High School

8. An example of PHYSICAL health indicator is:
A. Bulk density.
B. Soil pH.
C. Earthworm population.

9. An example of CHEMICAL soil health indicator is:
A. Bulk density.
B. Soil pH.
C. Earthworm population.

10. An example of BIOLOGICAL health indicator is:
A. Bulk density.
B. Soil pH.
C. Earthworm population.

11. Fertility status of a soil is related to-
A. Presence of soil organic matter and essential nutrients.
B. Soil texture and pH.
C. Both A and B.

12. Which soil health domain includes microbial biomass and earthworm counts?
A. Physical.
B. Chemical.
C. Biological.

13. The soil pH at which most essential nutrients are available for plant uptake is:
A. Acidic.
B. Neutral.
C. Alkaline.

14. Soil water status below which plants will permanently die is-
A. Saturation.
B. Field capacity.
C. Permanent wilting point.

15. Liming is used to correct soil acidity.
A. True
B. False

16. Soil health can be fully assessed by measuring a single property such as soil pH.
A. True
B. False

Answer :

Let's go through the questions one by one:

  1. An example of a PHYSICAL health indicator is:

    • Correct answer: A. Bulk density.
    • Explanation: Physical indicators of soil health include properties like bulk density, which measures the compactness of the soil and affects roots' ability to penetrate.

  2. An example of a CHEMICAL soil health indicator is:

    • Correct answer: B. Soil pH.
    • Explanation: Chemical indicators include properties such as soil pH, which indicates the acidity or alkalinity of the soil and affects nutrient availability.

  3. An example of a BIOLOGICAL health indicator is:

    • Correct answer: C. Earthworm population.
    • Explanation: Biological indicators include the presence and activity of organisms like earthworms, which reflect soil life and fertility.

  4. Fertility status of a soil is related to:

    • Correct answer: C. Both A and B.
    • Explanation: Soil fertility is influenced by organic matter, essential nutrients (A), as well as by soil texture and pH (B).

  5. Which soil health domain includes microbial biomass and earthworm counts?

    • Correct answer: C. Biological.
    • Explanation: The biological domain of soil health includes living organisms like microbes and earthworms, whose presence and activity indicate soil health.

  6. The soil pH at which most essential nutrients are available for plant uptake is:

    • Correct answer: B. Neutral.
    • Explanation: Most nutrients are optimally available to plants when the soil pH is near neutral (around pH 6-7).

  7. Soil water status below which plants will permanently die is:

    • Correct answer: C. Permanent wilting point.
    • Explanation: The permanent wilting point is the soil moisture level below which plants cannot recover from wilting.

  8. Liming is used to correct soil acidity.

    • Correct answer: A. True.
    • Explanation: Liming raises soil pH and can reduce acidity by adding calcium and magnesium, helping to improve soil structure and nutrient availability.

  9. Soil health can be fully assessed by measuring a single property such as soil pH.

    • Correct answer: B. False.
    • Explanation: Soil health is complex and involves multiple physical, chemical, and biological factors. A comprehensive assessment would look at various properties instead of just one like soil pH.

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