Short-Term Effects of Land Leveling on Irrigation-Related Some Soil Properties in a Clay Loam Soil
Table 4
Summary of geostatistical parameters for subsurface soil (20–40 cm) properties measured before and after land leveling.
Soil parameter
Preleveling
Postleveling
Model
Nugget ()†
Sill ( + )†
Range (m)
/( + )
Model
Nugget ()
Sill ( + )
Range (m)
/( + )
BD (g cm−3)
Gaussian
0.0054
0.019
69.9
0.718
0.97
Linear
0.006
0.0063
74.6
0.051
0.01
Sand (%)
Spherical
23.50
65.82
68.8
0.643
0.91
Linear
92.59
152.9
74.6
0.394
0.67
Silt (%)
Linear
16.87
25.81
74.6
0.347
0.83
Linear
27.4
48.02
74.6
0.435
0.88
Clay (%)
Spherical
5.02
21.71
55.0
0.769
0.84
Linear
33.31
46.27
74.6
0.280
0.43
pH
Spherical
0.003
0.009
75.6
0.670
0.96
Linear
0.0232
0.0232
74.6
0.000
0.45
EC (dS m−1)
Gaussian
0.0018
0.0066
151.6
0.723
0.99
Linear
0.0038
0.0038
74.6
0.000
0.93
FC (%wt)
Gaussian
2.44
9.339
90.6
0.739
0.99
Linear
11.52
20.16
74.6
0.429
0.80
PWP (%wt)
Gaussian
1.50
11.21
92.5
0.866
0.99
Spherical
4.79
12.60
73.1
0.620
0.81
WHC (mm)
Gaussian
11.66
26.82
93.4
0.565
0.95
Linear
25.30
36.28
74.6
0.302
0.57
†: represents the inherent nonspatially related variability in the data, and represents the variability explained by any spatial component in the data.
