Physiological and morphological traits of lowbush blueberry (<i>Vaccinium angustifolium</i> Ait.) plants in relation to post-transplant conditions and water availability
Bibliographic record
Abstract
Experiments were conducted with the lowbush blueberry (Vaccinium angustifolium Ait.) to investigate 1) changes in leaf water potential (ψ 1 ) of transplanted seedlings, and rhizome development under various surface mulches, and 2) the water relations of mature plants subjected to irrigation or water withholding. Pre-dawn ψ 1 for seedlings in bare-ground, sand and bark mulch treatments was > −0.2 MPa for most of the season following transplant. Dusk ψ 1 was lower than predawn ψ 1 for the first 2 wk after transplant under mulch and for the first 3 wk in bare ground, but these differences were not sustained. Rhizome numbers were 40% and 120% greater under bark and sand mulch, respectively, when compared with bare ground after three growing seasons. Mature (15-yr old) plants of cultivars Fundy and Brunswick were grown for one season under either rain-sheltered, rainfed or irrigated conditions. Pre-dawn ψ l showed little or no difference between treatments until early August when, with volumetric soil water content below 8%, ψ 1 of sheltered plants was reduced to about −0.3 MPa as compared with −0.1 MPa in rainfed and irrigated plants. Similarly, midday ψ l and stomatal conductance (g l ) were lower in sheltered, than in irrigated plants during August. Irrigated plants produced more large (>12-mm diameter), and fewer small (<10 mm) fruit than those under shelter where size distribution was about equal (Fundy), or showed a predominance of medium and smaller fruit (Brunswick). Fundy and Brunswick differed in the degree to which reduced soil water affected ψ 1 , g 1 and fruit size distribution. Both Fundy and Brunswick possessed deep penetrating root networks with 35 and 60% of roots, respectively, terminating below 40 cm. This suggests that mature plants can resist drought by accessing water resources well below the soil surface. Key words: Mulch, water potential, stomatal conductance, wild blueberry, root architecture
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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 | 0.000 |
| 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) | 0.001 | 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 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".