soil map units where 1A Labasa is dominant
Soil properties
| Property | Value |
|---|---|
| Geographic distribution | All islands |
| Landscape position | Marine marshes in the lowlands and foothills |
| Soil parent material | estuarine alluvium |
| Slope | Flat to near level (0-1°). Generally smooth microrelief. |
| Surface outcrops | No surface rock outcrops. No surface stones or boulders. |
| Brief soil profile description | - |
| Soil profile texture | 0-40cm silty clay. 40-128cm sandy loam. 128-140cm+ very fine sandy loam. |
| Minimum effective rooting depth | <40cm. Note high water table and salinity plus poor subsoil nutrient status. |
| Soil pH (acidity) | 0-40cm moderately acid. 40-140cm moderately alkaline. |
| Salinity | Moderately saline. |
| Soil fertility under natural conditions | Low phosphorus (P). |
| Soil moisture regime | aquic |
| Susceptibility to drought | Soil moisture deficits are never experienced. |
| Soil drainage | Poorly drained. |
| Susceptibility to waterlogging | Water table fluctuates from 20cm (summer months) to 70cm (winter months), but can be at the surface during flood events. |
| Susceptibility to flooding | In normal years and due to permanent tidal influenced water table infrequent flooding (4-5 times per year) of medium duration (10-12 days) can occur sometime in the period November to April and coinciding with high spring tides. |
