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A scientist extracts a core from a charred ponderosa pine

By Western Ecological Research Center (WERC)
Man kneels near the base of a charred ponderosa pine, using an increment borer to extract a core
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Detailed Description

USGS scientist Zach Wenderott extracts a tree core from a charred ponderosa pine in Lassen National Park as part of a study of how prescribed fire influences tree growth.

Sources/Usage

Public Domain.