Article Figures & Data
Figures
- Figure 1.
Terminal growth rates of sugar maples at the 2 study sites in East Lansing, Ml, during the 1993 growing season.
- Figure 2.
Precipitation and soil moisture content at the study sites.
Tables
- Table 1.
Atmospheric/climatic factors on 6 measurement dates from July through September 1993 at the campus and forest sites. Values are means of 7 trees per site.
Date 7/9 7/20 7/31 8/14 9/4 9/24 Air temp (°C)** Campus streets 30.6 29.2 30.6 32.6 25.3 19.8 Forest site 28.2 26.1 28.5 30.2 23.1 17.4 Leaf temp (°C)** Campus streets 29.7 28.3 29.7 31.6 24.6 19.8 Forest site 27.2 25.5 27.6 30.0 22.3 16.9 Relative humidity (%)** Campus streets 30.0 36.8 35.6 45.4 46.5 35.4 Forest site 41.6 46.0 48.9 48.8 56.9 53.6 Vapor pressure deficit (KPa)** Campus streets 2.9 2.4 2.7 2.5 1.7 1.5 Forest site 2.2 1.7 1.9 2.2 1.2 0.9 ↵** Significant differences on all dates between campus and forest trees at 0.01 level.
- Table 2.
Mean soil exchangeable cation concentrations (standard deviation) in ppm between the street (campus) and forest sites, 1993.
Cation May 30 August 3 Street Forest Street Forest Mg 177(3) 167(8) 159 (3) 155(10) Na 71 (29)** 15(1) 96 (47)** 14(1) Ca 1699 (31)** 1183(42) 1602 (29)** 1123(38) K 100(15)** 45(14) 85 (18)** 42 (15) ↵** Significant difference between campus and forest trees at 0.01 level.
- Table 3.
Mean soil pH and foliar elemental concentrations (standard deviation) of sugar maple street trees (campus) and forest trees (Minnis).
Street Forest Soil pH** 7.29 (0.11) 5.62 (0.51) Element (%) N** 1.58 (0.19) 2.04 (0.25) P 0.19 (0.04) 0.15 (0.01) K* 0.58 (0.01) 0.69 (0.05) Mg 0.26 (0.03) 0.22 (0.04) Ca** 2.01 (0.03) 1.44 (0.04) Element (ppm) Mn** 66 (51) 571 (418) B* 55 (8) 66 (7) Fe 120 (29) 140 (28) Al 108 (28) 106 (24) Na* 27(11) 17(6) Zn 19(5) 22(4)
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