Soil Health MCQs (Quiz 9)

Soil Health MCQs (Quiz 9)
Multiple Choice Questions for Professional Test Preparation

1. Why is microbial carbon use efficiency important in soil carbon cycling studies?

 It eliminates decomposition processes completely

 It influences soil carbon storage and greenhouse gas emissions

 It determines soil color

 It regulates only inorganic minerals in soil

2. Why is hyperspectral imaging considered valuable for large-scale soil health monitoring?

 It completely replaces soil microorganisms in analysis

 It provides rapid, non-destructive, and spatially extensive soil analysis

 It only works in laboratory conditions

 It measures soil texture through sound waves

3. Earthworms are considered “natural ploughs” because they ______________

 Improve soil aeration and mixing

 Produce chemical nutrients

 Inhibits harmful bacteria

 Increase soil compaction

4. The rhizosphere plays a major role in sustainable agriculture because it ___________________

 Prevents all microbial activity in soil

 Reduces root growth intentionally

 Eliminates the need for soil nutrients

 Enhances nutrient cycling and plant–microbe interactions

5. A study compares two farms. Farm X has high aggregate stability, high mycorrhizal colonization, and low nitrate leaching. Farm Y has the opposite. Which farm is likely practicing regenerative agriculture?

 Farm Y

 Neither

 Farm X

 Both Farms X and Y

6. Sustainable soil management helps agriculture by _______________

 Eliminating all microorganisms in soil

 Promoting water loss from farmland

 Increasing soil erosion

 Maintaining long-term soil fertility and ecosystem stability

7. Which factor most directly contributes to the priming effect in soils?

 Increased soil compaction

 Decrease in oxygen availability

 Loss of soil texture

 Enhanced microbial activity due to fresh carbon inputs

8. Why is plant-available water important in sustainable agriculture?

 It increases soil erosion

 It only affects soil color changes

 It supports crop growth and improves drought resilience

 It prevents nutrient uptake by roots

9. A major shift in soil pH can lead to ______________

 Elimination of all soil organic matter

 Permanent soil sterilization

 Changes in microbial diversity and nutrient availability

 Immediate formation of new minerals

10. Which soil property is commonly enhanced by biochar application?

 Salt accumulation

 Soil water retention and aeration

 Soil compaction

 Loss of microbial activity

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