Soil Health MCQs (Quiz 14)

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

1. Potassium deficiency in plants commonly causes ____________

 Leaf edge scorching and yellowing

 Rapid fruit enlargement

 Strong stem development

 Dark green roots

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

 Disrupts normal plant metabolic processes

 Increases soil oxygen levels excessively

 Completely prevents water absorption

 Inhibits performance of soil biota

3. Immobilization commonly occurs when soil microorganisms ___________

 Convert minerals directly into gases

 Use available nutrients during decomposition

 Release excess nutrients into the air

 Decrease organic matter content

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

 Enhanced natural resistance to soil-borne pests

 Improved soil structure and aggregation

 Permanent and stable nutrient balance in soil

 A decline in soil microbial activity and diversity

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

 Compost

 Vermiculite

 Fertilizer

 Concrete powder

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

 Earthworm population

 Soil color

 Sand percentage

 Water infiltration rate

7. Why is biochar commonly added to sandy soils?

 It improves water and nutrient retention

 It decreases soil porosity

 It increases runoff losses

 It lowers nutrient absorption

8. Compost is primarily made of _________

 Chemical waste

 Pure sand

 Decomposed organic matter

 Recalcitrant organic matter

9. Bulk density is commonly used to evaluate ________________

 Soil structure and pore space

 Leaf chlorophyll concentration

 Wind erosion

 Atmospheric humidity

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

 Limestone

 Gypsum board

 Gravel

 Elemental sulfur

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