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acres advance-growth Africa Agriculture Annual Report Association Australia average blackbutt Brachystegia Britain British British Columbia British Honduras caribaea cent Commonwealth Forestry conifers Conservator of Forests costs countries crown damage density Department of Forestry diameter disease economic effect established eucalypts exploitation export fire Forest Department forest industries forest management forest products Forest Service Forestry Commission girth Government growing stock growth hardwood important improvement increase increment interest investment Kenya land latewood lignotubers logging ment miles million mycorrhiza Nigeria organisation paper patula pine Pinus Pinus caribaea plantations planting plywood problems programme projects pulp Queensland rainfall range recently recorded regeneration regrowth Review samples savanna sawmilling schedule seed seedlings selection silvicultural slash burning softwood soil species square miles stands stems Tanzania thinning timber tion tracheid trade treatment trees Trinidad tropical utilisation volume West Irian wood woodland yield Zambia Zealand