Yield and Quality of Crisphead Lettuce Cultivated on Organic or Mineral Soils
Bibliographic record
Abstract
ABSTRACT A 2-year experiment was conducted to determine the potential for crisphead lettuce production on mineral soils compared to the production on organic soils of Quebec, during the warmest period of the season when quality often decreases. For each soil type, there were three experimental sites and two planting dates. For each soil type by site by planting date combination, three varieties, ‘Ithaca’, ‘Emperor’ and ‘Salinas 88’ were tested within four blocks. Transplanting occurred from 11 to 28 June 1999, and from 11 June to 5 July 2000, and harvest was from 21 July to 5 August 1999, and from 27 July to 10 August 2000. Lettuce on organic soils matured 4 to 7 days earlier and generally produced larger and heavier, firmer and more uniform heads. Soil type did not affect percentage of heads with the physiological disorders rib blight and tipburn. ‘Ithaca’ produced large, heavy and very firm heads, particularly on organic soil. Although this variety showed tolerance to bolting, it was susceptible to rib ...
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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".