Table 1.

Tree diameter, height, and width at 6 and 10 years after planting.z

nTree dbh (cm)Tree height (m)Canopy width (m)
Mean ± SEMedianMean ± SEMedianMean ± SEMedian
2007, Year 10
    Quercus bicolor
      Pavement14  15.1 ±0.6  15.0NS  5.9 ± 0.2  6.1NS  5.1 ±0.3  5.3NS
      Tree lawn  7  14.9 ± 1.0  14.2NS  6.5 ± 0.4  6.4NS  4.3 ±0.4  4.3NS
    Quercus phellos
      Pavement11  20.1 ± 1.2  21.4NS  7.2 ± 0.4  7.7NS  6.0 ±0.4  6.0NS
      Tree lawn  8  22.5 ± 1.0  22.8NS  8.4 ± 0.3  8.1NS  5.9 ±0.3  6.0NS
    Koelreuteria paniculata
      Pavement  7  17.2 ± 0.6  17.1NS  5.9 ± 0.3  5.4NS  6.7 ±0.3  6.5NS
      Tree lawn  2  16.8 ± 1.2  16.8NS  6.5 ± 0.1  6.5NS  6.5 ±0.5  6.5NS
2003, Year 6
    Quercus bicolor
      Pavement14  8.4 ± 0.3  8.8NS  5.2 ± 0.2  5.3NS
      Tree lawn  8  8.1 ± 0.8  8.1NS  4.8 ± 0.2  4.9NS
    Quercus phellos
      Pavement11  10.7 ±0.1  11.4NS  5.6 ± 0.2  5.6NS
      Tree lawn  8  9.7 ± 0.5  9.9NS  5.3 ±0.1  5.3NS
    Koelreuteria paniculata
      Pavement  7  10.9 ±0.4  10.7NS  4.7 ± 0.1  4.7NS
      Tree lawn  2  10.2 ±0.5  10.2 NS  4.3 ± 0.2  4.3NS
  • zMeans and standard errors are listed to indicate species–treatment variability. Two sample Mann-Whitney tests on medians in nonparametric analysis at α = 0.05 showed no significant differences (NS) between treatments. Canopy width was not collected in 2003.

  • dbh = diameter at breast height; SE = standard error.