soil map units where Hg1 Hunga soils is dominant
Soil properties
| Property | Value |
|---|---|
| Geographic distribution | Vava’u |
| Landscape position | Ash-mantled coral terrace. |
| Soil parent material | - |
| Slope | Flat to gently undulating (0-5°) |
| Surface outcrops | - |
| Brief soil profile description | 0-28 cm Dark brown to dark reddish brown; firm clay; 28-45 cm Brown to reddish brown firm clay; 45-90 cm Strong Brown to yellowish red firm clay. |
| Soil profile texture | - |
| Minimum effective rooting depth | 90 cm |
| Soil pH (acidity) | Slightly acid |
| Salinity | - |
| Soil fertility under natural conditions | Organic carbon (C) and nitrogen (N) low to medium in topsoil and very low in subsoil; phosphorus (P) very low; Base saturation (%), exchangeable calcium (Ca) and magnesium (Mg) high; reserve potassium (K) low to very low. |
| Soil moisture regime | - |
| Susceptibility to drought | - |
| Soil drainage | Well drained |
| Susceptibility to waterlogging | - |
| Susceptibility to flooding | - |
