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    • Journal of Range Management, Volume 48 (1995)
    • Journal of Range Management, Volume 48, Number 3 (May 1995)
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    Chromic oxide contamination of pasture previously used in marker studies

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    Author
    Sprinkle, J. E.
    Kress, D. D.
    Doornbos, D. E.
    Anderson, D. C.
    Tess, M. W.
    Ansotegui, R. P.
    Olson, B. E.
    Roth, N. J.
    Issue Date
    1995-05-01
    Keywords
    chromic oxide
    controlled release
    contamination
    experimental bias
    errors
    feces composition
    pastures
    beef cows
    grazing
    forage
    
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    Citation
    Sprinkle, J. E., Kress, D. D., Doornbos, D. E., Anderson, D. C., Tess, M. W., Ansotegui, R. P., ... & Roth, N. J. (1995). Chromic oxide contamination of pasture previously used in marker studies. Journal of Range Management, 48(3), 194-197.
    Publisher
    Society for Range Management
    Journal
    Journal of Range Management
    URI
    http://hdl.handle.net/10150/644370
    DOI
    10.2307/4002419
    Additional Links
    https://rangelands.org/
    Abstract
    Fecal output of range cows was determined during 2 periods of summer (period I) and late summer (period II) grazing using a constant release intraruminal Cr2O3 bolus. Chromic oxide contamination was determined by analyzing forage for Cr2O3 and by obtaining fecal samples from cows prior to bolusing. Control cows were also monitored along with the experimental cows during grazing periods. The overall herd least squares mean for fecal output during period I was lower than the expected value by 48%. Forage during period I contained an average of 55.7 microgram Cr2O3 g-1 of forage or about 45% of the daily dose of the bolus. Forage during period II contained an average of 38.3 microgram Cr2O3 g-1 of forage or about 29% of the daily dose of the bolus. Our results indicate that comparisons of fecal output least squares means by period of the year can be biased by Cr2O3 contamination of forage in pastures which have been previously used for marker studies.
    Type
    text
    Article
    Language
    en
    ISSN
    0022-409X
    ae974a485f413a2113503eed53cd6c53
    10.2307/4002419
    Scopus Count
    Collections
    Journal of Range Management, Volume 48, Number 3 (May 1995)

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