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Table 8 Biomass density ( W h ), variance (VAR Wh ), standard error (SE), and 95% confidence intervals (CI) for each component in Androstachys johnsonii trees

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

# Tree component W h (Mg ha –1 ) VAR Wh (Mg 2 ha –2 ) SE (Mg ha –1 ) SE (%) 95% CI (Mg ha –1 ) 95% CI (%)
1 Taproot + stump 16.2192 0.4725 0.6874 4.2382 ±1.3748 ±8.4764
2 Lateral roots 13.4005 0.5882 0.7669 5.7232 ±1.5339 ±11.4465
3 Root sytem (1 + 2) 29.6197 1.3296 1.1531 3.8930 ±2.3062 ±7.7860
4 Stem wood 75.7526 4.8413 2.2003 2.9046 ±4.4006 ±5.8092
5 Stem bark 8.8182 0.1757 0.4192 4.7534 ±0.8383 ±9.5068
6 Stem (4 + 5) 84.5708 5.8565 2.4200 2.8615 ±4.8400 ±5.7230
7 Branches 33.7612 4.1845 2.0456 6.0590 ±4.0912 ±12.1180
8 Foliage 2.7923 0.0880 0.2967 10.6242 ±0.5933 ±21.2483
9 Crown (7 + 8) 36.5535 4.8058 2.1922 5.9973 ±4.3844 ±11.9946
10 Shoot system (6 + 9) 121.1243 15.3491 3.9178 3.2345 ±7.8356 ±6.4690
11 Total tree (3 + 10) 150.7440 24.3521 4.9348 3.2736 ±9.8696 ±6.5472
  1. The major components and their values are indicated in bold font. SE, standard error; CI, confidence limit.
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