Sixth- and Tenth-Year Growth Measurements for Three Tree Species in a Load-Bearing Stone–Soil Blend Under Pavement and a Tree Lawn in Brooklyn, New York, U.S.

Article Figures & Data

Table 1.

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

	n	Tree dbh (cm)		Tree height (m)		Canopy width (m)
	n	Mean ± SE	Median	Mean ± SE	Median	Mean ± SE	Median
2007, Year 10
Quercus bicolor
Pavement	14	15.1 ±0.6	15.0^NS	5.9 ± 0.2	6.1^NS	5.1 ±0.3	5.3^NS
Tree lawn	7	14.9 ± 1.0	14.2^NS	6.5 ± 0.4	6.4^NS	4.3 ±0.4	4.3^NS
Quercus phellos
Pavement	11	20.1 ± 1.2	21.4^NS	7.2 ± 0.4	7.7^NS	6.0 ±0.4	6.0^NS
Tree lawn	8	22.5 ± 1.0	22.8^NS	8.4 ± 0.3	8.1^NS	5.9 ±0.3	6.0^NS
Koelreuteria paniculata
Pavement	7	17.2 ± 0.6	17.1^NS	5.9 ± 0.3	5.4^NS	6.7 ±0.3	6.5^NS
Tree lawn	2	16.8 ± 1.2	16.8^NS	6.5 ± 0.1	6.5^NS	6.5 ±0.5	6.5^NS
2003, Year 6
Quercus bicolor
Pavement	14	8.4 ± 0.3	8.8^NS	5.2 ± 0.2	5.3^NS
Tree lawn	8	8.1 ± 0.8	8.1^NS	4.8 ± 0.2	4.9^NS
Quercus phellos
Pavement	11	10.7 ±0.1	11.4^NS	5.6 ± 0.2	5.6^NS
Tree lawn	8	9.7 ± 0.5	9.9^NS	5.3 ±0.1	5.3^NS
Koelreuteria paniculata
Pavement	7	10.9 ±0.4	10.7^NS	4.7 ± 0.1	4.7^NS
Tree lawn	2	10.2 ±0.5	10.2 ^NS	4.3 ± 0.2	4.3^NS

↵^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.