Geoscience Reference
In-Depth Information
Table 17.1
Chemical and physical properties of soils with a gypsic horizon, SSL database
Horizon Depth (cm)
Silt (%) Db (g/cm
3
)
Clay (%)
pH SOC (%)
CEC (cmol
c
/kg)
SAR
EC (dS/m)
Carbonate (%) Gypsum (%)
Pedon no. 40A0171, Reeves, Ustic Calcigypsids, Reeves, TX
A1
0-1
25.6
43.4
7.3
1.27
18.8
2.5
12
A2
1-5
29.9
41.8
7.6
0.96
20.4
3.8
12
A3
5-13
29.2
42.2
1.45
7.5
0.93
20.0
4
12
Bk1
13-33
34.7
39.8
7.4
0.63
19.2
9.2
19
Bk2
33-53
38.3
40.1
1.33
7.3
0.63
18.3
29.1
26
Bk3
53-56
41.1
34.3
tr
By1
56-84
49.8
30.2
1.36
7.2
0.26
5.7
21.3
10
62
By2
84-115
39.3
50.4
7.5
0.14
4.8
17.4
8
62
By3
115-140
44.2
40.5
7.6
0.16
8.4
16.6
14
45
By4
140-180
42.8
42.8
7.7
0.18
8.1
21.3
11
50
Pedon no. 82P0510, Hollomex, Ustic Haplogypsids, De Baca, NM
A
0-5
10.0
41.2
1.36
7.6
1.22
13.8
2.4
9
By1
5-15
1.14
7.4
0.65
1.8
2.2
4
66
By2
15-32
7.4
0.49
2.5
2.4
3
62
By3
32-44
1.15
7.6
0.33
1.6
4.8
3
63
By4
44-51
7.9
0.26
3.9
5.9
5
51
C1
51-70
8.0
0.23
3.4
6.3
6
58
C2
70-100
8.3
0.25
3.2
6.8
6
57
C3
100-140
1.37
8.5
0.21
1.1
7.1
6
64
Pedon no. 79P0140, Orla, Typic Haplogypsids, Reeves, TX
A
0-3
15.0
31.1
7.1
1.09
14.2
tr
2.9
10
1
By1
3-15
36.3
29.0
7.3
0.37
3.0
tr
2.6
3
68
By2
15-48
30.7
46.0
7.6
0.24
2.8
tr
2.5
1
66
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