Question 124·Hard·Rhetorical Synthesis
While researching a topic, a student has taken the following notes:
- Environmental scientists Lisa Tiemann and Sheryl Halpern investigated soil microbial communities in urban gardens located in three different US cities.
- The scientists compared soil from raised beds in community gardens with soil from adjacent city parks.
- Raised-bed soils showed higher microbial diversity and greater nitrogen cycling activity than nearby park soils.
- In gardens older than five years, microbial diversity was especially high, regardless of city.
- The scientists conclude that raised-bed gardening practices enrich soil health over time.
The student wants to summarize the study’s results for a report. Which choice most effectively uses relevant information from the notes to accomplish this goal?
For rhetorical synthesis note-summary questions, first identify the study’s comparison and list the key results stated in the notes. Choose the option that includes all major results (without adding absolute words like “only”) and places qualifying details (like a time effect) with the specific finding they modify.
Hints
Include the comparison
The notes compare raised-bed community garden soils with soil from adjacent city parks—an effective summary should reflect that comparison.
Make sure both main findings appear
Two outcomes are reported as higher in raised beds: microbial diversity and nitrogen cycling activity. Prefer an option that includes both.
Use the age detail accurately
The “older than five years” detail is tied to microbial diversity being especially high; avoid choices that attach that detail to other results or add words like “only.”
Step-by-step Explanation
Identify what an effective results summary must include
The best choice should accurately combine the key comparison (raised-bed garden soils vs. nearby park soils) with the main reported results, without adding unsupported limits or omitting major findings.
Pull the key results from the notes
From the notes:
- Raised-bed garden soils were compared with adjacent park soils.
- Raised-bed soils had higher microbial diversity and greater nitrogen cycling activity.
- In gardens older than five years, microbial diversity was especially high (regardless of city).
Eliminate choices that add unsupported qualifiers, deny a result, or omit a major finding
Reject choices that (a) claim the age effect applies only under conditions not stated, (b) deny the nitrogen-cycling difference, or (c) leave out nitrogen cycling entirely.
Select the choice that matches all notes most precisely
Choice A includes the comparison, both main outcomes (diversity and nitrogen cycling), and the time detail specifically tied to microbial diversity. Therefore, the correct answer is:
Tiemann and Halpern found that raised-bed community garden soils had greater microbial diversity and nitrogen cycling activity than nearby park soils, and that microbial diversity was especially high in gardens more than five years old.