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    Author(s): Boyd E. Wickman
    Date: 1985
    Source: Res. Note PNW-RN-427. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Research Station: 7 p
    Publication Series: Research Note (RN)
    Station: Pacific Northwest Research Station
    PDF: View PDF  (280 KB)

    Description

    A field test showed that degree-days accumulated by a miniature computer and a recording thermograph in early spring and summer were comparable. For phenological studies the biophenometer was as accurate and more efficient than the hygrothermograph.

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    Citation

    Wickman, Boyd E. 1985. Comparison of a degree-day computer and a recording thermograph in a forest environment. Res. Note PNW-RN-427. Portland, OR: U.S. Department of Agriculture, Forest Service, Pacific Northwest Forest and Range Experiment Station: 7 p

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    Keywords

    degree days, phenology, temperature (-plants, field equipment, insect control

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https://www.fs.usda.gov/treesearch/pubs/26838