More links and websites
This page on the Taranaki Regional Council site links to information about tree species for shade, shelter and conservation. Choose a species from the drop-down list.
More suggestions and sources
Gregory, N. G. ‘The role of shelterbelts in protecting livestock: a review.’ New Zealand Journal of Agricultural Research 38 (1995): 423–450.
Price, W. L. ‘Hedges and shelter belts on the Canterbury Plains, New Zealand: transformation of an antipodean landscape.’ Annals of the Association of American Geographers 83, no. 1 (1993): 119–140.