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    Author(s): Craig M. Olson; Robert E. Martin
    Date: 1981
    Source: Res. Note PNW-RN-380. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station. 6 p
    Publication Series: Research Note (RN)
    Station: Pacific Northwest Research Station
    PDF: View PDF  (72 KB)

    Description

    Understory plants in closed 70-year-old even-aged Douglas-fir stands in north central Washington were destructively sampled to determine the relationship of ground cover and height to dry weight. Weight of plant material can be estimated from the product of plant height and percentage of ground cover on 50- x 100-centimeter (cm) quadrats. Correlation coefficients for equations developed range from .70 to .96. The equations are best suited for calculating loadings in similar stands.

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    Citation

    Olson, Craig M.; Martin, Robert E. 1981. Estimating biomass of shrubs and forbs in central Washington Douglas-fir stands. Res. Note PNW-RN-380. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station. 6 p

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    Keywords

    Biomass, fuel loads, sampling methods, understory layer, woody plants, forbs, Douglas-fir, Pseudotsuga menziesii

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