Variability of vertical bromide redistribution within hummocky landscape
Bibliographic record
Abstract
Groundwater quality is a major issue for rural communities, and intensive agricultural practices have the potential to contaminate groundwater via leaching. By analysing the movement of a bromide tracer over three slope positions (top, middle and low) within two hummocky landscapes in central Alberta, the intensity of short-term leaching potential was measured, and the accuracy of a leaching potential index was assessed. Concentrations of bromide > 1 mg kg-1 were found at a 120-cm depth at each slope position, from both landscapes, after one snowmelt event and one growing season. However, the depth of a bromide concentration > 100 mg kg-1 varied significantly among slope positions after the snowmelt event, and after the growing season. The leaching potential index successfully distinguished between high leaching potential, and low and very low leaching potential. This index will become a useful tool to determine the variability of leaching within an agricultural landscape. Key words: Soil-landscape, leaching, tracer, soil moisture, soil profile index
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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 | 0.001 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.001 | 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".