These are some of the most productive dairying and cropping soils in the Waikato. Derived from volcanic ash and free draining, these soils need large amounts of phosphate fertiliser because they contain allophane, a fine clay that holds phosphate and releases it only slowly to plants.
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New Zealand Society of Soil Science
Reference: Les Molloy, Soils in the New Zealand landscape: the living mantle. Wellington: Mallinson Rendel, 1988, plate 3.10
by Quentin Christie
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