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    • Journal of Range Management, Volume 45 (1992)
    • Journal of Range Management, Volume 45, Number 5 (September 1992)
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    Effects of cattle grazing on blue oak seedling damage and survival

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    Author
    Hall, L. M.
    George, M. R.
    McCreary, D. D.
    Adams, T. E.
    Issue Date
    1992-09-01
    Keywords
    crop damage
    recruitment
    Quercus douglasii
    seedlings
    stocking rate
    winter
    spring
    summer
    grazing intensity
    browsing damage
    California
    woodlands
    cattle
    range management
    seasonal variation
    grazing
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    Citation
    Hall, L. M., George, M. R., McCreary, D. D., & Adams, T. E. (1992). Effects of cattle grazing on blue oak seedling damage and survival. Journal of Range Management, 45(5), 503-506.
    Publisher
    Society for Range Management
    Journal
    Journal of Range Management
    URI
    http://hdl.handle.net/10150/644543
    DOI
    10.2307/4002912
    Additional Links
    https://rangelands.org/
    Abstract
    Cattle grazing has been suggested as a principal cause for poor oak recruitment in California's hardwood rangelands. This study evaluated the effects of stock density and season of grazing on blue oak (Quercus douglasii H. & A.) establishment. In December 1989, seven hundred and twenty blue oak seedlings were planted on 3-m centers in 30 plots in 3 annual grassland pastures at the Sierra Foothill Research and Extension Center east of Marysville, Calif. The treatments consisted of 3 seasons X 3 stock densities plus 1 nongrazed control. During January, April, and July of 1990, steers and heifers (mean = 318 kg) were allowed to graze 1 plot per week at low, medium, and high stock densities (2.5, 7.5, and 15.0 head/ha, respectively). Control plots were used to monitor wildlife browsing. One half of all seedling sites received an application of glyphosate prior to transplanting to eliminate grass competition. Browsing and trampling damage were estimated at the end of each treatment. Total damage (sum of browsing and trampling damage), browsing damage, trampling damage, and survival to April 1991 were significantly different for the 9 season and stock density treatments (P < 0.05). Spring and summer grazing tended to be most damaging and resulted in the lowest survival rates. Within each season total damage increased with stock density but survival did not change significantly. Weed control around oak seedlings had no apparent effect on total damage or survival. There were significant differences in browsing damage between seasons but not between control and grazed plots within seasons (P < 0.05). Survival in ungrazed plots was not significantly different (P < 0.05) from the spring and summer grazed plots. Consequently, the contribution of wildlife to reduced blue oak seedling survival in grazed oak woodlands should not be underestimated.
    Type
    text
    Article
    Language
    en
    ISSN
    0022-409X
    ae974a485f413a2113503eed53cd6c53
    10.2307/4002912
    Scopus Count
    Collections
    Journal of Range Management, Volume 45, Number 5 (September 1992)

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