soil map units where Hf Ha'afeva soils is dominant
Soil properties
| Property | Value |
|---|---|
| Geographic distribution | Ha'apai |
| Landscape position | Young ash on raised terrace in centre of Ha'afeva Island. |
| Soil parent material | - |
| Slope | Very gently undulating (3°) |
| Surface outcrops | - |
| Brief soil profile description | 0-55 cm Dark reddish brown friable silt loam with small lapilli; 55-75 cm Dark reddish brown loose gravelly sandy loam with abundant lapilli. |
| Soil profile texture | - |
| Minimum effective rooting depth | 75 cm |
| Soil pH (acidity) | Slightly alkaline |
| Salinity | - |
| Soil fertility under natural conditions | Topsoil organic carbon (C) and nitrogen (N) are low; phosphorus (P) low; Base saturation (%), exchangeable calcium (Ca) and magnesium (Mg) very high. Exchangeable potassium (K) and reserve potassium (K) low. |
| Soil moisture regime | - |
| Susceptibility to drought | - |
| Soil drainage | Well drained |
| Susceptibility to waterlogging | - |
| Susceptibility to flooding | - |
