soil map units where 89A Ono is dominant
Soil properties
| Property | Value |
|---|---|
| Geographic distribution | Rotuma |
| Landscape position | Young volcanic hill country in the lowlands and foothills |
| Soil parent material | basaltic ash |
| Slope | Flat to gently undulation (0-3°). Smooth microrelief. |
| Surface outcrops | Few surface rock outcrops. Few surface stones. |
| Brief soil profile description | - |
| Soil profile texture | 0-25cm heavy silt loam. 25-125cm loam |
| Minimum effective rooting depth | >125cm |
| Soil pH (acidity) | 0-12cm moderately acid. 12-60cm slightly acid. 60-125cm moderately acid. |
| Salinity | Non saline. |
| Soil fertility under natural conditions | Potassium (K) very low below 12cm. Nitrogen (N) very low below 25cm. Extremely high phosphorus retention. |
| Soil moisture regime | udic/perudic |
| Susceptibility to drought | In normal years soil moisture deficits are never experienced. |
| Soil drainage | Well drained. |
| Susceptibility to waterlogging | Never waterlogs. |
| Susceptibility to flooding | Never floods. |
