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    Author(s): Stanley L. Krugman
    Date: 1966
    Source: Res. Paper PSW-RP-32. Berkeley, CA: Pacific Southwest Forest & Range Experiment Station, Forest Service, U. S. Department of Agriculture; 7 p
    Publication Series: Research Paper (RP)
    Station: Pacific Southwest Research Station
    PDF: View PDF  (213 KB)

    Description

    Immature sugar pine seeds were collected and ripened either in the cone or in moist vermiculate. Seeds collected before the second week of August could not be artificially ripened and the causes for these failures were investigated. After the second week of August, immature seeds could be brought to maturity. A practical method for a commercial operation should be possible.

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    Citation

    Krugman, Stanley L. 1966. Artificial ripening of sugar pine seeds. Res. Paper PSW-RP-32. Berkeley, CA: Pacific Southwest Forest & Range Experiment Station, Forest Service, U. S. Department of Agriculture; 7 p

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