Soil Health MCQs (Quiz 13)

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

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

 Seed germination

 Ripening stage

 Grain filling

 Reproductive stage

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

 Soil serves only as a physical base for buildings and roads

 Soil ecosystems are independent of biological activity

 Soil has little influence on ecosystem sustainability

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

3. Gypsum is widely used soil amendment primarily improve ______________

 Soil color

 Soil organic matter

 Soil compaction and drainage

 Soil acidity

4. Excessive nitrogen application in crops often results in __________

 Reduced pest attacks from hardened plant tissues

 Improved drought tolerance due to deeper roots

 Lush and succulent vegetative growth with increased susceptibility to pests

 Increased soil pH uniformly across all soil types

5. Organic soil amendments mainly help by ___________

 Lowering water retention

 Increasing salinity levels

 Improving soil organic matter content

 Destroying beneficial organisms

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

 Clay contents

 Adequate salt ions

 Moisture and aeration balance

 Metal concentration

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

 More acidic

 Rich in plant diversity

 Completely saturated with water

 More compacted

8. Vermiculite is most useful for plants that need ______________

 Limited root aeration

 Waterlogged soil

 Consistent moisture

 Desert conditions

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

 Leaves turn dark green or purplish-red

 Poor root growth and energy transfer

 Changes in stem flexibility

 Fruits become sweeter than normal

10. Poor soil aeration primarily affects plants by limiting ___________

 Seed color development

 Root respiration and nutrient uptake

 Photosynthesis in leaves

 Water absorption by stems

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