21, 21G - Irongate - Dominant Soil @ Map Scale 1:50000
| Associated Soil/s |
2, 56 may also be found within these areas (21, 21g) if a more detailed survey was carried out. |
| Soil Properties of Dominant Soil/s |
|
| Parent material |
Flaxmere age alluvium from greywacke |
| Characteristics of site |
Young flood channels in historical times |
| Soil features |
Mostly shallow sandy/silt deposits over stones |
Natural drainage
Depth to gley and hence to water table after wet periods |
Poor
<30 cm |
| Potential rooting depth, texture, and limiting layer |
21 – 45–60 cm sandy loam/silt loam on stones
21g – 30-45 cm sandy loam/sand on stones |
| Available water capacity (AWC) |
21 – 50–75 mm
21g – 25-45 mm |
| Infiltration rate |
21 – moderate
21g - rapid if sand topsoil |
| Permeability rate |
Very rapid |
| Susceptibility to pugging and compaction when wet |
21 - moderate |
| Susceptibility to wind erosion when dry |
21g - high if sand topsoil |
| Unfavourable soil characteristics |
Poor drainage
21g - low AWC
21g - rapid infiltration if sand topsoil
Very rapid permeability |
Soil Management of Dominant Soil/s
| Artificial drainage - drain spacing |
Low position subject to flooding
Drainage difficult because of low position
21, 21g – 60–80 m |
|
Cultivate when moist to avoid wind erosion
|
21g - if sand topsoil |
Irrigation:-
Recommended method
Dripper spacing for continuous wetted strip
Amount and frequency |
Sprinkler to prevent water loss
If 4 l/hr drippers used
21 – 40 cm
21g – 30 cm
21g – 15-25 mm often to prevent water loss |
Irongate (21,21g) (photo K. Vincent)