Soil Organic Matter MCQs Quiz 15

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

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

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

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

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

6. Sustainable soil management is best achieved by ___________

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

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

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

10. Soil enzyme activities are most strongly correlated with _________