More links and websites
Many articles in the Journal of the Polynesian Society contain information on soil in Māori tradition and practice.
The Royal Society of New Zealand’s site contains many articles relating to the Māori relationship with soil.
More suggestions and sources
Best, Elsdon. Māori agriculture: the cultivated food plants of the natives of New Zealand: with some account of native methods of agriculture, its ritual and origin myths. Wellington: Te Papa, 2005. Smith, S. Percy. The lore of the whare-wānanga, or, teachings of the Māori College on religion, cosmogony and history / written down by H. T. Whatahoro from the teachings of Te Matorohanga and Nepia Pohuhu, priests of the whare-wānanga of the East Coast, New Zealand. Christchurch: Kiwi Publishers, 1998 (first published 1913).