Row Covers to Delay or Advance Maturity in Highbush Blueberry
Bibliographic record
Abstract
SUMMARY A wide variety of hardy highbush blueberry (Vaccinium corymbosum L.) cultivars are suitable for cultivation in parts of North-Eastern Canada, and especially Nova Scotia's Annapolis Valley (latitude 45 EN). The object of this research was to investigate the potential to expand late market opportunities for exported fruit from northern areas by using a combination of controlled atmosphere (CA) storage and in-field row covers to delay fruit maturity in two cultivars (‘Bluegold’ and ‘Brigitta’), and to advance maturity in the cultivar ‘Elliott’, that normally matures too late for full harvest at this latitude. Covering ‘Blue-gold’ and ‘Brigitta’ with 50% shading from time of fruit set to harvest delayed full harvest by about 2.5 weeks in the first year. Yield decreases were recorded in the 2nd year of covering suggesting that covering with this density may diminish long-term yield potential. Fruit quality following after 6 weeks of CA storage (10% CO2, 16% O2, 0°C) was not affected by shading and after 42 days of storage fruit showed very little decay. Decay increased substantially after 63 days of storage. A removable row cover (6 mil polyethylene) advanced maturity in ‘Elliott’ in the first year by between 10 and 14 days, but this advancement was not repeated in the second season. In the first year, covering the crop only until petal drop was nearly as effective as covering throughout the season. Yield from covered plants was increased about 25% in the first year as compared with the controls, but this increase was not realized in the second year. ‘Elliott’ fruit from all treatments stored successfully for up to 42 days, and up to 63 days in control plants; fruit from covered plants showed a 30% decline in marketability when subjected to an additional 7 days in air at 7°C following 63 days in CA.
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How this classification was reachedexpand
Full frame machine prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. The Gemma side is a direct model label for every work in the frame, read from the title-only record. The Codex side is a classifier learned from the 10,348 direct Codex labels and calibrated to design-weighted sample rates; fields without enough sample support carry no Codex call. Candidate is the union of the two sides; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels.
Distilled classifier scores by category (both heads)
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 0.000 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.000 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.001 | 0.000 |
Machine scores (provisional)
The two teacher heads of the student model, read on this work. A score orders the frame for review; it never asserts a category, and the validation status ships verbatim with every row.
Baseline scores from an immature model (maturity gate not passed, 7 training rounds). Scores rank; they never assert a category.
score_only:v0-immature-baseline · verbatim from the scoring run: score_only means the number may rank works, and no category label ships from itClassification
machine, unvalidatedMachine predicted; a candidate call from one source (direct Gemma or distilled Codex), not a consensus.
How this classification was reached, model by model and score by score, is at the end of the page under "How this classification was reached".