In a forthcoming issue of Tree Physiology, Paul Schaberg, a researcher working for the United States Department of Agriculture in Vermont, and his colleagues, will report the results of their experiments with sugar maples.

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"My father always expected he could be buried at his father's grave site, and it wouldn't have been an issue except for the tree roots, " he told The Associated Press.

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The groups prepared a problem tree on the top issue that they had prioritized, which was a way of identifying cause and effects.

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