soil map units where Fg Fungamafa soils is dominant
Soil properties
| Property | Value |
|---|---|
| Geographic distribution | Niuatoputapu |
| Landscape position | Basaltic andesite lava on central ridge and upper terrace. |
| Soil parent material | - |
| Slope | Rolling (12-15°) to |
| Surface outcrops | - |
| Brief soil profile description | 0-20 cm Dark brown friable clay; 20-50 cm Dark brown firm clay; 50-100 cm Strong brown friable silty clay;100+ Consolidated rock. |
| Soil profile texture | - |
| Minimum effective rooting depth | 100 cm |
| Soil pH (acidity) | Slightly alkaline |
| Salinity | - |
| Soil fertility under natural conditions | Organic carbon (C) and nitrogen (N) values low; phosphorus (P) and total phosphorus (P) are very high; sulphur (S) values medium; Base saturation (%) and calcium (Ca) very high; potassium (K)high and sodium (Na) medium. |
| Soil moisture regime | - |
| Susceptibility to drought | - |
| Soil drainage | Well drained |
| Susceptibility to waterlogging | - |
| Susceptibility to flooding | - |
