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  1. Identifying changes in tree form for harvested ponderosa pine in the Black Hills

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    Author(s): Michael S. Williams; Raymond L. Czaplewski; Don L. Martinez
    Date: 1996
    Source: Res. Pap. RM-RP-326. Fort Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Forest and Range Experiment Station. 8 p.
    Publication Series: Research Paper (RP)
    Station: Rocky Mountain Forest and Range Experiment Station
    DOI: https://doi.org/10.2737/RM-RP-326
    PDF: View PDF  (875.09 KB)

    Description

    Recent underestimates of total volume for timber sales in the Black Hills National Forest prompted analysis of two felled ponderosa pine (Pinus ponderosa Laws.) data sets that were collected approximately 10 years apart. Though neither data set collected was a representative sample of the Black Hills, both were similar in terms of diameter at breast height and total height. We investigated several methods for assessing differences in tree form and applied them to these two data sets. Under the assumption that these two data sets were representative of harvested trees in the Black Hills (which may be incorrect), we concluded that the average tree form of harvested ponderosa pine has changed significantly in the last 10 years. This conclusion highlights the importance of using representative data in model building.

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    Citation

    Williams, Michael S.; Czaplewski, Raymond L.; Martinez, Don L. 1996. Identifying changes in tree form for harvested ponderosa pine in the Black Hills. Res. Pap. RM-RP-326. Fort Collins, CO: U.S. Department of Agriculture, Forest Service, Rocky Mountain Forest and Range Experiment Station. 8 p.

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    Keywords

    representative data, differences in tree form, Black Hills, model building, harvested pondersoa pine

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