soil map units where Ft Fatai soils is dominant
Soil properties
| Property | Value |
|---|---|
| Geographic distribution | Tongatapu |
| Landscape position | Low-lying coastal areas. |
| Soil parent material | - |
| Slope | Flat |
| Surface outcrops | - |
| Brief soil profile description | 0-30 Very dark grey to reddish brown; friable clay;30-75 Dark brown firm clay; black Mn concretions;75-150 Dark brown friable clay; red mottles; many weathered lapilli. |
| Soil profile texture | - |
| Minimum effective rooting depth | 200 cm |
| Soil pH (acidity) | Near neutral |
| Salinity | - |
| Soil fertility under natural conditions | Very high Base saturation (%), calcium (Ca), magnesium (Mg), potassium (K); very low reserve potassium (K); organic carbon (C) and total nitrogen (N) low; sulphur (S) very low. |
| Soil moisture regime | - |
| Susceptibility to drought | - |
| Soil drainage | Imperfectly to poorly drained |
| Susceptibility to waterlogging | - |
| Susceptibility to flooding | - |
