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    Author(s): M. Thompson Conkle
    Date: 1972
    Source: Res. Note PSW-RN-275. Berkeley, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest and Range Experiment Station. 4 p
    Publication Series: Research Note (RN)
    Station: Pacific Southwest Research Station
    PDF: View PDF  (552 KB)

    Description

    Foresters in California were surveyed in 1970 to determine the extent of artificial regeneration and tree improvement efforts in the State. Seeding of Douglas-fir was the prevailing practice in the North Coast. Inland areas were being planted with conifers, including ponderosa, Jeffrey, Monterey, and sugar pines, Douglas-fir, and red and white firs. Manpower devoted to tree improvement programs amounted to 8.7 man-years. It was being used chiefly to select superior trees and to establish seed orchards of Douglas-fir and ponderosa and sugar pines. These tree improvement efforts fall far short of that required to study and improve California's timber resources.

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    Citation

    Conkle, M. Thompson 1972. Forest tree improvement in California-1970. Res. Note PSW-RN-275. Berkeley, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest and Range Experiment Station. 4 p

    Keywords

    tree improvement, Pinus ponderosa, Pseudotsuga menziesii, Abies spp., California, artificial regeneration, superior trees, seed orchards

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