Table 4. Pearson’s correlation of site index and site or soil profile properties of the soil horizons in Quercus mongolica stands.

Variables	Site index	Altitude	Aspect	Slope	Soil depth	Hue	Chroma	Value
Site index	1.00				A horizon
Altitude	0.24	1.00
Aspect	−0.09	0.02	1.00
Solpe	0.20	0.00	0.03	1.00
Soil depth	0.12	0.37	0.01	0.08	1.00
Hue	−0.27	−0.16	−0.16	−0.27	−0.12	1.00
Chroma	−0.10	−0.36	−0.01	−0.08	−0.35	0.42	1.00
Value	−0.14	−0.49	−0.17	−0.12	−0.41	0.20	0.53	1.00
Variables	Site index	Altitude	Aspect	Slope	Soil depth	Hue	Chroma	Value
Site index	1.00				B horizon
Altitude	0.34	1.00
Aspect	−0.05	0.00	1.00
Solpe	0.18	0.08	−0.03	1.00
Soil depth	0.01	−0.12	−0.13	0.11	1.00
Hue	−0.28	−0.16	−0.02	−0.25	0.12	1.00
Chroma	−0.21	−0.30	0.00	0.02	0.18	0.34	1.00
Value	0.03	−0.08	0.03	0.03	−0.07	0.10	0.59	1.00