Ahuriri

69 - Ahuriri

Soil Properties

Parent material	Saline lagoon deposits
Characteristic site and soil features	in old lagoon raised in 1931; variable soils from clay loams in hollows to shells on ridges
Associated soils not shown within map unit at map scale but separated out in more detailed maps. - Sample Location	29
Natural drainage and depth to gley and hence to water table after wet periods	Very poor 0cm
Potential rooting depth, texture, and limiting layer	69A    30-45cm clay loam on shelly sand 69B    45-60cm sandy loam on shelly sandy loam 69C    30-45cm silt loam on shelly sand 69D    30-45cm sand on shelly sand 69E    <30cm sand on shelly gravels
Available water capacity (AWC)	69A     30-50mm 69B     50-75mm 69C     50-75mm 69D     20-30mm 69E     15mm
Infiltration rate	69A      slow 69B      moderate 69C      moderate 69D      rapid 69E      very rapid
Permeability rate	69A      slow 69B      slow 69C      slow 69D      very rapid 69E      very rapid
Susceptibility of topsoil to pugging and compaction when wet	69A      extremely high 69B      moderate 69C      very high 69D      low 69E       very low
Susceptibility to wind erosion when dry	69D      high 69E      high
Unfavourable soil characteristics	all         saline 69A      heavy topsoil easily compacted and difficult to              manage in wet conditions, slow infiltration and               permeability 69B     slow permeability 69C     silty topsoil difficult to manage in wet conditions,               slow permeability 69D     topsoil susceptible to wind erosion, low AWC,               rapid infiltration, very rapid permeability 69E      topsoil susceptible to wind erosion, shells at               surface, very low AWC, very rapid infiltration

 

Soil Management

Artificial drainage: drain spacing	69A, 69B, 69C, 69D, 69E   20-40m
Cultivate when moist to avoid: compaction wind erosion	69A, 69C 69D, 69E
Irrigation:- recommended method Dripper spacing for continuous wetted Strip Amount and frequency	69A, 69C    sprinkler to prevent waterlogging 69D             sprinkler to prevent water loss if 4 l/hr drippers used 69A, 69C - 60cm, 69B - 40cm, 69D - 15-20cm, 69E - N/A 69D - little (15-25mm), often to prevent water loss

 
Ahuriri (69) (photo D. Bloomer)