soil map units where HpH Halapua soils is dominant
Soil properties
| Property | Value |
|---|---|
| Geographic distribution | Ha'apai |
| Landscape position | Calcareous marl and limestone on raised terraces and hilly land at both ends of Mango Island. |
| Soil parent material | - |
| Slope | Moderately steep (18°-38°) |
| Surface outcrops | - |
| Brief soil profile description | 0-10 cm Very dark brown friable gravelly calcareous clay loam with marl and limestone fragments; on Weakly weathered regolith grading to unweathered marl and limestone. |
| Soil profile texture | - |
| Minimum effective rooting depth | <50 cm (lithic contact) |
| Soil pH (acidity) | Slightly alkaline |
| Salinity | - |
| Soil fertility under natural conditions | Not analysed |
| Soil moisture regime | - |
| Susceptibility to drought | Dries out in winter months. |
| Soil drainage | Excessively drained |
| Susceptibility to waterlogging | - |
| Susceptibility to flooding | - |
