Nutrient Cycling MCQs (Quiz 7)

1. Which of the following is NOT a weathering agent?

2. Nitrogen-fixing bacteria convert atmospheric nitrogen gas (N₂) into _______________, is then readily used by plants

3. Which of the following essential plant nutrients is primarily derived from the weathering of apatite rock?

4. In nutrient cycling, weathering is important because it _______________

5. Carbonation is particularly important in the weathering of ________________

6. In ecology, a nutrient budget is best defined as ________________________________________

7. Where is the primary reservoir of phosphorus in the sedimentary phosphorus cycle?

8. Under aerobic conditions, plants absorb nitrogen mainly in the form of __________________

9. Which nutrient is most susceptible to leaching from agricultural soils?

10. Denitrification returns nitrogen to the atmosphere in which form?