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    • Journal of Range Management, Volume 39 (1986)
    • Journal of Range Management, Volume 39, Number 3 (May 1986)
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    Exposition on the Selection of Appropriate Experimental Design and Statistical Analysis for Pasture Improvement Research

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    Author
    Stroup, W. W.
    Waller, S. S.
    Gates, R. N.
    Issue Date
    1986-05-01
    Keywords
    research
    land improvements
    grassland improvement
    experimental design
    grazing experiments
    statistical analysis
    pastures
    range management
    botanical composition
    rangelands
    
    Metadata
    Show full item record
    Citation
    Stroup, W. W., Waller, S. S., & Gates, R. N. (1986). Exposition on the selection of appropriate experimental design and statistical analysis for pasture improvement research. Journal of Range Management, 39(3), 200-207.
    Publisher
    Society for Range Management
    Journal
    Journal of Range Management
    URI
    http://hdl.handle.net/10150/645331
    DOI
    10.2307/3899049
    Additional Links
    https://rangelands.org/
    Abstract
    Selection of appropriate treatment and experiment designs are essential elements in research. However, the expense and variability associated with pasture renovation studies creates unique problems in the application of standard statistical techniques. Pasture-size renovation studies are restricted by expense, requiring the use of grazing exclosures (subsamples). Treatment design must include an adequate control for treatment comparison. Controls for pasture renovation practices cannot be limited to untreated areas within a grazing exclosure. The true measure response is found in the difference between treated areas and a typical grazed pasture situation. Criteria for exclosure selection (homogeneity) and heterogeneity of the grazed pasture may result in unequal variances or nonnormal error distributions, thus restricting the use of an analysis of variance. The experiment design must recognize the requirements for making reliable inferences. Pasture-to-pasture variability generally demands that pastures should be replicated in renovation studies to allow general inferences. Within pasture variability would support the need for multiple exclosures within each pasture. Costs associated with this kind of research limit the utility of idealized experimental designs. Several alternative experimental designs are discussed. Limitations in interpretation and risks of drawing erroneous or weak conclusions are reviewed.
    Type
    text
    Article
    Language
    en
    ISSN
    0022-409X
    ae974a485f413a2113503eed53cd6c53
    10.2307/3899049
    Scopus Count
    Collections
    Journal of Range Management, Volume 39, Number 3 (May 1986)

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