Where is Risk in Fumigation Choice: Methyl Bromide versus Alternatives?
Bibliographic record
Abstract
The phaseout of Methyl Bromide (MBr) required by the Montreal Protocol on Substances that Deplete the Ozone Layer has decreased its use in soil fumigation in the United States (U.S.). Reduced supplies also increased the price of MBr and affected producers net revenues and its cost effectiveness as a soil fumigant. The phaseout encouraged some producers to switch to available alternatives. Previous studies using partial budget analysis show that some alternatives are more cost effective with higher yields. Nevertheless, the share of crop acreage treated with MBr remains high, especially for tomatoes and strawberries. This study analyzes producers’ risk and risk aversion to construct a more comprehensive yield and economic analysis of the MBr use decision. The data are collected from fresh tomatoes production trials with MBr and alternatives conducted at the Plant Science Research and Education Unit, University of Florida in Citra, FL. The results show that alternative fumigants (especially carbonated Telone C35 with totally impermeable films) are often cost effective and provide higher yields. However, a risk analysis indicates that MBr has lower downside risk and is still preferred by risk averse producers.
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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 | 0.006 | 0.020 |
| Meta-epidemiology (narrow) | 0.001 | 0.000 |
| Meta-epidemiology (broad) | 0.001 | 0.001 |
| Bibliometrics | 0.001 | 0.001 |
| Science and technology studies | 0.001 | 0.003 |
| Scholarly communication | 0.005 | 0.007 |
| Open science | 0.001 | 0.001 |
| Research integrity | 0.002 | 0.003 |
| Insufficient payload (model declined to judge) | 0.007 | 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".