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Artificial ripening of sugar pine seedsAuthor(s): Stanley L. Krugman
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
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DescriptionImmature 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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CitationKrugman, 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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