Soil Health MCQs (Quiz 14)

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

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

 Increases soil oxygen levels excessively

 Inhibits performance of soil biota

 Completely prevents water absorption

 Disrupts normal plant metabolic processes

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

 Sand percentage

 Earthworm population

 Water infiltration rate

 Soil color

3. Bulk density is commonly used to evaluate ________________

 Atmospheric humidity

 Wind erosion

 Soil structure and pore space

 Leaf chlorophyll concentration

4. Why is biochar commonly added to sandy soils?

 It lowers nutrient absorption

 It decreases soil porosity

 It increases runoff losses

 It improves water and nutrient retention

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

 Elemental sulfur

 Limestone

 Gravel

 Gypsum board

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

 Concrete powder

 Compost

 Vermiculite

 Fertilizer

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

 Permanent and stable nutrient balance in soil

 A decline in soil microbial activity and diversity

 Enhanced natural resistance to soil-borne pests

 Improved soil structure and aggregation

8. Compost is primarily made of _________

 Chemical waste

 Pure sand

 Recalcitrant organic matter

 Decomposed organic matter

9. Immobilization commonly occurs when soil microorganisms ___________

 Convert minerals directly into gases

 Decrease organic matter content

 Release excess nutrients into the air

 Use available nutrients during decomposition

10. Potassium deficiency in plants commonly causes ____________

 Dark green roots

 Strong stem development

 Leaf edge scorching and yellowing

 Rapid fruit enlargement

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