soil map units where 24A Tamanua is dominant
Soil properties
| Property | Value |
|---|---|
| Geographic distribution | Viti Levu |
| Landscape position | Relict channels of the major floodplains in the lowlands and foothills |
| Soil parent material | river alluvium from basic and intermediate rocks |
| Slope | Flat to gently undulating (0-3°). Smooth microrelief. |
| Surface outcrops | No surface rock outcrops. No surface stones or boulders. |
| Brief soil profile description | - |
| Soil profile texture | 0-38cm very fine sandy clay loam. 38-61cm silty clay loam. 61-97cm silty clay. |
| Minimum effective rooting depth | <65cm. Water table at 65cm during part of the wet season. |
| Soil pH (acidity) | 0-38cm moderately acid. 38-97cm slightly acid. |
| Salinity | Non saline. |
| Soil fertility under natural conditions | Very low potassium (K) throughout. |
| Soil moisture regime | udic/perudic |
| Susceptibility to drought | In normal years soil moisture deficits are never experienced. |
| Soil drainage | Imperfectly drained. |
| Susceptibility to waterlogging | Waterlogging below 65cm occurs in most years sometime in the period November to April. |
| Susceptibility to flooding | Floods depositing sediment have a 1 in 10 year return period. Floods (water only) have a 1 in 2 year return period. |
