Soil Characteristics and Lodgepole Pine (Pinus contorta var. latifolia) Performance Two Decades after Disk Trenching of Unburned and Broadcast-Burned Plots in Subboreal British Columbia
Table 4
Treatment1 effects2 on lodgepole pine foliar nutrient ratios after 10 and 20 years.
Burning effects
Position effects
Burning × position effects
Year
Unburned
Burned
value3
Control
Hinge
Trench
value
UB-C
UB-H
UB-T
B-C
B-H
B-T
value
N : K
10
2.00 ± 0.04
2.02 ± 0.04
0.740
1.94 ± 0.05
2.01 ± 0.05
2.08 ± 0.05
0.098
1.91 ± 0.06
2.00 ± 0.07
2.09 ± 0.07
1.98 ± 0.07
2.01 ± 0.07
2.08 ± 0.06
0.791
20
2.10 ± 0.13
1.87 ± 0.13
1.99 ± 0.13
N : Mg
10
14.4 ± 0.5
15.8 ± 0.5
0.078
14.4 ± 0.5 b
14.8 ± 0.5 ab
16.1 ± 0.5 a
0.021
13.3 ± 0.6
14.7 ± 0.7
15.1 ± 0.7
15.5 ± 0.7
14.9 ± 0.7
17.1 ± 0.6
0.208
20
10.9 ± 0.4
10.0 ± 0.4
9.6 ± 0.4
N : S
10
11.3 ± 0.3
10.9 ± 0.3
0.379
10.9 ± 0.3
11.6 ± 0.3
10.7 ± 0.3
0.102
11.1 ± 0.4
11.7 ± 0.4
11.0 ± 0.4
10.7 ± 0.4
11.5 ± 0.4
10.5 ± 0.4
0.929
20
13.8 ± 0.3
13.5 ± 0.3
13.8 ± 0.3
P : Al
10
2.15 ± 0.06
2.08 ± 0.06
0.469
2.12 ± 0.06
2.17 ± 0.06
2.06 ± 0.06
0.265
2.13 ± 0.08
2.24 ± 0.08
2.08 ± 0.08
2.11 ± 0.08
2.09 ± 0.08
2.05 ± 0.08
0.498
20
2.73 ± 0.16
2.71 ± 0.16
2.93 ± 0.16
K : Ca
10
2.95 ± 0.20
3.16 ± 0.20
0.474
3.02 ± 0.16
3.16 ± 0.16
2.99 ± 0.16
0.316
3.00 ± 0.22
3.08 ± 0.22
2.76 ± 0.22
3.03 ± 0.22
3.24 ± 0.22
3.22 ± 0.22
0.194
20
3.61 ± 0.25
3.37 ± 0.25
3.49 ± 0.25
Ca : Mg
10
2.46 ± 0.09
2.50 ± 0.09
0.737
2.46 ± 0.08 ab
2.36 ± 0.08 b
2.63 ± 0.08 a
0.036
2.33 ± 0.11
2.41 ± 0.12
2.64 ± 0.12
2.60 ± 0.12
2.31 ± 0.12
2.61 ± 0.11
0.137
20
1.54 ± 0.09
1.69 ± 0.09
1.44 ± 0.09
N : P
10
6.97 ± 0.09
7.11 ± 0.09
0.306
6.87 ± 0.11
7.10 ± 0.11
7.15 ± 0.11
0.183
6.74 ± 0.14
7.10 ± 0.16
7.07 ± 0.16
7.00 ± 0.16
7.10 ± 0.16
7.23 ± 0.14
0.699
20
7.81 ± 0.27
7.54 ± 0.27
7.51 ± 0.27
1 Refer to Table 1 for treatment abbreviations. 2Values are mean ± one standard error. Letters are supplied only for variables where the Bonferroni test found significant differences between individual means within a given year. Means having the same letter do not differ significantly () within the given year according to the Bonferroni test. 3 values in bold indicate .
