Some observations on the effects of length of sample storage, sample type, and sample depth on the determination of pH in soils collected in the vicinity of the Horne smelter at Rouyn-Noranda, Quebec
Bibliographic record
Abstract
As a routine part of laboratory practice, soil pH is commonly measured several months after sample collection. To determine the effect of sample storage time on soil pH, samples were analyzed the same day as collection, and in the laboratory at one, two, and six months after collection. The samples were collected as part of the Metals in the Environment (MITE) research at Rouyn-Noranda, Quebec. The pH of A-, B-, or C-horizon soils did not change with storage time, although the pH of humus was less acidic by 0.65 six months after collection. The pH of humus and A-horizon soils collected from sites underlain by clay are less acidic than sites underlain by till, whereas B- and C-horizon samples have a similar pH for samples underlain by clay or till. In general soils become less acidic with depth.
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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 | 0.010 | 0.022 |
| Meta-epidemiology (narrow) | 0.001 | 0.001 |
| Meta-epidemiology (broad) | 0.000 | 0.001 |
| Bibliometrics | 0.001 | 0.002 |
| Science and technology studies | 0.002 | 0.001 |
| Scholarly communication | 0.001 | 0.000 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.001 | 0.001 |
| Insufficient payload (model declined to judge) | 0.002 | 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".