Evaluating Slow Pyrolysis of Parthenium hysterophorus Biochar: Perspectives to Acidic Soil Amelioration and Growth of Selected Wheat (Triticum aestivum) Varieties
Table 7
Eigenvector coefficients for the soil chemical properties contained in the first sixth principal components (PC1–6) derived from the principal component analysis of the indicated parameters in six treatments over two years.
Soil parameters
PC1
PC2
PC3
PC4
PC5
PC6
pH (H2O)
0.285
0.0163
−0.251
0.215
0.018
0.313
pH (KCl)
0.282
−0.0028
−0.252
0.238
0.039
0.329
EC
0.294
0.012
0.217
0.013
0.024
0.108
Av. P
0.289
−0.0176
0.222
0.131
−0.027
−0.114
OC
0.282
0.159
0.332
0.062
−0.135
0.050
CEC
0.291
0.252
0.109
0.081
0.043
−0.126
Ca++
0.283
0.328
0.037
0.046
0.126
−0.0014
K+
0.272
−0.005
0.428
0.039
0.054
0.154
Na+
0.224
0.109
0.0024
−0.880
0.266
−0.005
Mg++
0.224
0.449
−0.631
−0.0271
−0.090
−0.133
Cu
−00.236
0.443
0.171
−0.172
−0.545
0.512
Zn
−00.251
0.463
0.133
0.101
−0.165
−0.398
Mn
−0.271
0.059
−0.0471
−0.022
0.331
0.537
Fe
−0.239
0.418
0.151
0.223
0.667
0.007
Eigen value
10.407
0.811
0.677
0.537
0.417
0.314
% variance
0.743
0.058
0.048
0.038
0.03
0.022
Bold values indicate the most and the least explained variables.
