Table 1. Relationship between plants species and prediction formula.

Plant Slope factor R2
Cinnamomum camphora -0.33 0.89
Ligustrum japonicum -0.31 0.92
Hydrangea macrophylla -0.45 0.99
Prunus × yedoensis -0.15 0.95
Meratia praecox -0.25 0.71