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New Zealand Journal of Forestry (1989) 34(2): 19–22
©New Zealand Institute of Forestry

Research article
The upper limits of radiata pine stem-volume production in NZ

R.G. Shula

For radiata pine in New Zealand, 43 m3lhalyr is the estimated upper limit of stem-volume production rate calculated as the average of a dataset (0.24% of a total database) having a mean annual increment greater than 40m31 halyr. This dataset was derived from more than 56,000 research records in the Forest Research Institute's Permanent Sample Plot system. Excluded from the PSP system are very young plots representative of the most recent genetically improved breeds of radiata pine. The single greatest production rate was 52m3lhalyr at stand age 24 years, while the single greatest stem-volume production was 2188m3/ha at stand age 49 years. This article includes descriptions of the growing conditions and management practices under which these upper limits were achieved
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