Propagation & Canopy Performance Troubleshooting — Formative Check
Answer each item before opening its rationale. Use missed items to identify which lesson evidence you should revisit.
1. Which propagation metric is most interpretable?
- Rooted units divided by the documented eligible starting units at a defined observation time.
- Rooted units with no denominator.
- Only the best tray result.
- A percentage calculated after failed units are removed without reason.
Check answer and rationale
Answer: A. Rooted units divided by the documented eligible starting units at a defined observation time.
Rooted units divided by the documented eligible starting units at a defined observation time.
2. A rooting problem follows one bench position across multiple donors. What should rise in the differential?
- A genotype-only explanation.
- A location-linked environment, handling or sanitation factor.
- A universal nutrient deficiency proven by location.
- The idea that records are unnecessary.
Check answer and rationale
Answer: B. A location-linked environment, handling or sanitation factor.
A location-linked environment, handling or sanitation factor.
3. What evidence best supports canopy uniformity review?
- One center-room image.
- The technique name.
- Mapped, repeatable spatial crop observations tied to the work order and recovery timing.
- Fixture wattage alone.
Check answer and rationale
Answer: C. Mapped, repeatable spatial crop observations tied to the work order and recovery timing.
Mapped, repeatable spatial crop observations tied to the work order and recovery timing.
4. Why should cultivar response be interpreted with flowering stage?
- Stage never affects response.
- Cultivar labels prove causation.
- Stage should be removed from records.
- Stage can change response and confound cultivar comparisons.
Check answer and rationale
Answer: D. Stage can change response and confound cultivar comparisons.
Stage can change response and confound cultivar comparisons.
5. A donor is under quarantine. What principle governs troubleshooting?
- Collect needed evidence without breaking the quarantine/sanitation boundary.
- Move it into clean production for convenience.
- Share tools with clean donors.
- Ignore quarantine if symptoms are mild.
Check answer and rationale
Answer: A. Collect needed evidence without breaking the quarantine/sanitation boundary.
Collect needed evidence without breaking the quarantine/sanitation boundary.
6. What should happen to evidence that conflicts with the leading hypothesis?
- Delete it.
- Preserve and discuss it as part of the uncertainty.
- Change it to match the conclusion.
- Exclude it without documentation.
Check answer and rationale
Answer: B. Preserve and discuss it as part of the uncertainty.
Preserve and discuss it as part of the uncertainty.
7. Why stratify propagation results by donor or batch?
- To guarantee a genotype diagnosis.
- To remove low-performing groups.
- To reveal localized performance patterns that an aggregate rate can hide.
- To avoid using denominators.
Check answer and rationale
Answer: C. To reveal localized performance patterns that an aggregate rate can hide.
To reveal localized performance patterns that an aggregate rate can hide.
8. What is a discriminating check?
- Any additional observation regardless of relevance.
- A treatment performed before verification.
- A rewritten production record.
- A check whose result changes the ranking of plausible causes.
Check answer and rationale
Answer: D. A check whose result changes the ranking of plausible causes.
A check whose result changes the ranking of plausible causes.
9. Why record planned-versus-actual canopy work?
- Because performance review requires knowing what was authorized and what was actually done.
- Because the technique name is never recorded.
- Because all work orders are identical.
- Because outcomes can be judged without crop observations.
Check answer and rationale
Answer: A. Because performance review requires knowing what was authorized and what was actually done.
Because performance review requires knowing what was authorized and what was actually done.
10. One cycle shows a cultivar difference. What is the safest interpretation?
- Declare genotype causation.
- Treat genotype as a hypothesis until repeated or better-controlled evidence separates it from stage and environment.
- Ignore environment.
- Alter cultivar identity to match response.
Check answer and rationale
Answer: B. Treat genotype as a hypothesis until repeated or better-controlled evidence separates it from stage and environment.
Treat genotype as a hypothesis until repeated or better-controlled evidence separates it from stage and environment.
11. What should happen when plant-health risk is plausible but unconfirmed?
- Declare zero risk.
- Release questionable material automatically.
- Maintain appropriate containment and document the evidence and confirmation needed.
- Erase the observations.
Check answer and rationale
Answer: C. Maintain appropriate containment and document the evidence and confirmation needed.
Maintain appropriate containment and document the evidence and confirmation needed.
12. A high-risk intervention is outside assigned authority. What is the correct response?
- Perform it if confidence is high.
- Change the work order.
- Leave no record of the recommendation.
- Escalate with the evidence and recommendation instead of performing it independently.
Check answer and rationale
Answer: D. Escalate with the evidence and recommendation instead of performing it independently.
Escalate with the evidence and recommendation instead of performing it independently.