Transient Seed Bank of Camelina Contributes to a Low Weedy Propensity in Western Canadian Cropping Systems
Bibliographic record
Abstract
ABSTRACT Camelina [ Camelina sativa (L.) Crantz.] is an oilseed currently being developed for production of industrial bioproducts. To determine whether camelina is persistent or weedy in agricultural areas experiments were conducted in 2008 through 2011. A three‐part study quantified camelina seed loss at the time of harvest, persistence of seed in the soil, and density and persistence of volunteer populations in subsequent crops. In this small‐seeded crop, seed losses at harvest ranged from 1202 to 43,430 viable seeds m −2 (12.0 to 434.3 kg ha −1 ). Viable seed persisted less than 15 mo at all depths, sites, and years. Seeds persisted longer on the soil surface while seed buried at 3 and 10 cm depleted more rapidly. The days to 50% seed extinction (EX 50 ) ranged from 25 d for all burial depths at one site in 2009 to 66 d for surface seeds in 2008. Eleven commercial fields planted to camelina in 2009 were surveyed for the presence and persistence of volunteer populations throughout the 2010 and 2011 growing seasons. Initial surveys showed variable densities (9 to 4839 plants m −2 ); however, populations sharply declined over time and were nearly extinct after 2 yr under conventional production practices. While camelina has high fecundity and large seed losses at harvest, it has limited seed bank persistence and is unlikely to become a weed of agricultural areas.
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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 | 0.000 | 0.000 |
| Meta-epidemiology (narrow) | 0.000 | 0.000 |
| Meta-epidemiology (broad) | 0.000 | 0.000 |
| Bibliometrics | 0.000 | 0.000 |
| Science and technology studies | 0.000 | 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) | 0.000 | 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".