Table 4 Weights of principal component contributions and soil fertility quality indexes.

From: Comprehensive evaluation of soil quality in a desert steppe influenced by industrial activities in northern China

Evaluation index

PCA1

PCA2

PCA3

Capacity

Weight

Capacity

Weight

Capacity

Weight

TN

0.722

0.308

0.436

0.224

0.023

0.018

TP

0.617

0.263

0.382

0.196

0.042

0.033

AP

0.098

0.042

0.906

0.465

0.024

0.019

AK

0.809

0.345

0.200

0.102

0.221

0.170

SOM

0.097

0.042

0.025

0.013

0.985

0.760

Variance contribution rate %

39.067

21.538

15.238

Cumulative variance contribution rate %

39.067

60.605

75.843

  1. TN total nitrogen, TP total phosphorus, AP available phosphorus, AK available potassium, SOM soil organic matter.
Back to article page