Effect of tree shelters on the survival and growth of deciduous tree species 6 years after afforestation
Bibliographic record
Abstract
The effect of tree shelters on the survival and growth in height and diameter of three tree species: common beech ( Fagus sylvatica L.), sycamore ( Acer pseudoplatanus L.) and sessile oak ( Quercus petraea Matt. (Liebl.)), was studied. The study was conducted in two experimental plantations established in the spring of 2018 at the Training and Experimental Forest Range Petrohan ((North-Western Bulgaria). Four experimental variants with tree shelters – Tubex Ventex Classic, Tubex Ventex Clear, Layflat Shelterguard, Layflat Treeguard and a control one (without tree shelters) were used. Twenty to twenty-seven seedlings in three replications of each variant and tree species were planted. The experimental plantation 1 was established on an east-facing flat terrain at an altitude of 600 m. The soil is Grey Luvisol mixture of sandy and clay, slightly stony, and very deep. The site class is medium rich to rich. The experimental plantation 2 is located in a high-density game area. The area is a meadow, facing north, with an 8o slope and altitude of 850 m. The soil is Dystric-Eutric Cambisol, a mixture of sandy and clay, slightly stony and deep. The site class is medium rich to rich. In the autumn of the 6-th year after the establishment of the plantations, survival was assessed and the height and root collar diameter of all seedlings from each variant and replication were measured. Survival is relatively high in the tree shelter variants, while it is significantly lower in the control variant. Height growth is better in the tree shelter variants, especially in the variants with ventilated tree shelters A and B, in which the highest percentage of seedlings with a height greater than that of the tree shelters was also found. The tree shelter variants have a larger root collar diameter, but in some cases the difference with the control (without tree shelters) is not statistically significant. For future afforestation, the ventilated tree shelters Tubex Ventex Classic and Tubex Ventex Clear could be recommended.
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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".