Table 2. Values of root cohesion based on the tree species used in this study.

Species	Age class	Root cohesion (kPa)	Reference
Pinus densiflora	II	10.4	Oh et al.(2011)
Pinus koraiensis	V	15.7	Kim et al.(2011)
Larix kaempferi	II	10.2	Oh et al.(2011)
Cryptomeria japonica	II	13.2	Genet et al.(2008)
Quercus mongolica	II	13.2	Oh et al.(2011)
Alnus japonica	II	12.7	Oh et al.(2011)
Liriodendron tulipifera	IV	5.0	Hales et al.(2009)
Populus deltoides	I	0.5	Pourmalekshah et al.(2019)
Robinia pseudoacacia	I	15.0	Wang et al.(2020)