soil map units where 40D Bua is dominant
Soil properties
| Property | Value |
|---|---|
| Geographic distribution | Viti Levu and Vanua Levu |
| Landscape position | Plateau in the lowlands and foothills |
| Soil parent material | basic and intermediate rocks |
| Slope | Rolling (12-15°). Uneven microrelief. |
| Surface outcrops | No surface rock outcrops. Common lag gravels. |
| Brief soil profile description | - |
| Soil profile texture | 0-20cm friable gravelly clay loam. 20-62cm firm gravelly clay loam. 62-125cm friable clay loam. |
| Minimum effective rooting depth | >125cm. Note very low subsoil nutrient status and aluminium toxicity. |
| Soil pH (acidity) | 0-125cm strongly acid. Note variable charge. |
| Salinity | Non saline. |
| Soil fertility under natural conditions | Very low nitrogen (N) and potassium (K). Also, possible aluminium (Al) toxicity. |
| Soil moisture regime | ustic |
| Susceptibility to drought | In normal years soil moisture deficits of >120 days are experienced sometime in the period May to October. |
| Soil drainage | Well drained. |
| Susceptibility to waterlogging | Never waterlogs. |
| Susceptibility to flooding | Never floods. |
