Environmental Engineering Reference
In-Depth Information
Slash-and-burn and slash without burning
(proka)
For week 1 organic matter content (OM) appeared to be slightly higher under the
proka
(P) than the slash-and-burn plot, although by week 5, OM content on slash-
and-burn was appreciably higher than on the slash-no-burn plot at the different
soil depths (Table 14.4).
For week 1 the phosphorus content between 0 and 10 cm depth was higher
in the soil of the slash-and-burn than that of slash-no-burn, although between
10 and 30 cm soil depth, phosphorus content of the soil under the slash-
no-burn system was higher than under the slash-and-burn (Table 14.4).
By week 5 the phosphorus content in the soil under the slash-no-burn system
was higher at all depths when compared to the soil of the slash-and-burn.
Table 14.4 Results of soil analyses in the slash-no-burn
proka
and slash-and-burn fields
Depth of
pH 1:1
OM
K
mg kg
1
sample (cm)
H
2
O
N
%
P
Ca
Week 1
P
0-5
7.3
0.18
4.30
29.33
0.82
13.8
5-10
7.2
0.12
3.29
10.82
0.64
8.0
10-15
7.2
0.10
2.81
10.85
0.61
6.6
15-20
7.1
0.09
2.67
9.65
0.59
6.2
20-30
6.9
0.09
2.65
8.03
0.59
6.0
Week 1
BF
0-5
7.3
0.20
4.10
31.25
1.41
10.0
5-10
7.4
0.13
3.22
13.78
0.95
9.8
10-15
7.1
0.13
2.81
8.30
0.72
8.2
15-20
7.2
0.10
2.55
5.63
0.69
7.6
20-30
7.4
0.08
2.10
5.18
0.54
6.4
Week 5
P
0-5
7.4
0.14
2.61
34.96
1.48
8.6
5-10
6.9
0.11
1.68
9.22
0.96
5.8
10-15
6.7
0.10
1.38
6.64
0.71
5.2
15-20
6.6
0.08
1.22
4.98
0.58
4.0
20-30
6.7
0.07
1.13
3.17
0.39
3.8
Week 5
BF
0-5
7.2
0.14
3.44
13.69
0.93
10.4
5-10
7.0
0.12
2.97
6.98
0.69
8.6
10-15
7.1
0.11
2.31
4.42
0.51
7.0
15-20
7.3
0.10
1.97
3.01
0.32
7.2
20-30
7.3
0.08
1.48
1.95
0.27
6.6
Week 5
P (bulked)
6.9
0.12
1.66
12.61
0.95
5.8
BF (bulked)
6.9
0.11
2.06
6.36
0.72
7.0
OM - Organic matter; P -
Proka
field; BF - Burnt field.
