Diameter
Significant differences between provenances were found at Pilot Hill, Myrtlebank, and
Tarraleah (Table 5). Plants at Parrawe were too small for diameter at 1.2 m to be measured
at 3 years of age. At Pilot Hill most of the Victorian provenances and some local New South
Wales provenances were among the leaders. In fact, five out of the top 15 ranking
provenances were from New South Wales. As in the height results, Royston River and Geehi
performed well at this site. All the Tasmanian provenances performed poorly, with the
majority being significantly smaller in diameter than the top 15 provenances in the trial.
At both Myrtlebank and Tarraleah the majority of the better performing provenances for
diameter were from Victoria—in particular, Royston River, Ada River, Mt St Gwinear, and
Mt Useful (Tables 4 and 5). The New South Wales provenances were substantially less
successful at both trial sites whereas a small group of northern Tasmanian provenances were
consistently in the top 15. However, a number of New South Wales and Tasmanian
provenances ranked very poorly at both sites.