soil map units where Fo3 Foa soils, mottled phase is dominant
Soil properties
| Property | Value |
|---|---|
| Geographic distribution | Ha'apai |
| Landscape position | Young ash around coastal fringe in centre of Foa and Ha'ano islands. |
| Soil parent material | - |
| Slope | Flat to very gently undulating (0-3°) |
| Surface outcrops | - |
| Brief soil profile description | 0-30 cm Dark reddish brown friable clay; 30-70 cm Dark reddish brown friable to firm clay with clay coatings. |
| Soil profile texture | - |
| Minimum effective rooting depth | 90 cm |
| Soil pH (acidity) | Slightly acid to moderately alkaline |
| Salinity | - |
| Soil fertility under natural conditions | Low organic carbon (C) and nitrogen (N); medium to low P; high to medium phosphorus (P) retention; very high Base saturation (%), exchangeable calcium (Ca), magnesium (Mg) and high sodium (Na) values; low reserve potassium (K) and high reserve magnesium (Mg). |
| Soil moisture regime | - |
| Susceptibility to drought | - |
| Soil drainage | Imperfectly drained |
| Susceptibility to waterlogging | - |
| Susceptibility to flooding | - |
