Spatial Variability and Geostatistical Analysis of Soil Properties in the Diversified Cropping Regions of Bangladesh Using Geographic Information System Techniques

Table 3

Semivariogram model parameters for soil nutrients at the depth of 20 cm.

Soil properties	Model type	Nugget (C0)	Partial sill (C)	Sill (C0 + C)	Nugget/sill ratio (%)	Spatial class	Range (degree)
pH	Spherical	0.0048	0.0607	0.0655	7.33	Strong	0.0383
EC (dS/m)	Spherical	0.0909	0.3056	0.3965	22.92	Strong	0.0493
SOC (%)	Spherical	0.0024	0.1614	0.1638	1.47	Strong	0.0688
Total N (%)	Spherical	0.0025	0.0014	0.0039	64.10	Moderate	0.1734
Av P (ppm)	Spherical	3,074.00	3,429.90	6503.9	47.26	Moderate	0.0402
Av K (ppm)	Spherical	0	1,001.06	1001.06	0	Strong	0.0414
Av S (ppm)	Spherical	546.93	407.29	954.22	57.32	Moderate	0.1593

^∗Nugget/sill ratio (%) = [C₀/(C₀ + C)] × 100. ^∗∗Strong = % nugget <25%; moderate = % nugget 25–75%; random = % nugget >75% [47].