soil map units where Hi2 Ha'apai soils, rolling phase is dominant
Soil properties
| Property | Value |
|---|---|
| Geographic distribution | Ha'apai |
| Landscape position | Older ash on raised coral limestone terrace. |
| Soil parent material | - |
| Slope | Gently undulating (3-5°) |
| Surface outcrops | - |
| Brief soil profile description | 0-20 cm Very dark brown friable clay; 20-50 cm Brown firm, plastic clay with clay coatings;on brown firm, plastic clay. |
| Soil profile texture | - |
| Minimum effective rooting depth | 75 cm |
| Soil pH (acidity) | Slightly acid to near neutral |
| Salinity | - |
| Soil fertility under natural conditions | Low organic carbon (C) and nitrogen (N) values; low phosphorus (P); high Base saturation (%), calcium (Ca), magnesium (Mg) and nitrogen (N); low reserve potassium (K) and high reserve magnesium (Mg). |
| Soil moisture regime | - |
| Susceptibility to drought | - |
| Soil drainage | Moderately well drained |
| Susceptibility to waterlogging | - |
| Susceptibility to flooding | - |
