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Table 7 Pearson’s correlation coefficient test of significance and distance covariance test of independence of biomass expansion factors (BEF) on total tree height (TH) in A. johnsonii

From: Tree component biomass expansion factors and root-to-shoot ratio of Lebombo ironwood: measurement uncertainty

BEF vs. TH

  

Pearson’s correlation test

Distance covariance test of independence

#

Tree component

r

Probability

dcov

dcor

Probability

1

Taproot + stump

– 0.5353

3.2E-08

0.1106

0.5672

0.0150

2

Lateral roots

– 0.0055

0.9585

0.0516

0.2679

0.1550

3

Root system (1 + 2)

– 0.3936

9.5E-05

0.0918

0.4009

0.0150

4

Stem wood

– 0.0337

0.7486

0.0370

0.1562

0.6350

5

Stem bark

– 0.1564

0.1345

0.0249

0.1636

0.5250

6

Stem (4 + 5)

– 0.0988

0.3461

0.0439

0.1833

0.3750

7

Branches

– 0.2233

0.0314

0.0844

0.2334

0.2400

8

Foliage

– 0.6306

1.2E-11

0.0835

0.6386

0.0150

9

Crown (7 + 8)

– 0.3057

0.0029

0.1089

0.2910

0.0600

10

Shoot system (6 + 9)

– 0.3220

0.0016

0.1131

0.2911

0.1300

11

Total tree (3 + 10)

– 0.3691

0.0003

0.1495

0.3376

0.0400

  1. The major components and their values are indicated in bold font. r, Perason’s correlation coefficient; dcov, distance covariance; dcor, distance correlation; probability refers to the significance of the test.