Soil Health MCQs (Quiz 14)

Soil Health MCQs (Quiz 14)
Multiple Choice Questions for Professional Test Preparation

1. Which soil property is most directly associated with biological activity in healthy soil?

 Earthworm population

 Water infiltration rate

 Soil color

 Sand percentage

2. Which amendment is most suitable for correcting alkaline soils?

 Gravel

 Gypsum board

 Elemental sulfur

 Limestone

3. Immobilization commonly occurs when soil microorganisms ___________

 Release excess nutrients into the air

 Convert minerals directly into gases

 Decrease organic matter content

 Use available nutrients during decomposition

4. Nutrient imbalance in soil can reduce crop yield primarily because it __________

 Inhibits performance of soil biota

 Increases soil oxygen levels excessively

 Completely prevents water absorption

 Disrupts normal plant metabolic processes

5. Which of the following materials is a naturally occurring mineral used in potting mixes?

 Concrete powder

 Fertilizer

 Vermiculite

 Compost

6. Bulk density is commonly used to evaluate ________________

 Soil structure and pore space

 Wind erosion

 Atmospheric humidity

 Leaf chlorophyll concentration

7. Compost is primarily made of _________

 Recalcitrant organic matter

 Pure sand

 Chemical waste

 Decomposed organic matter

8. Continuous use of chemical fertilizers without organic matter may lead to __________

 Enhanced natural resistance to soil-borne pests

 A decline in soil microbial activity and diversity

 Permanent and stable nutrient balance in soil

 Improved soil structure and aggregation

9. Why is biochar commonly added to sandy soils?

 It increases runoff losses

 It improves water and nutrient retention

 It lowers nutrient absorption

 It decreases soil porosity

10. Potassium deficiency in plants commonly causes ____________

 Dark green roots

 Rapid fruit enlargement

 Leaf edge scorching and yellowing

 Strong stem development

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