Agriculture Reference
In-Depth Information
No.
pH
Org C
(mg g
−
1
)
Labile C
(
µ
mol g
−
1
)
Free Fe
(
µ
mol g
−
1
)
1
7.7
10.4
79.5
12.1
2
6.0
16.8
582.7
13.8
3
5.1
18.5
713.9
3.6
4
7.4
13.4
376.5
8.2
5
6.3
11.5
424.3
13.6
6
6.7
13.5
477.3
10.2
7
7.6
9.5
265.4
7.3
8
5.9
19.7
818.7
4.9
9
5.1
16.5
575.2
22.4
10
6.2
21.4
331.1
22.3
11
6.8
26.2
319.0
24.9
12
6.0
15.1
200.4
13.0
13
6.7
10.7
118.0
24.5
14
5.8
13.9
272.3
33.1
15
6.1
8.1
405.9
4.3
16
6.0
15.5
422.0
10.8
500
(a)
CO
2
Fe
CH
4
Mn
NO
3
SO
4
400
300
200
100
0
12345678910111213141516
(b)
800
600
400
200
0
12345678910111213141516
Soil No.
Figure 5.3
Calculated electron balance between CO
2
produced and electron acceptors
reduced during anaerobic incubation of 16 rice soils (a) after the initial reduction phase
and (b) after 120 days (Yao
et al
., 1999). Reproduced with kind permission of Kluwer
Academic Publishers
