 

      False

  • 6. 
    Most (usually 80% or more) of soil potassium and calcium can be found in the form of __________.
    • A. 

      Structural components of minerals

    • B. 

      Exchangeable ions

    • C. 

      Organic compounds

    • D. 

      Dissolved substances

  • 7. 
    In a load of 10 cubic meters of topsoil, approximately how many cubic meters of the volume would be solid material?
    • A. 

      1

    • B. 

      2.5

    • C. 

      4

    • D. 

      5

    • E. 

      7.5

  • 8. 
    Compared to silt, clay-sized soil particles are characterized by _______.
    • A. 

      Greater proportion of primary minerals

    • B. 

      Greater attraction for water

    • C. 

      Less tendency to form hard clods when dry

    • D. 

      Less capacity to hold nutrients in plant-available forms

  • 9. 
    The water in the soil typically differs from pure water because the soil water _________.
    • A. 

      Is restrained in its flow by attraction to particle surfaces

    • B. 

      Contains organic compounds

    • C. 

      Contains mineral nutrients

    • D. 

      All of the above

    • E. 

      None of the above

  • 10. 
    Increasing the organic matter content of a soil is likely to ___________.
    • A. 

      Increase the soil's water holding capacity

    • B. 

      Decrease the soil's water holding capacity

    • C. 

      Have no effect on water holding capacity

  • 11. 
    • A. 

      Pore space

    • B. 

      Texture

    • C. 

      Structure

    • D. 

      Solution

    • E. 

      Profile

  • 12. 
    Solum occupies the ____________ part of the regolith.
    • A. 

      Lower

    • B. 

      Upper

    • C. 

      Younger

    • D. 

      Both B and C

  • 13. 
    Which of the following is considered to be a plant macronutrient?
    • A. 

      Ca

    • B. 

      N

    • C. 

      P

    • D. 

      S

    • E. 

      All of the above

  • 14. 
    A, B, C, and E horizons can be found in any true soil.
    • A. 

      True

    • B. 

      False

  • 15. 
    Which statement of false about soil air in comparison to atmospheric air?
    • A. 

      Soil air is homogeneous throughout a large region.

    • B. 

      The oxygen content is lower.

    • C. 

      The carbon dioxide content is much higher.

    • D. 

      Soil air has more moisture.

  • 16. 
    Which of the following is an essential plant nutrient?
    • A. 

      Al

    • B. 

      Cu

    • C. 

      Pb

    • D. 

      Sr

    • E. 

      Yr

  • 17. 
    Subsoil is generally equivalent to which soil horizon?
    • A. 

      A

    • B. 

      B

    • C. 

      C

    • D. 

      O

    • E. 

      R

  • 18. 
    A soil profile consists of _____________.
    • A. 

      The set of layers seen in a vertical cross section of a soil

    • B. 

      The sum of chemical and physical data known about a soil

    • C. 

      The boundaries of a particular soil

    • D. 

      The way a soil "feels"

    • E. 

      The general outline of a soil or group of soils when viewed from the side

  • 19. 
    Which of the following pH values represents the most acid condition?
    • A. 

      1.0

    • B. 

      5.55

    • C. 

      7.0

    • D. 

      10

    • E. 

      100

  • 20. 
    Hydroxyl ion concentrations are greatest in a soil solution with a pH value of ______.
    • A. 

      0.1

    • B. 

      4.0

    • C. 

      5.0

    • D. 

      6.5

  • 21. 
    Gram per gram, which material can hold more nutrients for plants?
    • A. 

      Clay

    • B. 

      Humus

    • C. 

      Saprolite

    • D. 

      Silt

  • 22. 
    In a given soil, the horizon with the highest organic matter content is generally the ___ horizon.
    • A. 

      A

    • B. 

      B

    • C. 

      C

    • D. 

      E

    • E. 

      R

  • 23. 
    Which soil-forming process is most repsonsible for the development of B horizons?
    • A. 

      Additions

    • B. 

      Losses

    • C. 

      Transformations

    • D. 

      Translocations

  • 24. 
    Alluvial parent materials are those that have been laid down in former lake bottoms.
    • A. 

      True

    • B. 

      False

  • 25. 
    Silicate clay accumulation is most common in the ___ horizon?
    • A. 

      A

    • B. 

      B

    • C. 

      C

    • D. 

      E

    • E. 

      O

    • F. 

      R

  • 26. 
    Talus slopes and detritus are good examples of which?
    • A. 

      Secondary and tertiary minerals

    • B. 

      Sedimentary rocks

    • C. 

      Colluvium

    • D. 

      Skin conditions of your feet

    • E. 

      Rhyolite

  • 27. 
    The steep, convex portion of a hillslope is called the ____________.
    • A. 

      Backslope

    • B. 

      Summit

    • C. 

      Shoulder

    • D. 

      Toeslope

  • 28. 
    A soil developed in transported parent materials will likely have properties related to the properties of the rock below the C horizon.
    • A. 

      True

    • B. 

      False

  • 29. 
    Physical weathering ___________________.
    • A. 

      Leads to the formation of clay mineral particles

    • B. 

      Increases the surface area of soil minerals

    • C. 

      Releases essential plant nutrients

    • D. 

      Is the result of water mixing with the carbon dioxide respired by plants and microorganisms

  • 30. 
    Alluvium typically results in well developed soil.
    • A. 

      True

    • B. 

      False