Soil Health MCQs (Quiz 5)

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

1. Plant-available water in soil refers to ________________

 Water that is completely unavailable to plants

 Water held below the permanent wilting point

 Water lost as surface runoff

 Water retained in soil that can be absorbed by plant roots

2. The rhizosphere is the area of soil found _____________

 Beneath groundwater layers

 Inside rocks

 Around plant roots

 Above the atmosphere

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

 The same infiltration rate regardless of texture

 Lower infiltration rate due to smaller pores

 Higher infiltration rate due to larger pore spaces

 No relationship between texture and infiltration

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

 Reducing water infiltration into soil

 Increasing evaporation from the soil surface

 Enhancing soil water retention

 Suppressing plant root systems

5. Regenerative agriculture mainly helps the environment by _______________

 Reducing crop diversity

 Improving soil health

 Increasing soil degradation

 Expanding desert areas

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

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

 The visual appearance of the soil surface after tillage

 The total amount of fertilizer applied to the soil each year

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

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

 Faster breakdown of existing soil organic matter

 Reduction in soil moisture

 Complete prevention of decomposition

 Increase in soil salinity

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

 Electroplating

 Remote sensing

 DNA sequencing

 Microscopy

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

 Mineral-associated organic carbon

 Dissolved organic carbon

 Fresh plant litter

 Surface crop residues

10. Soil health assessments are designed to evaluate ______________________

 Plant height

 Atmospheric pressure changes

 Overall soil condition and functioning

 Rock formation

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