University of California

Irrigation and planting density affect river red gum growth


Stephen T. Cockerham

Author Affiliations

S.T. Cockerham is Superintendent of Agricultural Operations, UC Riverside. The California Department of Forestry provided partial funding for this project. The author acknowledges the contributions of Paul W. Moore, who was awarded the grant, designed the experiment and established the plots.

Publication Information

Hilgardia 58(1):40-43. DOI:10.3733/ca.v058n01p40. January 2004.

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In a 6-year study, production of river red gum, an excellent fuel-wood source, was evaluated for responses to three levels of irrigation, fertilization and planting density. Irrigation and planting density had the greatest influence on tree growth. Irrigation in the fifth and sixth years produced greater wood volume and weight per tree. Tree size was greatest in the wide spacing of the lower planting density. Fertilizer had no effect on any of the treatments. Per acre volume and weight yields were greater at the higher planting density, while individual tree height, diameter, volume and weight was greater at the low planting density. Growers seeking total wood volume per acre can increase yields with the higher density planting and irrigation.


Apsey TM, Reed FLC. World timber resources outlook: Current perceptions with implications for policy and practice. Commonwealth Forestry Rev. 1996. 75:155-60.

Chippendale GM, Wolf L. The natural distribution of Eucalyptus in Australia. Australian National Parks and Wildlife Service, Canberra. Special Pub No 6. 192 p 1981.

Crabb TB, Melidosian MW, Whitesell CD, Schubert TH. Eucalyptus plantations for energy production in Hawaii: Progress report. 1983. Hilo, HI: Bioenergy Development Corp., US Forest Service and U Hawaii. 120p.

Hartsough BR, Nakamura G. Harvesting eucalyptus for fuel chips. Cal Ag. 1990. 44(1):7-8.

[IUFRO] International Union of Forestry Research Organizations. The future of eucalypts for wood production. Conference Communique. Launceston, Tasmania, Australia 2000.

Jenkins BM, Ebeing JM. Thermochemical properties of biomass fuels. Cal Ag. 1985. 39(3):14-6.

King JP, Krugman SL. Tests of 36 Eucalyptus species in northern California. Res Paper PSW-152. 1980. Berkeley, CA: USDA Forest Service, Pacific Southwest Forest and Range Experiment Station. 6p.

Meskimen GF. Fertilizer tablets stimulate eucalyptus in Florida trial. USDA Forest Service Res Note SE-162. 1971. Asheville, NC: Southeastern Forest Experiment Station. 8p.

Meskimen GF, Franklin EC. Spacing Eucalyptus grandis in southern Florida. Southern J Applied Forestry. 1978. 2(1):3-5.

Metcalf W. Growth of Eucalyptus in California plantations. UC Ag Exp Stn, Bull 380 1924. Berkeley, CA. p.61.

Moore PW, Standiford RB, Ledig FT. Fertilization and irrigation of Eucalyptus in Southern California Proc Workshop on Eucalyptus in California. 1983a. Sacramento, CA. US Forest Service Gen Tech Rep PSW-69. 2.

Moore PW, Standiford RB, Ledig FT. Southern California trial plantings of Eucalyptus Proc Workshop on Eucalyptus in California. 1983b. Sacramento, CA. US Forest Service Gen Tech Rep PSW-69. pp.14-7.

Pillsbury NH, Standiford RB, Costello LR, et al. Wood volume equations for central coast blue gum. Cal Ag. 1989. 43(6):13-4.

Skolmen RG, Standiford RB, Ledig FT. Growth and yield of some Eucalypts of interest in California Proc Workshop on Eucalyptus in California. 1983. Sacramento, CA. US Forest Service Gen Tech Rep PSW-69. 57.

Standiford RB, Donaldson DR, Breece JR. Planting Eucalyptus for firewood. UC Division of Agricultural Sciences, Leaflet 21297. 1982. 4-

Turnbull JW, Pryor LD, Hillis WE, Brown AG. Choice of species and seed sources. Eucalypts for wood production. Division of Building Research, CSIRO. 1978. Melbourne, Australia: p. 6-65.

Cockerham S. 2004. Irrigation and planting density affect river red gum growth. Hilgardia 58(1):40-43. DOI:10.3733/ca.v058n01p40
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