Soil Organic Matter MCQs Quiz 15

1. How does an increase in soil organic matter (SOM) primarily lead to a decrease in soil bulk density?

2. Increase nutrient retention in soils due to soil organic matter (SOM) occurs primarily through ______________

3. ______________ is a group of microrganisms, primarily used for nitrogen fixation in non-leguminous crops such as wheat and maize

4. Which agricultural practice is most effective for increasing soil carbon sequestration?

5. Sustainable soil management is best achieved by ___________

6. Soil enzyme _____________ is directly involved in the hydrolysis of urea to ammonia and carbon dioxide

7. Soil enzyme activities are most strongly correlated with _________

8. How does soil disturbance (e.g., tillage) typically affect soil organic matter (SOM)?

9. Which soil condition typically favors maximum activity of most hydrolytic enzymes?

10. __________________ is the stable, long-lived fraction of soil organic carbon that is most resistant to microbial decomposition