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Soil cec

Quiz by Mark Burchell

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16 questions
Show answers
  • Q1
    What does the term 'cation exchange capacity' (CEC) in soils refer to?
    The pH level of the soil
    The amount of water soil can retain
    The quantity of organic matter in soil
    The ability of soil to hold and exchange cations
    30s
  • Q2
    Which type of soil typically has the highest cation exchange capacity (CEC)?
    Clay soil
    Loamy soil
    Silt soil
    Sand soil
    30s
  • Q3
    Which factors can influence the cation exchange capacity (CEC) of soil?
    Elevation and rainfall
    Temperature and wind
    Soil color and drainage
    Soil texture and organic matter content
    30s
  • Q4
    How does the presence of organic matter affect the cation exchange capacity (CEC) of soil?
    It has no effect on CEC
    It only affects soil pH
    It decreases CEC
    It generally increases CEC
    30s
  • Q5
    What is the relationship between soil pH and cation exchange capacity (CEC)?
    CEC is only affected by soil texture, not pH
    Soil pH has no impact on CEC
    Soil pH can influence CEC, with higher pH generally increasing CEC
    Lower pH always increases CEC
    30s
  • Q6
    Which nutrient is NOT typically associated with cation exchange capacity (CEC) in soils?
    Potassium
    Phosphate
    Magnesium
    Calcium
    30s
  • Q7
    What effect does soil compaction have on cation exchange capacity (CEC)?
    It only affects water retention
    It generally decreases CEC
    It increases CEC
    It has no effect on CEC
    30s
  • Q8
    Which of the following practices can help improve the cation exchange capacity (CEC) of sandy soils?
    Applying chemical fertilizers
    Irrigating frequently
    Adding organic matter
    Reducing crop rotation
    30s
  • Q9
    What type of cation is typically held more strongly by soils with high cation exchange capacity (CEC)?
    Sodium ions (Na⁺)
    Calcium ions (Ca²⁺)
    Phosphate ions (PO₄³⁻)
    Nitrate ions (NO₃⁻)
    30s
  • Q10
    Which soil condition can lead to a decrease in cation exchange capacity (CEC)?
    Increased organic matter
    High clay content
    High salinity levels
    Frequent crop rotation
    30s
  • Q11
    Which cation is commonly associated with nutrient deficiency in soils with low cation exchange capacity (CEC)?
    Calcium
    Sulfur
    Sodium
    Chlorine
    30s
  • Q12
    Why is high cation exchange capacity (CEC) beneficial for plant growth?
    It allows soils to retain and supply more nutrients to plants.
    It enhances soil drainage.
    It reduces soil compaction.
    It increases soil pH levels.
    30s
  • Q13
    How does organic matter improve the cation exchange capacity (CEC) of soil?
    By decreasing soil moisture.
    By increasing soil temperature.
    By creating more binding sites for cations.
    By reducing soil particle size.
    30s
  • Q14
    What is the primary consequence of low cation exchange capacity (CEC) in sandy soils?
    Higher soil fertility.
    Inability to retain nutrients effectively.
    Increased soil compaction.
    High water retention capacity.
    30s
  • Q15
    Which nutrient is typically held most effectively by soils with high cation exchange capacity (CEC)?
    Potassium
    Nitrogen
    Phosphorus
    Iron
    30s

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