Practice Test Geeks(CFP) Certified Fisheries Professional Practice Test
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Soil Science & Analysis Flashcards

7 cards from real CFP practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.

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  1. Which particle size fraction of soil is most responsible for contributing to turbidity problems in fish ponds?

    Answer: Clay (<0.002 mm)

    Clay particles are colloidal and remain suspended in the water column for extended periods, causing chronic turbidity in ponds.

  2. When evaluating soil for pond embankment construction, the plasticity index (PI) is important because it indicates:

    Answer: The workability and cohesion of clay-rich soils when wet

    The plasticity index measures the range of water content over which soil behaves plastically, critical for assessing embankment material workability.

  3. Soil organic matter primarily benefits pond productivity by:

    Answer: Serving as a slow-release nutrient source and improving water retention

    Organic matter decomposes to release nutrients like nitrogen and phosphorus and improves soil water-holding capacity, supporting pond productivity.

  4. The Proctor compaction test is used in fisheries pond construction to determine:

    Answer: Maximum dry density and optimum moisture content for embankment compaction

    The Proctor test establishes the optimal moisture content and maximum density achievable through compaction, guiding embankment construction.

  5. Which soil classification system uses twelve texture classes defined by percentages of sand, silt, and clay, and is commonly used in agricultural and fisheries soil surveys?

    Answer: USDA soil texture triangle system

    The USDA texture triangle classifies soils into 12 classes (e.g., loam, sandy clay) based on sand, silt, and clay percentages.

  6. A pond manager observes that aluminum toxicity is limiting plankton growth. This condition is most likely to occur in soils with:

    Answer: Low pH (<5.5) where aluminum becomes soluble and bioavailable

    At pH below 5.5, aluminum solubility increases dramatically, releasing toxic Al³⁺ ions into pond water that inhibit plankton and plant growth.

  7. Loss-on-ignition (LOI) is a soil analysis method used to estimate:

    Answer: Soil organic matter content

    LOI burns off organic material at high temperature; the mass lost represents organic matter content of the soil sample.