Claim · model-written summary
DRIS-guided fertilizer increased height growth increment 15% at Squamish 23.
- Taxon
- black cottonwood
Populus trichocarpat0 - Treatment
- application of fertilizere1
- Outcome
- height growth incremente0
- Direction
- increasede0
- Value
- 15%e0
- Setting
- Squamish 23 sitee0
Not reportedMaterialGeneCompoundOrgan / stageInteractorInteractor roleSecond interactorSecond interactor roleComparatorQualifier
Organisms pictured · Representative pictures of the matched species, not figures from the paper.
Verbatim
e0“basal area increment increased by 65%, and height growth increment by 15% at the Squamish 23 site”
e1“application of fertilizer”
t0“black cottonwood”
Title
Growth and nutrient relations in black cottonwood in South-Coastal British Columbia
McLennan, Donald S. cIRcle (University of British Columbia) 2008. doi:10.14288/1.0075152
Other claims from this paper (19)
- Observation Foliar nutrient concentrations vary within canopies and among trees.
- Observation Foliar nutrient concentrations varied seasonally and year to year, altering interpretation.
- Observation Soil nutrient concentrations varied substantially among soil strata.
- Observation Spatial variation in soil nutrient contents exceeded that of concentrations.
- Method / resource Compositing approximately doubled sampling variability.
- Association Site-unit classification explained 87% of cottonwood site-index variance.
- Observation Cottonwood growth was best on high alluvial benches and moist uplands with seepage.
- Observation Cottonwood growth was poorest on low alluvial benches and gleyed marine units.
- Method / resource Understory vegetation predicted about half the site-index variation.
- Association Sites with high soil pH, high Ca and Mg, and low N, P, K had the lowest site index.
- Association Cottonwood site index declined with increasing flood frequency and duration.
- Association Upland gleying and prolonged flooding correlated with low site index.
- Observation High site-index stands were diagnosed as K limited, then P limited.
- Intervention effect DRIS-guided fertilizer increased basal area increment 65% at Squamish 23.
- Intervention effect Fertilizer increased basal area increment 65% at Strawberry.
- Intervention effect Fertilizer increased height growth increment 30% at Strawberry.
- Intervention effect Fertilizer increased basal area increment 27% at Soowahlie.
- Intervention effect Fertilizer had no significant height growth response at Soowahlie.
- Association Foliar response did not correlate significantly with wood production.