Soil Classification Quiz Chapter 4
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Questions and Answers

What is the main reason for classifying soils into class II?

  • One necessary limitation (correct)
  • High available water capacity
  • Very severe erosion hazard
  • Shallow soil depth

    • What management practice is essential for class III soils with erosion issues?

  • Cover cropping
  • Intensive irrigation
  • Terracing and strip-cropping (correct)
  • Moderate erosion control

    • Which of the following characteristics is typical of class IV soils?

  • Good for regular cultivation
  • Low water table conditions
  • Very severe limitations (correct)
  • Moderate slope (6 to 10 percent)

    • How does soil depth affect the classification of soils into class III?

    <p>Soils with depth less than 20 inches may be less productive</p> Signup and view all the answers

    What is a critical factor for managing soils in class I?

    <p>The lack of any limitations</p> Signup and view all the answers

    What slope range is generally associated with class IV soils?

    <p>10 to 15 percent</p> Signup and view all the answers

    Which condition indicates that drainage might be an issue for class III soils?

    <p>Saturation features within 20 inches of the surface</p> Signup and view all the answers

    What type of soil might be included in class III due to low water capacity?

    <p>Coarse-textured soils with very low capacity</p> Signup and view all the answers

    What percentage of an average soil sample is typically composed of minerals?

    <p>45 to 50 percent</p> Signup and view all the answers

    Which soil particle size is the largest?

    <p>Sand</p> Signup and view all the answers

    What are the small spaces between mineral particles in soil known as?

    <p>Pores</p> Signup and view all the answers

    Which type of pore allows for rapid air and water movement in soil?

    <p>Macropores</p> Signup and view all the answers

    What is the main characteristic of silt particles?

    <p>Feel like flour when dry</p> Signup and view all the answers

    What percentage of organic matter is typically found in an average soil sample?

    <p>0 to 5 percent</p> Signup and view all the answers

    What is the main role of micropores in soil?

    <p>Restricting water movement to slow capillary action</p> Signup and view all the answers

    What characteristic defines clay particles?

    <p>Smaller than 0.002 mm and usually sticky when wet</p> Signup and view all the answers

    What impact does applying lime have on soil conditions?

    <p>It raises soil pH and improves microbiotic activity.</p> Signup and view all the answers

    How does the needle litter from coniferous trees affect soil decomposition?

    <p>It slows down decomposition and acidifies the soil.</p> Signup and view all the answers

    What role does organic matter play in soil structure when combined with lime?

    <p>It is crucial for well-developed soil structure.</p> Signup and view all the answers

    What is the primary purpose of a soil survey report?

    <p>To describe, classify, map, and provide information about soils.</p> Signup and view all the answers

    Which factor is NOT mentioned as affecting the decomposition of coniferous litter?

    <p>Nutrient content</p> Signup and view all the answers

    Where can detailed soil maps typically be found in a soil survey report?

    <p>At the back of the soil survey or loose in the folder.</p> Signup and view all the answers

    Which section should be consulted for information about a specific soil series?

    <p>Classification of the Soils section.</p> Signup and view all the answers

    What is the result of more nutrient-rich hardwood litter in relation to soil fauna?

    <p>It facilitates incorporation into the mineral soil by soil fauna.</p> Signup and view all the answers

    What type of humus is formed through the mixing of organic matter from hardwood litter and mineral soil?

    <p>Mull humus</p> Signup and view all the answers

    What is the primary purpose of the Munsell Soil Color Chart?

    <p>To help identify soil color uniformly</p> Signup and view all the answers

    What is a limitation of general soils maps?

    <p>They cannot be used for detailed management of farms or buildings.</p> Signup and view all the answers

    What kind of information do soil survey reports generally contain?

    <p>Technical information on physical and chemical properties of soils.</p> Signup and view all the answers

    How does the process of litter fall influence nutrient cycling in the soil?

    <p>It enhances nutrient cycling from subsoil to vegetation and back to soil surface.</p> Signup and view all the answers

    Under which lighting condition is it best to use the Munsell Soil Color Chart?

    <p>Natural lighting</p> Signup and view all the answers

    Which of the following is true regarding the availability of soil surveys in North Carolina?

    <p>Most counties have either a published soil survey or one in progress.</p> Signup and view all the answers

    What adverse effect does the by-products of conifer decomposition have on soil organisms?

    <p>It leads to increased acidification of the soil.</p> Signup and view all the answers

    What color is typically associated with soils high in organic matter?

    <p>Black or very dark brown</p> Signup and view all the answers

    Which elements can actively influence the color of soil?

    <p>Iron and manganese</p> Signup and view all the answers

    What information can be found at the beginning of the soil survey report?

    <p>Descriptions of the county's general nature, relief, drainage, and climate.</p> Signup and view all the answers

    What is generally indicated by bright red soils?

    <p>High amounts of iron and good drainage</p> Signup and view all the answers

    What does the soil legend in a detailed soil map indicate?

    <p>The meanings of map symbols used in the map.</p> Signup and view all the answers

    Why might soils in wetland areas require additional pages in the Munsell Soil Color Chart?

    <p>They possess different color variations.</p> Signup and view all the answers

    What specific color characteristic does manganese contribute to soil?

    <p>Brown or black color</p> Signup and view all the answers

    What is the role of iron oxides in soil coloration?

    <p>They contribute yellowish, brownish, or reddish colors.</p> Signup and view all the answers

    What type of deposit is characterized by windblown silts originating from river flood plains?

    <p>Loess deposits</p> Signup and view all the answers

    Which type of organic deposit consists of identifiable portions of organic matter?

    <p>Peat</p> Signup and view all the answers

    What is the primary source of glacial till?

    <p>Material deposited when glaciers retreated</p> Signup and view all the answers

    Which statement accurately describes loess-derived soils?

    <p>They can slide under stress and flow when wet.</p> Signup and view all the answers

    What type of volcanic material is primarily carried by the wind during an eruption?

    <p>Volcanic ash</p> Signup and view all the answers

    Which of the following describes glacial outwash?

    <p>Coarse material washed away by glacial meltwater</p> Signup and view all the answers

    In which areas are organic soils commonly found in North Carolina?

    <p>Coastal Plain</p> Signup and view all the answers

    What main feature distinguishes volcanic deposits from other types of soil deposits?

    <p>The occurrence of materials ejected during volcanic eruptions</p> Signup and view all the answers

    Study Notes

    Soils Resource Manual - High School

    • This manual provides information about soil for high school students.
    • It was revised in August 2023 and updated on 8/27/24.
    • It covers five key concepts: Soil Genesis, Soil Ecology, Soil Properties, Soil Classification, and Soil Conservation and Management.

    Key Concept 1: Soil Genesis

    • What is Soil?
    • Soil Forming Factors
    • Soil Forming Processes

    Key Concept 2: Soil Ecology

    • Nutrient Cycles
    • Energy Transfer
    • Energy Flow
    • Soil Ecosystem

    Key Concept 3: Soil Properties

    • Soil Physical Properties
    • Water Movement in Soils
    • Soil Chemical Properties
    • Soil Horizons

    Key Concept 4: Soil Classification

    • Soil Surveys
    • Land Capability Classification
    • Applications
    • Soil Recycling

    Key Concept 5: Soil Conservation and Management

    • Erosion
    • Problems Facing Farmers
    • Best Management Practices
    • Importance of Soils

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    High School Soil Study Guide PDF

    Description

    Test your knowledge on soil classification with this quiz focused on Class II through Class IV soils and their management practices. Explore crucial aspects like soil depth, drainage issues, and particle sizes that define these classes. Perfect for students studying soil science or environmental management.

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