Levels-of-growing-stock cooperative study in Douglas-fir: report no. 09&#151;Some comparisons of DFSIM estimates with growth in the levels-of-growing-stock study.

Robert O. Curtis

doi:10.2737/PNW-RP-376

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

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

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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)

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

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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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Cited

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