Spatial Heterogeneity of Soil Chemical Properties in a Subtropical Karst Forest, Southwest China

Table 2

Fitted model types and parameters for the semivariograms of soil chemical properties.

Soil properties	Model	Nugget (𝐶0)	Sill (𝐶0 + 𝐶)	Rang	𝐶0/𝐶0+𝐶	𝑅^2
pH	Exponential	0.0760	0.2380	310.9	0.319	0.743
OM (%)	Linear	15.3355	15.3355	89.53	1.000	0.227
TN (%)	Linear	0.0495	0.0495	89.53	1.000	0.057
TP (%)	Spherical	0.0011	0.0095	121.6	0.116	0.987
TK (%)	Spherical	0.0021	0.0108	78.4	0.194	0.979
TCa (%)	Linear	0.4022	0.4022	89.53	1.000	0.538
TMg (%)	Exponential	0.0008	0.0022	206.0	0.364	0.871
AN (mg/kg)	Spherical	3610	13860	45.6	0.260	0.949
AP (mg/kg)	Spherical	1.07	8.789	84.5	0.122	0.994
AK (mg/kg)	Spherical	950	5010	213.4	0.189	0.954