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

Table 3 Component biomass expansion factors (BEF _h ), their variances (VAR _BEF ), standard errors (SE), and 95% confidence intervals (CI) for Androstachys johnsonii trees

#	Tree component	BEF _h (Mg m ^–3 )	VAR _BEF (Mg ² m ^–6 )	SE (Mg m ^–3 )	SE (%)	95% CI (Mg m ^–3 )	95% CI (%)
1	Taproot + stump	0.1407	3.6E-05	0.0060	4.2382	± 0.0119	±8.4764
2	Lateral roots	0.1162	4.4E-05	0.0067	5.7232	±0.0133	±11.4465
3	Root system (1 + 2)	0.2569	1.0E-04	0.0100	3.8930	±0.0200	±7.7860
4	Stem wood	0.6569	3.6E-04	0.0191	2.9046	±0.0382	±5.8092
5	Stem bark	0.0765	1.3E-05	0.0036	4.7534	±0.0073	±9.5068
6	Stem (4 + 5)	0.7334	4.4E-04	0.0210	2.8615	±0.0420	±5.7230
7	Branches	0.2928	3.1E-04	0.0177	6.0590	±0.0355	±12.1180
8	Foliage	0.0242	6.6E-06	0.0026	10.6242	±0.0051	±21.2483
9	Crown (7 + 8)	0.3170	3.6E-04	0.0190	5.9973	±0.0380	±11.9946
10	Shoot system (6 + 9)	1.0504	1.2E-03	0.0340	3.2345	±0.0679	±6.4690
11	Total tree (3 + 10)	1.3072	1.8E-03	0.0428	3.2736	±0.0856	±6.5472

The major components and their values are indicated in bold font. SE, standard error; CI, confidence limit.

ISSN: 1750-0680