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

 Fertilizer type

 Soil color and texture alone

 Wind speed, rainfall, and sunlight

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

 Produce rocks in soil

 Remove all soil nutrients

 Convert carbon into biomass

 Increase soil salinity

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

 Increase soil pollution

 Remove all soil organisms

 Protect and improve soil health

 Reduce crop productivity

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

 Plant method

 Soil pH

 Soil color

 Soil leveling

5. 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

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

 Termite

 Earthworm

 Mosquito

 Butterfly

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

 Methane, by methanotrophic bacteria in aerobic soils

 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

8. 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

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

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

 Field A must have higher fertilizer application rates

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

 Organic matter complete depletion

 Nutrient cycling and decomposition

 Preventing plant growth

 Reducing all soil moisture

10. Plants mainly obtain water from ____________

 Water vapor in the atmosphere

 Surface runoff water

 Soil water available within the rhizosphere

 Deep bedrock layers

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