Table 3 Principal component analysis and weights of the soil indicators.

From: Evaluation of soil quality and analysis of drivers of different vegetation patterns in the loess region of Northern Shaanxi

Indexes

PC1

PC2

PC3

PC4

Common factr variance (math.)

Weights

SWC

−0.790

0.446

0.254

0.139

0.907

0.073

BD

−0.911

0.037

−0.007

−0.152

0.854

0.069

MWHC

0.963

−0.133

0.029

0.097

0.954

0.077

CWHC

0.879

−0.220

0.179

0.199

0.893

0.072

TCP

0.921

−0.177

−0.014

0.067

0.885

0.071

SOC

0.641

0.559

0.003

0.264

0.793

0.064

EC

0.195

0.470

−0.534

−0.366

0.678

0.055

AN

0.850

0.015

−0.297

−0.128

0.827

0.067

AP

−0.074

0.767

0.109

0.201

0.645

0.052

AK

−0.067

0.470

0.370

−0.549

0.663

0.053

TN

0.164

0.759

0.012

0.343

0.721

0.058

TP

−0.347

−0.132

−0.409

0.543

0.600

0.048

N/P

0.248

0.724

−0.347

−0.034

0.707

0.057

C/P

0.702

0.413

0.222

−0.236

0.769

0.062

C/N

0.445

−0.273

0.621

−0.096

0.667

0.054

pH

−0.095

0.223

0.850

0.224

0.832

0.067

Eigenvalue (math.)

6.094

3.053

2.064

1.186

  

Variance contribution/%

38.085

19.080

12.903

7.415

  

Cumulative contribution/%

38.085

57.165

70.068

77.482

  
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