soil map units where 100B Hafhafu is dominant
Soil properties
| Property | Value |
|---|---|
| Geographic distribution | Rotuma |
| Landscape position | Young volcanic hill country in the lowlands and foothills |
| Soil parent material | young aa lava |
| Slope | Undulating (4-7°). Very uneven microrelief due to protruding rock outcrops and boulders. |
| Surface outcrops | Surface rock outcrops cover 10-15% of the area. Surface boulders and stones cover 12-15% of the area. |
| Brief soil profile description | - |
| Soil profile texture | 0-58cm stony loam. 58-100cm+ stony loamy sand. |
| Minimum effective rooting depth | <100cm. Profuse (>75%) boulders below 15cm. |
| Soil pH (acidity) | 0-100cm slightly acid. |
| Salinity | Non saline. |
| Soil fertility under natural conditions | Potassium (K) very low below 15cm. Very high phosphorus retention. |
| Soil moisture regime | udic/perudic |
| Susceptibility to drought | In normal years soil moisture deficits are never experienced. |
| Soil drainage | Somewhat excessively drained. |
| Susceptibility to waterlogging | Never waterlogs. |
| Susceptibility to flooding | Never floods. |
