soil map units where 7A Yasawa is dominant
Soil properties
| Property | Value |
|---|---|
| Geographic distribution | All islands |
| Landscape position | Beach dunes of the coastal margins |
| Soil parent material | calcareous sand |
| Slope | Flat to gently undulating (0-2°). Generally smooth but surface hummocks where wind throw has occurred. |
| Surface outcrops | No surface rock outcrops. Common coral surface stone. |
| Brief soil profile description | - |
| Soil profile texture | 60cm medium sand. Medium sand. 60-125cm stony medium sand. |
| Minimum effective rooting depth | >125cm. Low nutrient supply below 10-15cm. |
| Soil pH (acidity) | Moderately alkaline 0-125cm. |
| Salinity | Non saline. Saline water table >125cm near to coastline. |
| Soil fertility under natural conditions | Phosphorus (P) and potassium (K) values very low. Low organic matter status. |
| Soil moisture regime | ustic |
| Susceptibility to drought | In most years soil moisture deficits are experienced for 100 days during the months of May to October. |
| Soil drainage | Excessively drained. |
| Susceptibility to waterlogging | Never waterlogged. Water table >125cm from surface. Water table fluctuates at depth with the tides. |
| Susceptibility to flooding | Never flooded. |
