Concentration and Distribution of Phosphorus Species in Marginal Land Soils
Bibliographic record
Abstract
This research focused on soil leachable and total P from three selected Ontario fields (London, Simcoe and Ottawa), of which one is agricultural land (London) as a reference in 2019. Leachable P was obtained through leaching soil with an acidified water solution and analyzed using colorimetric method. Total P was obtained through microwave acid digestion and analyzed using ICP-OES. There was little to no statistical difference in both P fractions when comparing between urea fertilizer applications, sorghum hybrids or over sorghum growth periods. Ottawa and Simcoe soil leachable P has variable correlation with the total P in each respective depth but didn’t match the correlation found in London soil. Leachable P was strongly related to biomass yield in London and urea applied Simcoe field but not in Ottawa field. The correlation difference between Ottawa and Simcoe soil can be due to tile drainage and soil textures allowing different P movement.
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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 | 0.001 | 0.001 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.001 | 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".