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    • Journal of Range Management, Volume 56 (2003)
    • Journal of Range Management, Volume 56, Number 3 (May 2003)
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    Economic and environmental impacts of pasture nutrient management

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    Author
    Osei, E.
    Gassman, P. W.
    Hauck, L. M.
    Neitsch, S.
    Jones, R. D.
    McNitt, J.
    Jones, H.
    Issue Date
    2003-05-01
    Keywords
    farm size
    dairy cows
    soil nutrient balance
    nutrient management
    dairy farm management
    agricultural runoff
    pollution control
    simulation models
    costs and returns
    production costs
    fertilizer application
    stocking rate
    nitrogen
    phosphorus
    application rates
    Texas
    grazing
    stocking density
    manure
    nutrient losses
    nitrogen
    phosphorus
    economics
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    Citation
    Osei, E., Gassman, P. W., Hauck, L. M., Neitsch, S., Jones, R. D., McNitt, J., & Jones, H. (2003). Economic and environmental impacts of pasture nutrient management. Journal of Range Management, 56(3), 218-226.
    Publisher
    Society for Range Management
    Journal
    Journal of Range Management
    URI
    http://hdl.handle.net/10150/643430
    DOI
    10.2307/4003810
    10.2458/azu_jrm_v56i3_osei
    Additional Links
    https://rangelands.org/
    Abstract
    Highly intensive stocking of dairy cattle on continuously grazed pasture coupled with liberal applications of commercial fertilizer can lead to increased losses of agricultural nutrients, which is a concern for water quality of receiving lakes and surface water resources. Integrated economic-environmental model simulations performed for the Lake Fork Reservoir Watershed in northeast Texas indicate that appropriate pasture nutrient management including stocking density adjustments and more efficient commercial fertilizer use could lead to significant reductions in nutrient losses. Soluble and organic P losses were predicted to decline by 54 and 13% relative to baseline conditions when manure P was assumed totally plant available (Low P scenario). The soluble and organic P loss reductions declined to 33 and 7% when only inorganic P was assumed plant available (High P scenario). Simulation of an N-based manure management plan resulted in the smallest predicted soluble and organic P loss reductions of 18 and 3%. Nitrogen loss predictions ranged from a 7% decline to a 1% increase for the 3 scenarios as compared to the baseline. The High P and Low P scenarios resulted in estimated aggregate profit reductions of 6 and 18% relative to the baseline. These profit declines occurred because the dairies had to acquire additional pasture land to accommodate the expanded area required for the P-based scenarios. In contrast, the N-based stocking density and nutrient management scenario resulted in an aggregate profit increase of 3% across all dairies. Variations in economic impacts were also predicted across farm sizes.
    Type
    text
    Article
    Language
    en
    ISSN
    0022-409X
    ae974a485f413a2113503eed53cd6c53
    10.2307/4003810
    Scopus Count
    Collections
    Journal of Range Management, Volume 56, Number 3 (May 2003)

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