Bluegum eucalyptus is considered a  fast-growing tree in most countries where it is used, but a wide  range of growth and yield figures are reported in the literature.  We know of no data for natural stands in Australia, but some  plantations in Tasmania, Victoria, and the Australian Capital  Territory (A.C.T.) have done well (3). In Tasmania, a yield of  subspecies globulus at 17 years of 35 m³/ha (500 ft³/acre)  per year was reported, with the tallest trees averaging 30 m (99  ft). A plantation of ssp. globulus in Victoria averaged  about 20 ern (8 in) in d.b.h. and 18 m (59 ft) in height at 14  years, while another (ssp. bicostata) at Canberra,  A.C.T., at age 13 and somewhat lower stocking, averaged 21 cm  (8.3 in) in d.b.h. and 15.5 m (51 ft) in height (3).

    These data are well within the range of those reported for other  countries (8). Annual growth in northwestern Spain averages 20 m³  /ha (286 ft³/acre), but in southwestern Spain only 5 to 6 m³/ha  (71 to 86 ft³ /acre). In Uruguay, 25 m³/ha (375 ft³  /acre) of annual growth is considered good. In Ethiopia and  Portugal, at age 10 on the highest quality site, very good growth  is 20 m³/ha (286 Wft³/acre) per year.

    In California, 67 different stands were measured in 1924 (19). The  mean annual growth of all these stands ranging from 2 to 42 years  in age, was 19 m³/ha (271 ft³/acre). Ten of these  stands, ranging from 13 to 16 years in age and similar to the  plantation in Australia, averaged 19.6 cm (7.7 in) in d.b.h., and  20.4 m (67 ft) in height, and had a mean annual growth of 21 m³/ha  (300 ft³ /acre). The tallest stand averaged 38.7 m (127 ft)  at 23 years. The tallest stand in California is one planted in  1877 on the University of California campus at Berkeley; it  contains trees that have been more than 61 rn (200 ft) tall since  1956 (1).

    In Hawaii, 20 stands ranging in age from 2.5 to 35 years were  evaluated in 1911 (18). Four of the stands were in the age range  11 to 20, somewhat similar to the plantations in Australia. In  these four, the average d.b.h. was 29.2 cm (11.5 in), and average  height was 23 m (76 ft). The tallest stand averaged 30.5 m (100  ft) at 14 years. Seven stands ranging in age from 5 to 20 years  had an average annual yield of 20 m³/ha (286 ft³/acre).  The tallest bluegurn eucalyptus trees in Hawaii were at Kukaiau  Ranch, on the Island of Hawaii, and were about 61 m (200 ft) tall  until logged at age 70.