Phosphorus Fractions in Sodic Soils of the Great Ethiopian Rift Valley Soils as Affected by Reclamation
Bibliographic record
Abstract
Soil phosphorus (P) availability is commonly assumed to limit productivity in tropical soils, yet there is relatively little information on the chemical forms of soil P in such ecosystems. The study was conducted to determine the size P pools via application of gypsum. We used a sequential fractionation to assess P fractions. The average total P concentration was 519 mg kg−1. Soil organic P was relatively low (74 mg kg−1). The ratio of organic carbon to organic P was generally greater than 298, suggesting the potential for immobilization. Calcium-associated P was the dominant inorganic P pool, whereas Al+Fe-P was the second dominant. Readily available P was very low (1.3 mg kg−1). Gypsum at different level was used as a reclamation material for sodic soils, and application of gypsum significantly affected the different P fractions. Organic P forms were significantly lower for higher levels of gypsum application.
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How this classification was reachedexpand
Full frame distilled prediction
Teacher imitationNot calibrated prevalence, not ground truth. Human validation pending. Learned from the 10,348 direct Codex labels and 10,348 direct Gemma labels. Candidate is the union of thresholded teacher heads; consensus is their intersection. These outputs are machine_predicted_unvalidated and are not human labels or direct frontier model labels.
Codex and Gemma teacher scores by category
| Category | Codex | Gemma |
|---|---|---|
| Metaresearch | 0.001 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.002 |
| Science and technology studies | 0.001 | 0.001 |
| Scholarly communication | 0.000 | 0.000 |
| Open science | 0.002 | 0.000 |
| Research integrity | 0.000 | 0.000 |
| Insufficient payload (model declined to judge) | 0.000 | 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 teacher head, 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".