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Title: 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.

Author: Curtis, Robert O.;

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)

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.

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

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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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