Soil Health MCQs (Quiz 7)

Soil Health MCQs (Quiz 7)
Multiple Choice Questions for Professional Test Preparation

1. Which of the following combinations best serves as a direct indicator of high soil biodiversity, rather than just a single component?

 High bulk density and low water infiltration rate

 High richness of invertebrate and microbial taxa, along with a wide range of functional groups

 High total microbial biomass and acidic pH

 High abundance of one dominant earthworm species and low fungal activity to retain organic matter

2. A high microbial carbon use efficiency generally indicates _________________

 More carbon retained in microbial biomass

 Complete absence of respiration

 Greater soil erosion

 Reduced microbial activity

3. ___________________ is most vulnerable soil carbon pool to rapid microbial decomposition

 Fresh plant litter

 Deep subsoil carbon

 Humified stable carbon

 Mineral-associated organic carbon

4. Which process mainly occurs in the rhizosphere?

 Formation of igneous rocks

 Long-term groundwater storage

 Interaction between plant roots, soil, and microorganisms

 Complete absence of nutrient exchange

5. The addition of fresh plant residues to soil may stimulate microorganisms to _____________

 Stop nutrient cycling

 Eliminate soil carbon completely

 Increase decomposition of older organic matter

 Reduce enzyme activity

6. One important benefit of adding biochar to soil is _____________-

 Improved water retention

 Reduced soil fertility

 Restricted use by microorganisms

 Increased soil erosion due to poor soil aggregation

7. One major benefit of regenerative agriculture is its ability to _________________

 Capture and store atmospheric carbon in soil

 Increase greenhouse gas emissions

 Reduce organic matter in soil

 Eliminate all insects from farms

8. A farmer practicing regenerative agriculture notices compacted soil on a grazing paddock. Which action best aligns with regenerative principles?

 Deep plow the field to break up compaction immediately

 Apply synthetic nitrogen fertilizer to boost plant growth

 Introduce high-density, short-duration rotational grazing

 Leave the paddock fallow for two full growing seasons

9. Mineral-associated organic carbon is highly stable because it _______________________

 Exists only in dry soils

 Prevents all microbial activity

 Is protected through interactions with soil minerals

 Decomposes immediately after formation

10. Plant-available water is generally found between __________________

 Saturation point and runoff level

 Bedrock and groundwater table

 Field capacity and permanent wilting point

 Soil crust and surface litter

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