Growth and Yield
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.
- Burns, Russell M., and Barbara H. Honkala, technical coordinators. 1990. Silvics of North America: 1. Conifers; 2. Hardwoods. Agriculture Handbook 654 (Supersedes Agriculture Handbook 271,Silvics of Forest Trees of the United States, 1965). U.S. Department of Agriculture, Forest Service, Washington, DC. vol.2, 877 pp. http://www.na.fs.fed.us/spfo/pubs/silvics_manual/table_of_contents.htm
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