Table 6 Results of PCA of various SQ indicators.

From: Comparative analysis of soil quality and enzymatic activities under different tillage based nutrient management practices in soybean–wheat cropping sequence in Vertisols

 

PC1

PC2

PC3

PC4

PC5

Eigenvalues

6.97

1.35

1.23

1.16

0.82

% Variance

58.12

11.28

10.28

9.65

6.84

Cumulative variance

58.12

69.40

79.68

89.33

96.17

Eigen vectors or factor loading

     

Bacteria

0.891

0.258

0.189

 − 0.071

0.222

Fungi

0.896

0.296

0.213

 − 0.169

0.094

Actinomycetes

0.916

0.117

0.256

 − 0.16

0.098

pH

0.827

0.191

0.277

 − 0.100

0.375

EC

 − 0.284

 − 0.864

 − 0.197

0.310

 − 0.068

Acid phosphatase

0.935

0.203

0.214

 − 0.065

0.149

Urease

0.877

0.063

0.234

 − 0.101

0.293

Dehydrogenase activity

0.938

0.248

0.183

 − 0.114

0.002

SOC

 − 0.121

 − 0.224

 − 0.103

0.958

 − 0.051

Available-N

0.718

0.123

0.25

 − 0.116

0.608

Available-P

0.433

0.241

0.842

 − 0.153

0.145

Available-K

0.731

0.414

0.235

 − 0.100

0.327

  1. *Bold values under each principal component are highly weighted and underlined bold values are selected in the minimum data set for SQI determination.
Back to article page