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    Author(s): Annabelle E. Jaramillo
    Date: 1988
    Source: Res. Note PNW-RN-470. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 10 p
    Publication Series: Research Note (RN)
    Station: Pacific Northwest Research Station
    PDF: View PDF  (1.38 MB)

    Description

    After three growing seasons, young Douglas-fir trees in plots of various sizes that had been totally cleared of nonconifer vegetation were larger than trees in plots that had been partially cleared or not cleared at all. On the Bybee unit (Illinois Valley Ranger District, Siskiyou National Forest), height and diameter differences were highly significant between treatments. Diameter differences between the treatments were highly significant on the Squaw unit (Illinois Valley Ranger District, Siskiyou National Forest).

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    Citation

    Jaramillo, Annabelle E. 1988. Growth of Douglas-fir in Southwestern Oregon after removal of competing vegetation. Res. Note PNW-RN-470. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 10 p

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    Keywords

    Competition, Douglas-fir growth, brush removal

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