Soil Health MCQs (Quiz 6)

Soil Health MCQs (Quiz 6)
Multiple Choice Questions for Professional Test Preparation

1. Which combination of indicators is commonly used in modern soil health evaluation?

 Physical, chemical, and biological properties

 Soil color and texture alone

 Wind speed, rainfall, and sunlight

 Fertilizer type

2. Microbial diversity in soil is important because microorganisms help in _________________

 Reducing all soil moisture

 Organic matter complete depletion

 Preventing plant growth

 Nutrient cycling and decomposition

3. The main goal of sustainable soil management is to ____________

 Remove all soil organisms

 Protect and improve soil health

 Reduce crop productivity

 Increase soil pollution

4. In soil microbiology, carbon use efficiency describes how effectively microbes ________________

 Produce rocks in soil

 Remove all soil nutrients

 Increase soil salinity

 Convert carbon into biomass

5. A soil scientist compares two fields. Field A has a high diversity of earthworm species, mites, springtails, and arbuscular mycorrhizal fungi. Field B has few visible organisms and low microbial diversity. Which conclusion is most supported by these observations?

 Field A likely has higher soil biodiversity and better biological soil functioning

 Field A must have higher fertilizer application rates

 Field B has a more stable soil structure due to lack of disturbance

 Soil pH is the primary factor limiting crop growth in Field A

6. Which organism helps improve soil fertility by decomposing organic matter?

 Butterfly

 Termite

 Earthworm

 Mosquito

7. Hyperspectral imaging is useful in soil studies because it can ________________

 Measure underground earthquakes directly

 Detect variations in soil properties using reflected light spectra

 Replace all field sampling methods

 Eliminate soil erosion completely

8. Plants mainly obtain water from ____________

 Soil water available within the rhizosphere

 Deep bedrock layers

 Surface runoff water

 Water vapor in the atmosphere

9. Through the process of photosynthesis and subsequent humus formation, healthy soils act as a net sink for which greenhouse gas?

 Nitrous oxide, through denitrification in anaerobic microsites

 Carbon dioxide, via incorporation of plant-derived carbon into stable organic matter

 Ozone, through stomatal uptake and root storage

 Methane, by methanotrophic bacteria in aerobic soils

10. Soil microorganisms are most primarily affected by changes in ____________________

 Soil pH

 Soil color

 Plant method

 Soil leveling

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