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Does the Oscilloscope Technique Reveal the Dormancy Status of Douglas-fir and Ponderosa Pine?

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The oscilloscope technique was systematically compared to a standard method of determining dormancy depth on test populations of Douglas-fir [Pseudotsuga menziesii (Mirb.) Franco] and ponderosa pine (Pinus ponderosa Laws.) under two watering regimes. We examined the properties of the electrical circuit formed by the oscilloscope technique to provide an analytical framework for interpreting waveforms and to permit an objective choice of waveform characteristics useful for the comparison. Waveform distortion inherent to the technique would otherwise confound the results. Correlation between the standard method and the chosen waveform characteristic was not found in late summer and fall, although winter correlation was good. This indicates that, at least in its present form, the oscilloscope technique is not suitable for determining the physiological fitness of these species for lifting. Forest Sci. 27:405-412.

Keywords: Pinus ponderosa; Pseudotsuga menziesii; bioelectric; conifer seedling; nursery management; regeneration

Document Type: Journal Article

Affiliations: Professor of Forest Ecology, Department of Forest Science, School of Forestry, Oregon State University, Corvallis, Oregon 97331

Publication date: 1981-06-01

More about this publication?
  • Forest Science is a peer-reviewed journal publishing fundamental and applied research that explores all aspects of natural and social sciences as they apply to the function and management of the forested ecosystems of the world. Topics include silviculture, forest management, biometrics, economics, entomology & pathology, fire & fuels management, forest ecology, genetics & tree improvement, geospatial technologies, harvesting & utilization, landscape ecology, operations research, forest policy, physiology, recreation, social sciences, soils & hydrology, and wildlife management.
    Forest Science is published bimonthly in February, April, June, August, October, and December.

    2015 Impact Factor: 1.702
    Ranking: 16 of 66 in forestry

    Average time from submission to first decision: 62.5 days*
    June 1, 2016 to Feb. 28, 2017

    Also published by SAF:
    Journal of Forestry
    Other SAF Publications
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