Soil Health MCQs (Quiz 13)

Soil Health MCQs (Quiz 13)
Multiple Choice Questions for Professional Test Preparation

1. Which statement best summarizes the ecological significance of soil?

 Soil has little influence on ecosystem sustainability

 Soil ecosystems are independent of biological activity

 Soil serves only as a physical base for buildings and roads

 Soil functions as a dynamic living system that supports biodiversity, nutrient cycling, water regulation, and ecosystem productivity

2. High bulk density in soil usually means the soil is ___________

 Completely saturated with water

 More acidic

 More compacted

 Rich in plant diversity

3. Healthy root development depends on proper __________ in the growing medium (e.g., soil)

 Clay contents

 Adequate salt ions

 Moisture and aeration balance

 Metal concentration

4. Which of the following is the most direct and common consequence of phosphorus deficiency in plants?

 Leaves turn dark green or purplish-red

 Fruits become sweeter than normal

 Changes in stem flexibility

 Poor root growth and energy transfer

5. Gypsum is widely used soil amendment primarily improve ______________

 Soil color

 Soil compaction and drainage

 Soil acidity

 Soil organic matter

6. Poor soil aeration primarily affects plants by limiting ___________

 Photosynthesis in leaves

 Seed color development

 Root respiration and nutrient uptake

 Water absorption by stems

7. The stage of plant growth that benefits most from vermiculite use is ____________

 Ripening stage

 Reproductive stage

 Seed germination

 Grain filling

8. Vermiculite is most useful for plants that need ______________

 Desert conditions

 Waterlogged soil

 Consistent moisture

 Limited root aeration

9. Organic soil amendments mainly help by ___________

 Lowering water retention

 Destroying beneficial organisms

 Increasing salinity levels

 Improving soil organic matter content

10. Excessive nitrogen application in crops often results in __________

 Improved drought tolerance due to deeper roots

 Increased soil pH uniformly across all soil types

 Reduced pest attacks from hardened plant tissues

 Lush and succulent vegetative growth with increased susceptibility to pests

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