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    • Journal of Range Management, Volume 42 (1989)
    • Journal of Range Management, Volume 42, Number 6 (November 1989)
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    Predicting peak standing crop on annual range using weather variables

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    Author
    George, Melvin R.
    Williams, William A.
    McDougald, Neil K.
    Clawson, W. James
    Murphy, Alfred H.
    Issue Date
    1989-11-01
    
    Metadata
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    Citation
    George, M. R., Williams, W. A., McDougald, N. K., Clawson, W. J., & Murphy, A. H. (1989). Predicting peak standing crop on annual range using weather variables. Journal of Range Management, 42(6), 508-513.
    Publisher
    Society for Range Management
    Journal
    Journal of Range Management
    URI
    http://hdl.handle.net/10150/645059
    DOI
    10.2307/3899238
    Additional Links
    https://rangelands.org/
    Abstract
    Wide yearly fluctuations in peak standing crop on California annual-type range are largely explained by temperature and precipitation patterns. The objective of this study is to improve the predictability of functions relating weather patterns and peak standing crop by including degree-days, dry periods, evaporation, season start dates, and lengths and precipitation as independent variables. Peak standing crop was regressed on these independent variables for the University of California Hopland Field Station (HFS) and San Joaquin Experimental Range (SJER). Fall and winter precipitation, winter degree-days, and longest winter dry period were related to peak standing crop at HFS (R2=0.61). Spring precipitation, growing season degree-days, winter evaporation, and winter and spring start dates were related to peak standing crop at SJER (R2=.72). The relationship of peak standing crop to accumulated precipitation on 20 November using 33 years of data (r2=0.34) was weaker than previously reported for the first 16 years (r2=0.49). This study suggests that timely prediction of peak standing crop may be possible at HFS but more difficult at SJER.
    Type
    text
    Article
    Language
    en
    ISSN
    0022-409X
    ae974a485f413a2113503eed53cd6c53
    10.2307/3899238
    Scopus Count
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    Journal of Range Management, Volume 42, Number 6 (November 1989)

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