Soil Health MCQs (Quiz 14)

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

1. Why is biochar commonly added to sandy soils?

 It increases runoff losses

 It decreases soil porosity

 It lowers nutrient absorption

 It improves water and nutrient retention

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

 Gypsum board

 Limestone

 Elemental sulfur

 Gravel

3. Compost is primarily made of _________

 Pure sand

 Recalcitrant organic matter

 Chemical waste

 Decomposed organic matter

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

 Vermiculite

 Fertilizer

 Concrete powder

 Compost

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

 Inhibits performance of soil biota

 Completely prevents water absorption

 Disrupts normal plant metabolic processes

 Increases soil oxygen levels excessively

6. Bulk density is commonly used to evaluate ________________

 Soil structure and pore space

 Leaf chlorophyll concentration

 Wind erosion

 Atmospheric humidity

7. Immobilization commonly occurs when soil microorganisms ___________

 Release excess nutrients into the air

 Decrease organic matter content

 Convert minerals directly into gases

 Use available nutrients during decomposition

8. 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

 Improved soil structure and aggregation

 Enhanced natural resistance to soil-borne pests

9. Potassium deficiency in plants commonly causes ____________

 Leaf edge scorching and yellowing

 Dark green roots

 Strong stem development

 Rapid fruit enlargement

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

 Soil color

 Water infiltration rate

 Sand percentage

 Earthworm population

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