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  • Northern Tree Habitats - Geophysical Institute
    The best lodgepole pine races are faster-growing than the local spruces and larch planted in the same area; but again, only time will tell if the advantage will remain with the pine Why take a chance with exotics, when native trees have proven their ability to survive? Several reasons prompt testing of foreign tree species
  • Visit to an exotic tree plantation in Alaska
    The two-acre exotic tree plantation is part of a much-larger “boreal arboretum” on the UAF campus, which mostly consists of native spruce, birch, aspen, poplar and willow trees Having borrowed the key from a researcher with UAF’s Agricultural and Forestry Experiment Station, Woodward has invited me to join him inside the chain-link fence
  • More on Why Tree Trunks Spiral - Geophysical Institute
    Prevailing winds, in most of the tree-growing northern hemisphere, are from the west Combine these factors, and the westerly wind pushing on the thicker south side of the tree, year after year, causes an asymmetrical wind loading which slowly twists the tree around in the observed direction
  • The Smell of Christmas - Geophysical Institute
    One of many Christmas pleasures is the aroma of a freshly cut tree Both spruce and pine have it So do cranberry fields in the morning, orange peelings, and some paint thinners The substances known as essential oils are responsible for these odors
  • Mummified forest tells tale of a changing north
    The mummy trees of northern Ellesmere Island include a trunk of a pine tree four feet long and six inches in diameter Each of the trees was at least 75 years old when it died The ancient forest holds samples of the last real trees in the area before it became too cold and dry to support large plants, Barker said
  • Trees for a Cold Climate - Geophysical Institute
    Yet the pine species have raced our way, at a couple hundred meters a year, for the last 12,000 years They have adapted and evolved as they've come, so even without human- induced climate warming, they should be along shortly Perhaps they'll make it over the border in time for Alaska's bicentennial---if they hurry
  • Burls and Human Cancer - Geophysical Institute
    Photograph of a section cut from a tree with 5 burls that simultaneously grew at the same level on the tree Annual growth rings can be followed around the tree trunk at center and into each of the burls The rings show that the growth of burls began when the tree was about 40 years old
  • Evidence Piling Up for Coastal Migration Route
    They dated the pine stump to about 12,200 years ago The Canadians' discovery of the stone tool and the ancient pine tree off the Queen Charlotte Islands strengthens the notion that early settlers of the Americas may have skirted North America's ice like kayakers do today, traveling from beach to beach between glaciers
  • Burls - Geophysical Institute
    Since the hardness of the wood is related to the rate of growth, the wood inside a rapidly growing burl is softer than the wood elsewhere in the tree Nevertheless, it is hard enough to be sanded and finished into an attractive surface An affected tree may grow a single burl or many; trees with multiple burls on both trunk and limbs have been
  • Kenai bark beetles primed for another run - Geophysical Institute
    Using a "mass-attack" strategy, beetles use sheer numbers to overwhelm old-growth trees like the ones in Berg's yard Tree by tree, the Kenai Peninsula became a graveyard of whitish spruce snags, about 30 million of them But the death of the old released the young spruce, suddenly enriched with more sunshine and water





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