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Forest regeneration --- Regeneration (Biology) --- Regeneration (Botany) --- Oregon
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Forest thinning --- Growth --- Larches --- Trees --- Oregon
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Conifers --- Growth --- Seedlings --- Oregon --- Washington (State)
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Igneous rocks --- Ophiolites --- Pyroxenite --- Sulfides. --- Oregon.
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Geothermal engineering --- Volcanoes --- Terrestrial heat flow --- Groundwater flow --- Newberry Volcano (Or.) --- Oregon. --- Oregon
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biodegradation --- Conifers --- Forest litter --- Prescribed burning --- Oregon --- Washington (State)
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Forecasting --- Forests and forestry --- Internet resource --- Reforestation --- Oregon
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Douglas fir --- Growth --- Statistics --- Trees --- Canada --- Oregon --- Washington (State)
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Geology --- Prospecting --- Mines and mineral resources --- California, Northern. --- Oregon
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