From: Model-based estimation of above-ground biomass in the miombo ecoregion of Zambia
Predictor variable | Description | Minimum | Maximum | Mean |
---|---|---|---|---|
Available soil water capacity (AWC) | Volumetric fraction | 12.1 | 15.2 | 14.0 |
Bulk density (Bulk) | kg∙m−3 | 1299.6 | 1501.2 | 1378.9 |
Carbon | Organic soil carbon content (g∙kg−1) | 4.3 | 11.5 | 7.0 |
Cation Exchange Capacity (CEC) | cmolc∙kg−1 | 7.7 | 21.8 | 12.3 |
Clay | Percent volume | 21.5 | 35.1 | 28.7 |
Coarse fragments (Crs.frg) | Percent volume | 2.2 | 17.0 | 9.5 |
Compound Topographic Index (CTI) | Unitless. High values indicate higher potential soil moisture. | 5.8 | 39.6 | 8.2 |
Distance from ground plot to district capital (D2cap) | Euclidean distance (m) | 5704 | 90,146 | 40,635 |
Distance from ground plot to nearest perennial river/stream (D2hydro) | Euclidean distance (m) | 91 | 26,194 | 7203 |
Distance from ground plot to nearest village or settlement (D2vill) | Euclidean distance (m) | 542 | 42,902 | 8948 |
Distance from ground plot to nearest improved road (D2road) | Euclidean distance (m) | 192 | 59,363 | 12,042 |
Fire history – early season (Fire.early) | Total number of fires per pixel, Apr. 1 – Jul. 31 | 0.0 | 6.0 | 0.6 |
Fire history – late season (Fire.late) | Total number of fires per pixel, Aug. 1 – Nov. 30 | 0.0 | 8.0 | 1.8 |
pH | Unitless | 59.0 | 67.8 | 62.6 |
Sand | Percent volume | 43.4 | 66.2 | 54.3 |
Silt | Percent volume | 9.9 | 22.8 | 17.0 |
Slope | Percent | 0.0 | 43.8 | 8.4 |