Article Figures & Data
Figures
- Figure 1.
Diurnal pattern of photosynthetic photon flux density (PPFD) at plaza, canyon and park sites.
- Figure 2.
Cumulative evaporation for park and plaza sites, and for a USDA Class I reference pan at the Center for Urban Horticulture. Evaporation at the canyon was similar to that of the park and Urban Horticulture sites.
Tables
Nursery Urban planting Geographic location rural urban Product tree ? Rotation length (yr.) 2-6 25-75 Physical environment radiant energy high variable evaporative demand moderate moderate-high atmospheric unknown moderate-high contaminants soil agricultural disturbed Intensity of culture pruning annual 3-10 yr. cycle fertilization high low irrigation high low pest management high low-moderate - Table 2.
Qualities Important In selecting trees for use In nursery production and urban areas.
Nursery responsive to intense culture marketability ease of propagation ease of transplanting Urban area responsive to minimal culture regular, well-configured, upright form strong compartmentalizer stress tolerant pest tolerant deep, but not invasive, root system ornamental unresponsive to artificial lights minimal litter solar-friendly easy to transplant readily available Urban space N Year planted Height (m) Diameter (cm) Park 10 1975 7.5+0.71 13.5±2.2 Plaza 12 1976 5.2 + 1.0 9.4+1.0 Canyon 11 1975 7.6±0.6 13.2±1.0 ↵1 Site average and standard error of mean. Data taken from Kjelgren (18).
Species Relative tolerance to: Flooded soils Poor soils Acer platanoides moderate ? Acer rubrum high high Acer saccharinum high ? Acer saccharum low low Fraxinus pennsylvanica moderate high Gleditsia triacanthos high moderate Liquidambar styraciflua high moderate Quercus palustris high high Quercus rubra moderate moderate Pyrus calleryana moderate moderate Tilia cordata moderate moderate Ulmus americana high high Sources: Fowells (10), Harris (14), Kielbaso etal. (17)
In this issue
Jump to section
- Article
- Abstract
- Urban Trees are Different
- What is an “Urban Tolerant’’ Tree?
- Do natural settings possess urban character?
- What Is “urban tolerant’’?
- Are a regions native species better adapted to its urban area than exotics?
- Characterizing Space in Urban Areas
- Site Analysis for Urban Plantings
- Guidelines for Selecting Urban Trees
- Guidelines for Long-term Management
- Summary
- Acknowledgment
- Footnotes
- Literature Cited
- Figures & Data
- Info & Metrics
- References
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