Agriculture Reference
In-Depth Information
(a)
80
(b)
(c)
7.0
125
70
120
6.5
100
9 days
60
80
100
60
6.0
50
40
3 days
20
75
40
0
5.5
0246810
mm
30
50
5.0
3 days
6 days
9 days
20
25
4.5
10
0
4.0
0
0
2
4
6
8
10
0
2
4
6
8
10
0
2
4
6
8
10
Distance from surface exposed to O
2
(mm)
Figure 4.17
Profiles of (a) Fe(II), (b) Fe(III) and (c) pH in columns of reduced soil exposed to O
2
at one end for different times. Points
are experimentally measured; lines are predicted using the model described in the text with independently estimated parameter values (Kirk
and Solivas, 1994). Reproduced by permission of Blackwell Publishing
