Growth of Douglas-fir in Southwestern Oregon after removal of competing vegetation.

Annabelle E. Jaramillo

doi:10.2737/PNW-RN-470

Treesearch

Growth of Douglas-fir in Southwestern Oregon after removal of competing vegetation.

Informally Refereed

Authors:

Annabelle E. Jaramillo

Year:

1988

Type:

Research Note

Station:

Pacific Northwest Research Station

DOI:

https://doi.org/10.2737/PNW-RN-470

Source:

Res. Note PNW-RN-470. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station. 10 p

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Abstract

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).

Keywords

Competition, Douglas-fir growth, brush removal

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