Mangateretere

71 - Mangateretere

Soil Properties

Parent material	Water deposit (alluvium) of Tukituki from muddy siltstone
Characteristic site and soil features	Older flood plain with silty loams/clay loams (< 1850BP) over Taupo airfall ash, which overlies clay (a buried topsoil has been found in this clay at one site in Lawn Road)
Associated soils not shown within map unit at map scale but separated out in more detailed maps. - Sample Location	14, 15 L, N
Natural drainage and depth to gley and hence to water table after wet periods	Imperfect 30-60cm
Potential rooting depth, texture, and limiting layer	71 30-60cm silt loam/clay loam on clay from mudstone 71a >60cm silt loam on clays
Available water capacity	71 50-100mm 71a 100mm
Infiltration rate	71, 71a if not compacted - moderate if compacted - slow
Permeability rate	71, 71a slow
Susceptibility of topsoil to pugging and compaction when wet	71 very high 71a high
Unfavourable soil characteristics	71 silty topsoil easily compacted and difficult to manage in wet conditions perched gley on slowly permeable claypan at 30-60 cm 71a as above but >60cm to claypan

Soil Management

Artificial drainage: drain spacing 71, 71a, 10-20m

Cultivate when moist to avoid: compaction 71, 71a

Irrigation:-

Recommended method
Dripper spacing for continuous wetted strip
Amount and frequency 71     sprinkler to prevent waterlogging
71     60cm if 4 l/hr drippers used

          little (25-40mm), often to prevent waterlogging

Mangateretere silt loam (71) (photo J. Watt)