TABLE 1 
The Chemical Composition of the Exchange Complex, Organic Matter Content, 
AND Measurements of Plasticity of Typical Gray Hydromorphic Soils 
Gray Hydromorphic Soils — Gill and Sherman 1 39 
Plastic 
number 
11.8 
13.5 
12.5 
16.1 
16.5 
i 
15.5 
14.3 
15.7 
18.1 
18.6 
21.4 
29.8 
15.2 
26.8 
24.1 
16.2 
24.2 
24.8 
30.4 
Lower 
plastic 
limit 
34.7 
33.6 
32.2 
30.5 
25.9 
30.0 
31.4 
30.8 
30.5 
38.8 
39.2 
32.5 
28.5 
30.9 
30.2 
28.2 
30.7 
33.4 
41.8 
Upper 
plastic 
limit 
46.5 
47.1 
44.7 
46.6 
42.4 
45.5 
45.7 
46.5 
48.6 
57.4 
60.6 
62.3 
43.7 
47.7 
54.3 
44.4 
54.9 
58.2 
72.2 
Per cent soil 
particles 
less than 
.005 mm. 
49.2 
54.5 
66.5 
70.6 
71.0 
52.2 
54.4 
63.8 
62.2 
58.7 
66.8 
64.9 
Os fNJ fS ON (N ON 
C5 CN rO 00 
ITS NO SO ITS t" r-- 
Per cent 
organic 
matter 
2.14 
0.96 
1.66 
1.16 
2.11 
2.41 
2.24 
1.70 
1.36 
2.69 
2.80 
4.99 
1.51 
2.66 
2.76 
2.48 
2.04 
2.55 
3.37 
Ca:Mg 
ratio 
! 
2.43 
0.87 
1.40 
1.60 
1.14 
1.25 
1.18 
1.23 
1.10 
0.47 
0.54 
1.47 
0.76 
1.04 
1.19 
0.70 
1.28 
1.35 
1.64 
Per cent 
Mg 
saturation 
28.9 
35.5 
29.0 
36.2 
47.9 
46.4 
44.5 
, 51.0 
50.2 
52.5 
63.5 
30.2 
50.4 
48.0 
41.2 
66.5 
47.1 
46.3 
34.4 
Exchange- 
able 
magnesium 
m.e.llOO g. 
3.7 
3.9 
4.5 
4.5 
10.2 
12.9 
12.6 
12.4 
13.0 
16.7 
18.6 
12.4 
16.0 
14.1 
12.6 
16.9 
12.4 
12.0 
10.4 
Exchange- 
able 
calcium 
m.e.llOO g. 
9.0 
3.4 
6.3 
7.2 
11.6 
16.1 
14.8 
15.3 
14.3 
7.9 
10.1 
18.2 
12.1 
14.7 
15.0 
11.8 
15.9 
16.2 
17.1 
Cation 
exchange 
capacity 
m.e.llOO g. 
12.8 
11.0 
15.5 
12.7 
21.3 
27.8 
28.3 
24.3 
25.9 
31.8 
29.3 
41.1 
27.8 
29.4 
30.6 
25.4 
26.3 
25.9 
30.2 
X 
7.2 
6.7 
7.7 
7.2 
7.7 
m rn YD CN C30 
K so r2 
7.8 
7.4 
6.5 
7.8 
7.7 
7.4 
5.9 
Sample 
Honouliuii 
family 
Hon - 1 
Hon - 2 
Hon - 3 
Hon -4 
Hon - 5 
§ 1 1 1 1 1 1 1 
^ 
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