Afforestation in the Otago Land District

Authors: K.W. Prior, R.W. Washbourn, R.M. Priest
Publication: New Zealand Journal of Forestry, Volume N.Z.J.For. 1959, Issue N.Z.J.For. 8(5) 1963, pp 707-727, Dec 1963
Publisher: New Zealand Institute of Forestry

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Abstract: The present and potential importance of different exotic tree species, for each of eight recognized zones of a portion of the Otago Land District, have been investigated. The exotic forests within the area consist largely of five main species:Pinus radiata, Pinus nigra var. calabrica, Pinus ponderosa, Pseudotsuga taxifolia, and Larix decidua. In shelterbelts Cupressus macrocarpa and Populus nigra var. italica are widely planted species. The coastal and neighbouring hill sites, with Pinus radiata as the major species, are particularly suitable for large-scale afforestation projects. In inland zones the proportion of sites suitable for Pinus radiata rapidly decreases, particularly at altitudes above 1,000 ft. On these inland sites, at altitudes up to 2,500 ft, Pinus nigra var. calabrica and Pinus ponderosa produce excellent stands. The heavy, poorly drained soils of coastal areas restrict the use of Pseudotsuga taxifolia; this species thrives in the vicinity of the lakes to the west of the district. Larix decidua will not grow satisfactorily in the driest zones or above 2,500 ft and grows well only in limited areas in other zones. On poorly drained alluvial soils the hardwoods, particularly Populus nigra var. italica, are the most successful species. Where rainfall is less than 20 in., or at altitudes above 2,500 ft, investigations with hitherto untried species should be made.

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