Soil Chemical Properties MCQs (Quiz 7)

1. Soil acidification primarily results from an increase in _______

 Hydrogen ions

 Carbonates

 Base cations

 Hydroxyl ions

2. Leaching primarily removes _______ from the soil profile

 Soil organic matter

 Bound nutrients fixed in soil minerals

 Soluble nutrients beyond the root zone

 Structural soil particles

3. Soil pollution affects crop quality by _______

 Improving nutrients

 Introducing toxins

 Increasing yield

 Reducing water

4. Ecosystem services provided by soil include _______

 Water filtration

 Carbon storage

 Nutrient cycling

 All of these

5. Erosion leads to loss of _______

 Soil structure

 All of these

 Nutrients

 Organic matter

6. Calcium replaces sodium on _______ in sodic soils

 Soil solution water molecules

 Plant root surfaces

 Air-filled pore spaces

 Cation exchange sites on soil particles

7. The calcium in gypsum primarily functions to _______

 Lower cation exchange capacity

 Promote soil acidification

 Displace exchangeable sodium

 Increase hydrogen ion concentration

8. Volcanic emissions contribute to soil acidification primarily through the release of _______

 Silicates

 Carbonates

 Sulfur compounds

 Calcium salts

9. In soil application of biochar contributes to _______

 Carbon sequestration

 Water loss

 Nutrient loss

 Carbon loss

10. Salinity affects plants mainly through _______

 Nutrient deficiency

 Osmotic stress

 Temperature stress

 Mechanical stress

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