Geoscience Reference
In-Depth Information
tAble 4.4
Means and Ranges of Soil factors (eC
e
, Sp, and
θ
w
) and the Correlations
of ln(eMI
ave
) with ln(eC
e
), Sp, and
θ
w
for Six field-Scale Surveys
Soil factors (eC
e
, Sp, and
θ
w
)
field
Mean
Range
Correlation
a
Coachella valley Wheat field
ln(EMI
ave
) and ln(EC
e
)
2.33
0.85-6.64
0.87
ln(EMI
ave
) and SP
40.4
36.5-45.8
0.78
ln(EMI
ave
) and θ
w
0.24
0.18-0.32
0.77
Coachella valley Sorghum field
ln(EMI
ave
) and ln(EC
e
)
10.1
5.37-16.8
0.88
ln(EMI
ave
) and SP
57.0
51.0-61.1
−0.20
ln(EMI
ave
) and θ
w
0.38
0.33-0.41
0.25
broadview Water district (Quarter Sections 16-2 and 16-3)
ln(EMI
ave
) and ln(EC
e
)
3.65
1.61-8.19
0.62
ln(EMI
ave
) and SP
50.3
33.2-85.0
0.84
0.31
0.21-0.39
0.86
ln(EMI
ave
) and θ
w
fresno Cotton field
ln(EMI
ave
) and ln(EC
e
)
5.42
1.28-9.57
0.87
ln(EMI
ave
) and SP
79.4
59.3-103.0
0.71
0.28
0.22-0.33
−0.65
ln(EMI
ave
) and θ
w
Coachella valley—kohl Ranch field
ln(EMI
ave
) and ln(EC
e
)
11.8
3.73-22.9
0.94
ln(EMI
ave
) and SP
63.3
59.7-66.7
−0.33
ln(EMI
ave
) and θ
w
0.33
0.30-0.36
0.76
ln(EMI
ave
) and ln(SAR)
23.2
5.55-40.2
0.89
ln(EMI
ave
) and ln(B)
1.44
0.52-2.57
0.91
broadview Water district (Quarter Section 10-2)
ln(EMI
ave
) and ln(EC
e
)
2.66
0.90-5.69
0.80
ln(EMI
ave
) and SP
55.4
40.6-67.4
0.49
ln(EMI
ave
) and θ
w
0.38
0.29-0.42
0.59
ln(EMI
ave
) and ρ
b
1.35
1.26-1.44
−0.35
ln(EMI
ave
) and sand
25.5
8.35-49.9
−0.38
ln(EMI
ave
) and silt
39.3
26.3-51.6
0.42
ln(EMI
ave
) and clay
35.3
23.8-44.5
0.29
Note:
EM
ave
is the geometric mean (i.e., sqrt[EMI
h
· EMI
v
]) of the EC
a
taken in the horizontal
(EMI
h
) and vertical (EMI
v
) coil configurations using EMI, EC
e
is the electrical conductivity
of the saturation paste (dS m
−1
), SP is the saturation percentage, θ
w
is the volumetric water
content (cm
3
cm
−3
), SAR is the sodium adsorption ratio, B is boron (mg kg
−1
), ρ
b
is the bulk
density (g cm
−3
), sand is the percent sand, silt is the percent silt, and clay is the percent
clay.
a
The correlation column corresponds to the correlation between the measured EC
a
and the speci-
fied soil property.
Source:
Modified from Corwin, D.L., and Lesch, S.M.,
Agron. J.
, 95, 455-471, 2003. With
permission.
