Geoscience Reference
In-Depth Information
tAble 15.2 (continued)
the fraction of organic Carbon (f
oc
) and herbicide-Soil
binding (k
d
) of eptC, Metribuzin, and Metolachlor in
validation Soil Samples from three fields in Colorado
Wiggins l
K
d
zone
eC
a
0-0.3 m
eptC
Metribuzin
Metolachlor
f
oc
7.63
0.44
0.16
0.68
0.0044
9.65
0.47
0.18
0.71
0.0047
Low
f
oc
10.45
0.57
0.20
0.88
0.0049
10.60
0.55
0.17
0.90
0.0049
Avg
9.58
0.51
0.18
0.79
0.0047
Std. dev.
1.37
0.06
0.02
0.11
0.0002
17.50
0.65
0.24
1.08
0.0062
16.77
0.72
0.24
1.14
0.0060
11.76
0.88
0.26
1.24
0.0051
High
f
oc
11.90
0.78
0.22
1.45
0.0051
21.10
1.32
0.28
1.46
0.0068
21.67
1.33
0.39
1.85
0.0069
Avg
16.61
0.95
0.27
1.37
0.0060
Std. dev.
5.52
0.30
0.06
0.28
0.0008
Wiggins 2
K
d
zone
eC
a
0-.3 m
eptC
Metribuzin
Metolachlor
f
oc
16.68
0.56
0.21
0.83
0.0040
Low
f
oc
16.40
0.58
0.18
0.85
0.0052
13.33
0.60
0.18
0.95
0.0044
15.16
0.62
0.17
0.95
0.0058
Avg
15.39
0.59
0.18
0.90
0.0048
Std. dev.
1.52
0.02
0.02
0.06
0.0008
21.79
0.70
0.25
1.03
0.0070
33.70
0.69
0.28
1.19
0.0058
19.24
0.67
0.38
1.21
0.0042
High
f oc
18.76
0.52
0.23
1.35
0.0041
27.84
0.71
1.35
0.0064
0 → 3
25.22
0.79
0.34
1.36
0.0062
Avg
22.77
0.68
0.30
1.25
0.0052
Std. dev.
4.48
0.09
0.06
0.13
0.0013
RefeRenCeS
Anonymous, Agricultural Chemical Usage 2002 Field Crops Summary USDA NASS, 2003, 104 p.
Blackshaw, R., Moyer, J.R., and Kozub, G.C., Efficacy of downy brome herbicides as influenced by soil prop-
erties,
Can. J. Plant Sci
., 74, 177, 1994.
Farahani, H.J. and Buchleiter, G.W., Temporal stability of bulk soil electrical conductivity in irrigated sandy
soil,
Trans. Am. Soc. Agric. Eng
. 47, 79, 2004.
