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    Author(s): Jay R. Bentley; Donald W. Seegrist; David A. Blakeman
    Date: 1970
    Source: Res. Note PSW-RN-215. Berkeley, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Forest and Range Experiment Station. 12 p
    Publication Series: Research Note (RN)
    Station: Pacific Southwest Research Station
    PDF: Download Publication  (1.57 MB)

    Description

    The effects of herbicides or other cultural treatments of low shrubs can be sampled by a new technique using crown volume as the key variable. Low shrubs were grouped in 12 crown volume classes with index values based on height times surface area of crown. The number of plants, by species, in each class is counted on quadrats. Many quadrats are needed for highly precise measurements. Shrub dry-weight was highly correlated with crown volume for each of the four species studied, but ratios of weight to volume were variable.

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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.

    Citation

    Bentley, Jay R.; Seegrist, Donald W.; Blakeman, David A. 1970. A technique for sampling low shrub vegetation, by crown volume classes. Res. Note PSW-RN-215. Berkeley, CA: U.S. Department of Agriculture, Forest Service, Pacific Southwest Forest and Range Experiment Station. 12 p

    Keywords

    herbicide effects, sampling techniques, crown volume measurement, shrub cover

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