soil map units where 58A Rawiti is dominant
Soil properties
| Property | Value |
|---|---|
| Geographic distribution | Vanua Levu |
| Landscape position | Secondary floodplains and depressions in the lowlands and foothills |
| Soil parent material | river alluvium from andesitic rocks |
| Slope | Flat to gently undulating (0-3°). Slight alluvial ridge and swale microrelief. |
| Surface outcrops | No surface rock outcrops. No surface stones or boulders. |
| Brief soil profile description | - |
| Soil profile texture | 0-15cm silty clay. 15-21cm clay. 21-29cm silt loam. 29-37cm clay loam. 37-125cm+ clay. |
| Minimum effective rooting depth | <125cm. Note high seasonal water table. |
| Soil pH (acidity) | 0-125cm strongly acid. |
| Salinity | Non saline. |
| Soil fertility under natural conditions | Potassium (K) very low throughout. |
| Soil moisture regime | ustic |
| Susceptibility to drought | In normal years soil moisture deficits of up to 30-40 days are experienced sometime in the period May to October. |
| Soil drainage | Imperfectly drained. |
| Susceptibility to waterlogging | Water table fluctuates from 50cm depth (summer months) to 150cm depth (winter months). |
| Susceptibility to flooding | Floods (water only) on average twice sometime in the period November to April. Flood sedimentation events have a 1 in 15 year return period. |
