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    Author(s): Benjamin Spada
    Date: 1960
    Source: PNW Old Series Research Notes No. 181, p. 1-4
    Publication Series: Scientific Journal (JRNL)
    Station: Pacific Northwest Research Station
    PDF: View PDF  (160 KB)


    In certain kinds of forest growth studies, an estimate of diameter outside bark is required for trees as of some previous date. Previously, papers were published by this Station regarding estimation of past diameters of Douglas-fir and ponderosa pine. Since they were issued, new and more complete data have been collected for most of the major species in the ponderosa pine subregion as part of the Forest Survey inventory program.

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    Spada, Benjamin. 1960. Estimating past diameters of several species in the ponderosa pine subregion of Oregon and Washington. PNW Old Series Research Notes No. 181, p. 1-4

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