Table 2 Characteristic roots and contribution rate of each component.

From: Study of the distribution of Glycyrrhiza uralensis production areas as well as the factors affecting yield and quality

Variable

Characteristic root

Contribution rate (%)

Cumulative contribution rate (%)

 × 1

3.450191

0.2654

0.2654

 × 2

2.854394

0.2196

0.485

 × 3

1.574115

0.1211

0.6061

 × 4

1.361012

0.1047

0.7107

 × 5

1.17486

0.0904

0.8011

 × 6

0.984552

0.0757

0.8769

 × 7

0.811124

0.0624

0.9392

 × 8

0.43306

0.0333

0.9726

 × 9

0.184302

0.0142

0.9867

 × 10

0.100472

0.0077

0.9945

 × 11

0.04996

0.0038

0.9983

 × 12

0.016399

0.0013

0.9996

 × 13

0.005561

0.0004

1

  1.  × 1, altitude; × 2, longitude; × 3, latitude; × 4, annual average temperature; × 5, average temperature in July; × 6, highest temperature in the warmest month; × 7, annual precipitation; × 8, precipitation in the driest season; × 9, soil pH; × 10, soil available water grade; × 11, soil cation exchange capacity; × 12, soil organic carbon content; and × 13, growth years.
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