Jahrringe, ein Thema der praktischen forstlichen Forschung.
1996
Schweingruber F.H.
No other organism but the tree provides a chronologically accurate record of the past in the form of growth rings. Archeologists use growth rings to precisely date buildings erected in the past 6000 years and physicists determine the isotope content of cellulose in the rings to reconstruct the intensity of the earth's magnetic field and the solar wind. The practical forester can use tree rings to find the answers to many of the questions with which he is confronted every day. The effects of snow, fungi, insects, and rodents, of fire and wind, forest operations, and the climate are often manifested in stem discs as long-lasting or abrupt annual growth changes in the form of zones of reaction wood or wounds.
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