Claim · model-written summary
Logarithmic equations gave systematic underestimates of tree and component weights.
- Taxon
- Lodgepole pine
Pinus contortae0 - Outcome
- systematic errors (underestimates)e1
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleTreatmentComparatorSettingDirectionValueQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“Lodgepole pine (Pinus contorta Dougl. var. latifolia Engelm.) is a species of considerable importance to the forest economies of Alberta”
e1“The systematic errors (underestimates) resulting from the use of logarithmic equations were examined”
Title
Dry-matter production and complete-tree utilization of lodgepole pine in Alberta
Johnstone, Wayne David cIRcle (University of British Columbia) 2011. doi:10.14288/1.0101020
Other claims from this paper (17)
- Association Of the variables tested, D²H (tree diameter squared times total height) was most closely associated with component dry-weights.
- Association D²H gave reliable estimates of tree and component weights.
- Association Total tree and component biomass per acre was positively correlated with basal area per acre.
- Association Total tree and component biomass per acre was inversely related to number of stems per acre on a given site.
- Association BA•H (stand basal area times mean stand height) was closely associated with most component dry-weights per acre.
- Association The above-ground total stand crop of young lodgepole pine stands was substantially higher than that of similarly aged Populus stands on similar sites.
- Association Volume growth was highly correlated with the amount of foliage.
- Association Volume growth efficiency (growth per unit of foliage) was not related to tree size.
- Observation A large amount of within-tree variation in growth was not accounted for by the growth-foliage relationships.
- Intervention effect Thinning did not appear to affect the pattern of growth of the trees examined.
- Association Tree size was significantly positively related to the unscreened yield of pulp from the full bole only.
- Association Tree size or growth rate was not significantly related to pulp quality for any component.
- Observation The yield and quality of pulp from the non-merchantable top were relatively high.
- Observation The yield and quality of pulp from the root-stump system were high.
- Observation The yield and quality of pulp from branchwood were low.
- Recommendation Immediate consideration should be given to utilizing the non-merchantable top because its pulp is relatively high in yield and quality.
- Recommendation Utilization of small-diameter trees for pulp depends on economic harvesting and processing rather than pulp yield and quality.