Soil Health MCQs (Quiz 3)

Soil Health MCQs (Quiz 3)
Multiple Choice Questions for Professional Test Preparation

1. Which statement best explains the relationship between soil health and ecosystem services?

 Healthy soils support multiple interconnected ecosystem functions and services

 Soil health affects only agricultural crop yield

 Ecosystem services function independently of soil biology

 Soil health has no connection to environmental sustainability

2. Earthworms are best described as _________

 Plant pathogens

 Bioindicators of soil health

 Soil pollutants

 Plant growth regulators

3. Which of the following best defines sustainable soil management?

 Maintaining soil productivity and health for future generations

 Ignoring biodiversity and ecosystem balance

 Excessive use of chemical inputs without monitoring

 Practices that rapidly degrade soil quality

4. Which of the following is a reliable direct indicator of high soil biodiversity?

 An absence of visible soil organisms under a hand lens

 Presence of multiple earthworms, mites, and soil biota in the rhizosphere

 A strong ammonia-like odor immediately after heavy rainfall

 A uniform, dark color throughout the soil profile

5. Which combination of practices would most effectively increase soil organic carbon over a 5-year period under regenerative management?

 Conventional tillage + cover cropping + synthetic fungicides

 Rotational tillage + bare fallow periods + high NPK application

 Minimum till planting + diverse crop rotation + integrated livestock grazing

 Heavy irrigation + monoculture cash crops + annual liming

6. Why is regenerative agriculture considered a climate-smart practice?

 It decreases biodiversity in agricultural systems

 It increases dependence on fossil fuels

 It promotes carbon storage and ecosystem resilience

 It removes natural vegetation from farmland

7. Soils with extreme acidity or alkalinity generally show _____________

 Complete absence of organic matter

 Reduced growth of many microorganisms

 Higher rock formation rates

 Increased microbial diversity in all cases

8. Which remote sensing technique is increasingly used for large-scale soil health monitoring?

 MRI scanning

 Hyperspectral imaging

 X-ray diffraction

 Ultrasonic imaging

9. The “priming effect” in soil science refers to _____________

 Stabilization of organic matter in soil

 Increased decomposition of native soil organic matter after the addition of fresh carbon

 Soil alkalization following fertilizer application

 Reduction in microbial biomass in the soil

10. The rhizosphere is best defined as ________________

 The soil region directly influenced by plant roots and associated microorganisms

 An inactive mineral layer lacking biological activity

 Weathered parent rock beneath the soil

 A deep underground groundwater zone

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