Soil Health MCQs (Quiz 17)

Soil Health MCQs (Quiz 17)
Multiple Choice Questions for Professional Test Preparation

1. Waterlogged soils are harmful to crop plants mainly because they reduce ___________

 Oxygen availability in the root zone

 Mineral particle size

 Sunlight exposure

 Organic matter content

2. Plants experiencing nutrient imbalance often show __________

 Enhanced flowering in all cases

 Stunted growth and poor productivity

 Complete resistance to stress

 Improved metabolic efficiency

3. In coarse soils, biochar mainly helps by ___________

 Reducing microbial activity

 Eliminating organic matter

 Increasing the soil’s ability to hold moisture

 Blocking water infiltration

4. Among the essential plant nutrients, ____________ is highly prone to leaching in over-irrigated or sandy soils

 Nitrogen

 Phosphorus

 Iron

 Potassium

5. Bulk density considered an important soil health indicator because ________________

 It measures atmospheric carbon dioxide directly

 It reflects soil compaction, porosity, root growth potential, and water movement

 It determines soil color changes only

 It is unrelated to soil physical properties

6. Crops deficient in phosphorus often show poor __________.

 Root and shoot growth

 Flower color

 Leaf size

 Stem thickness

7. Potassium plays a major role in regulating plant __________

 Root pigmentation

 Leaf shape

 Seed color

 Water balance and stress tolerance

8. Adding lime to soil generally causes soil pH to __________

 Remain unchanged

 Decrease rapidly

 Become neutral in all cases

 Increase

9. Excessive reliance on chemical fertilizers alone can gradually decrease soil __________

 Rock fragments

 Biological activity and structure

 Particle density

 Natural drainage channel formation

10. Which material is commonly used to make biochar?

 Glass waste

 Synthetic rubber

 Steel fragments

 Crop residues and wood biomass

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