soil map units where Av Ava soils is dominant
Soil properties
| Property | Value |
|---|---|
| Geographic distribution | Ha'apai |
| Landscape position | Rewashed ash in closed sinkhole depressions and hollows on Nomuka Island. |
| Soil parent material | - |
| Slope | Flat |
| Surface outcrops | - |
| Brief soil profile description | 0-35 cm Very dark greyish brown friable clay to clay loam; 35-70 cm brown mottled firm clay to clay loam on greyish brown mottled massive and firm clay. |
| Soil profile texture | - |
| Minimum effective rooting depth | <70 cm |
| Soil pH (acidity) | Moderately acid |
| Salinity | - |
| Soil fertility under natural conditions | Not analysed |
| Soil moisture regime | - |
| Susceptibility to drought | - |
| Soil drainage | Imperfectly to poorly drained |
| Susceptibility to waterlogging | Poor natural drainage. |
| Susceptibility to flooding | May flood in wet summer months |
