Soil Health MCQs (Quiz 5)

Soil Health MCQs (Quiz 5)
Multiple Choice Questions for Professional Test Preparation

1. The rhizosphere is the area of soil found _____________

 Above the atmosphere

 Beneath groundwater layers

 Around plant roots

 Inside rocks

2. ________________ is considered the most stable carbon pool, persisting in the soil for decades to centuries

 Dissolved organic carbon

 Mineral-associated organic carbon

 Surface crop residues

 Fresh plant litter

3. Which technology is commonly used to observe soil conditions from satellites or aircraft?

 Remote sensing

 Electroplating

 Microscopy

 DNA sequencing

4. A soil has 60% sand, 30% silt, and 10% clay (Soil A). Compared to a clay soil (Soil B), soil A will typically have ___________________

 Lower infiltration rate due to smaller pores

 Higher infiltration rate due to larger pore spaces

 The same infiltration rate regardless of texture

 No relationship between texture and infiltration

5. Which best describes “soil health” in an agricultural field?

 The percentage of sand, silt, and clay in the soil

 The soil’s ability to function as a living ecosystem that sustains plants, animals, and humans

 The total amount of fertilizer applied to the soil each year

 The visual appearance of the soil surface after tillage

6. Plant-available water in soil refers to ________________

 Water retained in soil that can be absorbed by plant roots

 Water that is completely unavailable to plants

 Water lost as surface runoff

 Water held below the permanent wilting point

7. Biochar improves soil water-holding capacity mainly by _____________

 Reducing water infiltration into soil

 Increasing evaporation from the soil surface

 Suppressing plant root systems

 Enhancing soil water retention

8. In soil science, the priming effect is mainly associated with ____________

 Reduction in soil moisture

 Faster breakdown of existing soil organic matter

 Increase in soil salinity

 Complete prevention of decomposition

9. Regenerative agriculture mainly helps the environment by _______________

 Expanding desert areas

 Increasing soil degradation

 Reducing crop diversity

 Improving soil health

10. Soil health assessments are designed to evaluate ______________________

 Rock formation

 Overall soil condition and functioning

 Atmospheric pressure changes

 Plant height

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