Table 5. Biomass expansion factor(BEF) one sample t-test results.

Species	BEF	μ	P-value
M. glyptostroboides	1.738(0.031)	1.29(Fixed coefficient by forest type)	<0.001
P. occidentalis	1.561(0.035)	1.22(Fixed coefficient by forest type)	<0.001

μ is the coefficient used during the calculation of urban forest carbon stocks(Son et al., 2008; Park and Jwa, 2009).