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    Author(s): William W. Oliver
    Date: 1979
    Source: Res. Pap. PSW-RP-141. Berkeley, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Forest and Range Experiment Station. 10 p
    Publication Series: Research Paper (RP)
    Station: Pacific Southwest Research Station
    PDF: View PDF  (1.7 MB)

    Description

    Growth was analyzed after one thinning in a plantation of pole-size ponderosa and Jeffrey pines on land having a site index of 50 feet at 50 years. Periodic annual increment was determined for each of three 5-year periods. On this basis, increment in diameter and cubic volume were found to he related closely to stand basal area only. Basal area and height increment, however, were also related to time since thinning: basal area growth decreased and height growth increased with each succeeding period. The optimum basal area for volume production (both cubic and board-foot measures) was estimated to be 110 ft2/acre. Optimum stocking levels and resulting stand performance are predicted for a common thinning practice.

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    Citation

    Oliver, William W. 1979. Fifteen-year growth patterns after thinning a ponderosa-Jeffrey pine plantation in northeastern California. Res. Pap. PSW-RP-141. Berkeley, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Forest and Range Experiment Station. 10 p

    Keywords

    Pinus ponderosa, Pinus jeffreyi, thinning response, diameter growth, basal area, increment, stocking level, plantations, Modoc National Forest

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