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    Author(s): Charles E. Hale
    Date: 1951
    Source: PNW Old Series Research Notes No. 74, p. 1-8
    Publication Series: Scientific Journal (JRNL)
    Station: Pacific Northwest Research Station
    PDF: Download Publication  (600 KB)


    Frost observations during the winter and spring of 1949-1950 indicated that pronounced soil freezing conditions existed in the ponderosa pine, lodgepole pine, grass and brush types in eastern Oregon and Washington. Accordingly, a study was designed to determine the occurrence and character of frost under these widespread forest and range types. This paper presents a progress report of observations on soil freezing conditions in these cover types in eastern Oregon during the winter and spring of 1950-1951.

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    • This article was written and prepared by U.S. Government employees on official time, and is therefore in the public domain.


    Hale, Charles E. 1951. Further observations on soil freezing in the Pacific Northwest. PNW Old Series Research Notes No. 74, p. 1-8

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