Table 2 Isotropic semi-variance function model and its parameters of SOC content in different soil layers.

From: Distribution characteristics of top SOC in different forest types of Genhe in the Greater Khingan Range of Inner Mongolia

Soil depth (cm)

Model theory

C0

C0 + C

[C0/(C0 + C)] (%)

Range (m)

R2

RSS

0–5

Gaussian

0.004

2.01

99.80

39.28

97.30

0.11

5–10

Gaussian

0.001

1.53

99.90

18.29

82.00

0.98

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