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acres Africa agri-silviculture Agriculture annual applications Araucaria Australia basal area British Canada caribaea cent Chairman Committee COMMONWEALTH FORESTRY ASSOCIATION conifers Conservator cost countries crop culms Department diameter economic established estimated Eucalyptus export felling Fiji forest industries forest management forest products Forest Research forest resources Forest Service forest trees Forestry Commission Ghana Government growth hardwoods HARRY CHAMPION hectares height important increase India Islands land LATHAM logs London major material measured ment million m3 Nigeria nursery operations Oxford Papua New Guinea pine Pinus planning plantations planting plots potential present problems programme recorded region Review ROYAL COMMONWEALTH SOCIETY sampling sawmills sawn second rotation seed silvicultural Sir Stuart soil species spruce stands supply survey Swaziland Table techniques timber timber trade tion Trade Federation trials tropical high forest Uganda USSR utilisation Viti Levu volume wood Zealand