Evaluating Slow Pyrolysis of Parthenium hysterophorus Biochar: Perspectives to Acidic Soil Amelioration and Growth of Selected Wheat (Triticum aestivum) Varieties
Table 4
Summary of two-way ANOVA results for the soil chemical properties in terms of soil sample years and parthenium biochar dosages.
Source of variations
DF
pH (H2O)
pH (KCl)
EC (ms/cm)
Ca (cmol+/kg)
K (cmol+/kg)
Na (cmol+/kg)
Mg (cmol+/kg)
CEC(cmol+/kg)
AvP (ppm)
OC (%)
MS
P
MS
P
MS
P
MS
P
MS
P
MS
P
MS
P
MS
P
MS
P
MS
P
SSY
1
3.17
4.02
2.14
85.5
34.0
0.3
41.1
268.5
4285.7
5.2
PBD
5
4.9
4.04
1.6
25.9
35.7
0.2
8.9
p > 0.05
73.6
2561.7
1.84
5
0.14
0.05
0.15
6.5
2.7
0.009
2.5
11.9
227.8
0.34
Error
24
0.26
—
0.28
—
1.015
—
1.11
—
11.16
—
0.002
—
2.6
—
2.3
—
19.8
—
0.0016
—
Mean
7.1
—
6.44
—
0.01
—
15.4
—
4.5
—
0.59
—
6.2
—
26.24
—
48.3
—
1.5
—
R-square (R2)
0.82
—
0.78
—
0.97
—
0.90
—
0.89
—
0.81
—
0.60
—
0.92
—
0.97
—
0.97
—
SSY, soil sample years; PBD, parthenium biochar dosages; MS, mean square; P, probability level; and DF, degree of freedom.