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  1. Levels-of-growing-stock cooperative study in Douglas-fir: report no. 09—Some comparisons of DFSIM estimates with growth in the levels-of-growing-stock study.

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    Author(s): Robert O. Curtis
    Date: 1987
    Source: Res. Pap. PNW-RP-376. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station. 44 p
    Publication Series: Research Paper (RP)
    Station: Pacific Northwest Research Station
    DOI: https://doi.org/10.2737/PNW-RP-376
    PDF: View PDF  (2.08 MB)

    Description

    Initial stand statistics for the levels-of-growing-stock study installations were projected by the Douglas-fir stand simulation program (DFSIM) over the available periods of observation. Estimates were compared with observed volume and basal area growth, diameter change, and mortality. Overall agreement was reasonably good, although results indicate some biases and a need for revision of the upper density limit in the DFSIM program.

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    Citation

    Curtis, Robert O. 1987. Levels-of-growing-stock cooperative study in Douglas-fir: report no. 09—Some comparisons of DFSIM estimates with growth in the levels-of-growing-stock study. Res. Pap. PNW-RP-376. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station. 44 p

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    Keywords

    simulation, projections (stand), model validation, statistics (stand), growing stock (increment/yield, Douglas-fir, Pseudotsuga menziesii)

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