soil map units where 15A Vunilagi is dominant
Soil properties
| Property | Value |
|---|---|
| Geographic distribution | All islands |
| Landscape position | Depressions behind the beach on the coastal margins |
| Soil parent material | river alluvium over calcareous sands |
| Slope | Flat to gently undulating (0-2°). Smooth microrelief. |
| Surface outcrops | No surface rock outcrops. No surface stones or boulders. |
| Brief soil profile description | - |
| Soil profile texture | 0-69cm clay. 69-100cm+ clay loam (with coral shells and gravels). |
| Minimum effective rooting depth | <70cm. Note high seasonal water table. |
| Soil pH (acidity) | 0-16cm slightly alkaline. 16-100cm moderately alkaline. |
| Salinity | Non saline. |
| Soil fertility under natural conditions | Phosphorus (P) very low. |
| Soil moisture regime | aquic |
| Susceptibility to drought | In normal years soil moisture deficits are never experienced. |
| Soil drainage | Poorly drained. |
| Susceptibility to waterlogging | In normal years the water table fluctuates from 40cm (summer months) to 80 cm (winter months). Note also sea level control on water table. |
| Susceptibility to flooding | In normal years infrequent (4-5 per year) short duration (3-4 days) flooding from creeks and during high spring tides can occur sometime in the wet season. |
