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We will immediately head south to the market
gardening area surrounding Pukekohe , to discuss soil resilience, erosion and
urbanisation issues focussing on the Pukekohe silt loam (Typic/Andic
Kandiudult) formed on the slopes of an old basaltic cone overlaying even older
marine terraces. Now heading south-east we will arrive for lunch in Tirau, a
centre of intensive pastoral farming. Here we will view the Tapapa section , a
classic Andisol in distal composite tephras [Tirau soil, ( Typic Hapludand)],
where the profile records tephric loess and buried soil horizons dating back
230,000 yrs. We complete the day with a trip to view geothermally heated horticultural
crops, and a trip towards sunset around Lake Taupo
to overnight in Turangi. Bring swimming wear for hot pool bathing
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