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Table 4 Linear regression test for dependence of biomass expansion factors (BEF) on diameter at breast height (DBH) in A. johnsonii

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

BEF = b 0 + b 1 DBH
# Tree component b 0 (± SE) b 1 (± SE) Probability Adjusted R 2
1 Taproot + stump 0.1890 (±0.0115) – 0.0027 (±0.0006) 0.0000 0.1768
2 Lateral roots 0.0789 (±0.0125) 0.0021 (±0.0007) 0.0017 0.0933
3 Root system (1 + 2) 0.2679 (±0.0175) – 0.0006 (±0.0009) 0.4963 – 0.0058
4 Stem wood 0.6482 (±0.0176) 0.0005 (±0.0009) 0.5911 – 0.0078
5 Stem bark 0.0798 (±0.0075) – 0.0002 (±0.0004) 0.6314 – 0.0084
6 Stem (4 + 5) 0.7280 (±0.0179) 0.0003 (±0.0009) 0.7435 – 0.0098
7 Branches 0.2821 (±0.0376) 0.0006 (±0.0020) 0.7583 – 0.0099
8 Foliage 0.0557 (±0.0055) – 0.0018 (±0.0003) 0.0000 0.2870
9 Crown (7 + 8) 0.3378 (±0.0411) – 0.0012 (±0.0021) 0.5838 – 0.0076
10 Shoot system (6 + 9) 1.0658 (±0.0445) – 0.0009 (±0.0023) 0.7080 – 0.0094
11 Total tree (3 + 10) 1.3336 (±0.0574) – 0.0015 (±0.0030) 0.6192 – 0.0082
  1. The major components and their values are indicated in bold font. b0 and b1, regression parameters; SE, standard error; probability refers to the significance of the regression.
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