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    • Journal of Range Management, Volume 44 (1991)
    • Journal of Range Management, Volume 44, Number 1 (January 1991)
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    Biomass productivity and range condition on range sites in southern Arizona

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    Author
    Frost, W. E.
    Smith, E. L.
    Issue Date
    1991-01-01
    Keywords
    seral stages
    site factors
    productivity
    pastures
    biomass production
    plant communities
    botanical composition
    rangelands
    Arizona
    forage
    
    Metadata
    Show full item record
    Citation
    Frost, W. E., & Smith, E. L. (1991). Biomass productivity and range condition on range sites in southern Arizona. Journal of Range Management, 44(1), 64-66.
    Publisher
    Society for Range Management
    Journal
    Journal of Range Management
    URI
    http://hdl.handle.net/10150/644825
    DOI
    10.2307/4002641
    Additional Links
    https://rangelands.org/
    Abstract
    Range condition is usually defined by similarity of current to climax or potential vegetation. It is often assumed that rangelands in low condition are biologically less productive than those in higher condition. The objective of this study was to determine if range condition (ecological status) is related to total productivity or to forage production for livestock. Adjacent areas along fencelines representing differences in range condition were sampled in 58 locations. These comparisons represented 31 different range sites across southern Arizona. Weight by species of above-ground peak standing crop current year’s growth of vegetation was estimated using the dry-weight-rank/comparative yield methods. Range condition was rated with Soil Conservation Service range site descriptions. Species were classified as forage or non-forage to estimate forage available for cattle. In 75-85% of comparisons of good condition sites to fair condition, good to poor, and fair to poor, total current year’s standing crop did not differ significantly. Where differences were significant, productivity was not consistently more on the high condition class. Forage production, however, was more from the stand in the higher condition class in about 213 of the comparisons. We concluded that in southern Arizona rangelands in higher condition (higher seral) classes usually produce more forage for cattle than lower condition classes on the same range site. Nevertheless, it is not usually true that total biomass productivity on low condition range is less than the same range site in higher condition.
    Type
    text
    Article
    Language
    en
    ISSN
    0022-409X
    ae974a485f413a2113503eed53cd6c53
    10.2307/4002641
    Scopus Count
    Collections
    Journal of Range Management, Volume 44, Number 1 (January 1991)

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