MCQs Soil Science-52

1. What is the primary mechanism by which soil organic matter enhances soil nutrient retention?

 
 
 
 
 

2. Phosphorus (P) precipitation, along with limited plant availability in soil with high pH, is mainly attributed to ___________?

 
 
 
 

3. _________ rocks are formed from the cooling and crystallization of magma deep within the Earth’s crust

 
 
 
 

4. Which of the following practices can reduce evaporation and increase infiltration?

 
 
 
 

5. ________________ does NOT significantly affect the bioavailability of toxic chemicals

 
 
 
 
 

6. How can heavy metal-contaminated soil be improved?

 
 
 
 

7. __________ is a soil particle that feels powdery to the touch when dry

 
 
 
 

8. Exchangeable and soluble metal ions in soils are termed as _________

 
 
 
 

9. During which geologic time did Earth form and undergo its early development?

 
 
 
 

10. Macronutrients are required in large amounts and normally constitute __________ of a plant’s dry weight

 
 
 
 

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