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acre annual diameter increment AUSTRALIA average Bendigo box and ironbark box and yellow box-ironbark forests box-ironbark poles Box-Ironbark Region cent consists coppice and seedling crop crude oil decade demand for mining dry wood durable timbers economic eucalyptus oil exploitation fairly dense fencing timber Flats and gullies forest areas forest by area forest officer forest produce green wood grey box gullies and flats heavy construction inches D.B.H. large quantities licensed operators loams long rotation major species mallee material to fuelwood Mean Annual Output Mean Maximum Melbourne market mining industry mining timbers month—mean rainfall non-durable species Ordovician and Silurian overstocked overwood poor skeletal soil Postal Department posts prescribed preservative treatment Prisoner-of-war camps purposes railway sleepers red box red ironbark red stringybark royalty value Selection Working Circle silvicultural system silviculturally treated sites carrying sleeper timber stumps throughout the region timber and fuel timber production Total heights range Victorian Railways virgin stands well-drained yellow gum