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An ethnobotanical study of the effect of sand and gravel addition to soils on soil temperature and plant growth : a dissertation submitted in partial fulfilment of the requirements for the degree of Bachelor of Agricultural Science at Lincoln University
(Lincoln University, 1993)
Kumara (Ipomoea batatas) being of tropical origin, was introduced to temperate Aotearoa/New Zealand by the Polynesian ancestors of the Maori. The pre-European kumara varieties were successfully cultivated in Aotearoa, at ...