Soil Organic Matter MCQs Quiz 15

1. Sustainable soil management is best achieved by ___________

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

3. Soil enzyme activities are most strongly correlated with _________

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

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

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

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

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

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

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