Pacific Northwest Research Station

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

Author: Olson, Craig M.; Martin, Robert E.

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

Station ID: RN-PNW-380

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.

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

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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