13 - Karamu
Soil Properties
| Parent material |
Water deposit (alluvium) from greywacke and/or sandstone |
| Characteristic site and soil features |
Upper part of flood plain between levee (soils 5) and lower flood plain (soils 14,15); >100cm to Taupo pumice alluvium with >30cm silt loams/clay loams on sand. Differs from 16 in having heavier (more clayey) topsoil |
| Associated soils not shown within map unit at map scale but separated out in more detailed maps. - Sample Location |
5, 14, 15
G, I |
| Natural drainage and depth to gley and hence to water table after wet periods |
13, 13s moderate - 60-90cm |
| Potential rooting depth, texture, and limiting layer |
13 45-60cm silt loam/clay loam on sand
13s 30-45cm silt loam/clay loam on sand |
| Available water capacity |
13 50-75mm
13s 30-50mm |
| Infiltration rate |
13 if not compacted - moderate
if compacted - slow
13s moderate |
| Permeability rate |
Rapid |
| Susceptibility of topsoil to pugging and compaction |
13, very high
13S, high |
| Unfavourable soil characteristics |
13 heavy topsoil in lower areas - easily
compacted, difficult to work, good tilth
only achieved in right moisture conditions
slow infiltration
13s topsoil silty and easily compacted
rapid permeability |
Soil Management
| Artificial drainage: drain spacing |
13, 40m
13s, 60-80m |
| Cultivate when moist to avoid: compaction |
13, 13s |
Irrigation:-
Recommended method
application rate
Dripper spacing for continuous wetted strip
Amount and frequency |
13 sprinkler to prevent waterlogging
13 slow - <4mm/hr
13, 13s 60cm if 4 l/hr drippers used
13 little (15-25mm), often to prevent surface
ponding
13s little (15-25mm), often to prevent water loss |
Karamu silt loam/clay loam(13,13s) (photo J. Watt)