68 - Poukawa - Dominant Soil @ Map Scale 1:50000
| Associated Soil/s |
29, 32 may also be found within this area (68) if a more detailed survey was carried out. |
| Soil Properties of Dominant Soil/s |
|
| Parent material |
Flaxmere age alluvium from greywacke over peat |
| Characteristics of site |
Swamp |
| Soil features |
Silt loam over peat |
Natural drainage
Depth to water table for most of the year |
Very poor
At surface |
| Potential rooting depth, texture, and limiting layer |
30-45 cm silt loam on peat |
| Available water capacity |
50-75 mm |
| Infiltration rate |
Slow |
| Permeability rate |
Slow to very slow |
| Susceptibility to pugging and compaction when wet |
Very high |
| Susceptibility to wind erosion when dry |
Low |
| Unfavourable soil characteristics |
Very poor drainage
Slow infiltration
Very slow permeability
Topsoil easily compacted causing slow infiltration |
Soil Management of Dominant Soil/s
| Artificial drainage: drain spacing |
5 - 10 m
Water table must not be lowered too much because the peat will dry out and oxidize - lowering the surface |
|
Cultivate when moist to avoid compaction
|
68 |
| Irrigation |
N/A |
Poukawa (68) (photo E. Griffiths)