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    Author(s): Craig D. Whitesell
    Date: 1974
    Source: Res. Note PSW-RN-295. Berkeley, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Forest and Range Experiment Station. 4 p
    Publication Series: Research Note (RN)
    Station: Pacific Southwest Research Station
    PDF: Download Publication  (271 KB)

    Description

    The optimum spacing interval at which to plant loblolly pine (Pinus taeda L.) is being studied on Maui, Hawaii. Four spacings are being tried: 6,8, 10, and 12 feet. Measurements 11 years after the plots were set up show that (a) survival rates exceeded 94 percent, (b) average d.b.h. ranged from 6.4 inches at the 6-foot spacing to 9.8 inches in the 12-foot spacing; (c) basal area ranged from 168 sq. ft. per acre in the 12-foot spacing to 278 sq. ft. per acre in the 6-foot spacing; (d) spacing did not markedly affect height growth; and (e) percent of stem in live crown ranged from 44 percent, in the 6-foot spacing, to 63 percent, in the 12-foot spacing.

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    Citation

    Whitesell, Craig D. 1974. Effects of spacing on loblolly pine in Hawaii after 11 years. Res. Note PSW-RN-295. Berkeley, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Forest and Range Experiment Station. 4 p

    Keywords

    Pinus taeda, Hawaii, species trials, spacing, seedling survival, diameter increment, basal area, height increment

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