soil map units where Ha1 Ha'atua soils is dominant
Soil properties
| Property | Value |
|---|---|
| Geographic distribution | 'Eua |
| Landscape position | Easy rolling surfaces of ash-covered coral limestone terraces. |
| Soil parent material | - |
| Slope | Flat to gently rolling slopes (0-5°) |
| Surface outcrops | - |
| Brief soil profile description | 0-36 cm Dark brown friable clay; 36-80 cm Dark reddish friable brown clay; clay coatings; many Fe-Mn mottles; 80-120 cm Dark reddish brown friable clay; on Coral limestone. |
| Soil profile texture | - |
| Minimum effective rooting depth | 120 cm |
| Soil pH (acidity) | Slightly acid |
| Salinity | - |
| Soil fertility under natural conditions | Organic carbon (C) medium to very low with depth; nitrogen (N) and phosphorus (P) low; phosphorus (P) retention high; Base saturation (%), exchangeable calcium (Ca) and magnesium (Mg) high; sulphur (S) medium to very high; reserve potassium (K) low. |
| Soil moisture regime | - |
| Susceptibility to drought | - |
| Soil drainage | Well drained |
| Susceptibility to waterlogging | - |
| Susceptibility to flooding | - |
