Estimating biomass of shrubs and forbs in central Washington Douglas-fir stands.

Craig M. Olson; Robert E. Martin

doi:10.2737/PNW-RN-380

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Estimating biomass of shrubs and forbs in central Washington Douglas-fir stands.

Informally Refereed

Authors:

Craig M. Olson, Robert E. Martin

Year:

1981

Type:

Research Note

Station:

Pacific Northwest Research Station

DOI:

https://doi.org/10.2737/PNW-RN-380

Source:

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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Abstract

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.

Keywords

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

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