Table 14.2
Chemical composition of the sand from Casuarina
stands of different ages in two soil horizons (AC and Cg)
Site
pH
C
N
CaCO
3
Ca
2+
Mg
2+
K
+
Na
+
EC
Cl
-
HCO
3
SO
4
Ca2
+
Mg
2+
K
+
Na
+
(%)
(cmol
c kg
-1
)
(mS/cm)
(meq/L)
Exchangeable cations
Soluble anions and cations
Young Casuarina
AC (0–8 cm)
8.3
1.8
0.10
10.5
11.3
2.5
0.2
2.5
5.4
42.2
9.3
5.9
18.1
10.6
2.3
69.1
Cg (8–56 cm)
9.7
1.2
0.02
12.4
4.9
0.9
0.1
0.4
1.0
6.4
3.2
0.96
3.8
2.3
0.2
8.3
Mature Casuarina
A1 (0–5 cm)
7.6
2.8
0.18
9.0
20.4
3.1
0.2
1.0
4.2
25.7
13.8
2.7
36.8
14.5
0.9
17.4
Cg (5–60 cm)
8.6
0.12
0.02
12.9
5.1
0.8
0.1
0.4
2.4
19.3
2.7
1.5
16.6
6.8
0.4
12.8
Old Casuarina
A1 (0–5 cm)
9.6
7.1
0.37
10.3
12.4
2.6
0.3
5.4
3.7
20.3
25.7
4.3
9.5
20.6
0.9
51.7
Cg (9–35 cm)
9.1
0.18
0.03
12.8
5.3
1.4
0.1
0.5
1.2
8.8
4.6
1.1
4.8
3.2
0.2
10.0
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