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    The impact of the grazing animal on phosphorus, nitrogen, potassium and suspended solids loss from grazed pastures, Part A

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    Author
    Tunney, Hubert
    Kurz, Isabelle
    Bourke, David
    O'Reilly, Colin
    Jeffrey, D.W.
    Dowding, P.
    Foy, B.
    Kilpatrick, D.J.
    Haygarth, P.
    Keyword
    Phosphorus loss
    Soil hydrology
    Nutrient losses
    Chemical fertilizer use
    Overland flow
    Grassland systems
    Date
    01/06/2007
    
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    URI
    http://hdl.handle.net/11019/905
    Citation
    Tunney, H., Kurz, I., Bourke, D., The impact of the grazing animal on phosphorus, nitrogen, potassium and suspended solids loss from grazed pastures, Part A, 5022a, Teagasc, 2007.
    Abstract
    In Ireland 90% of the 4.2 million ha of farmland is grassland. Phosphorus deficiency limited grassland production in Ireland and this was corrected by chemical fertiliser use in the 1960s and 1970s. The increased inputs of fertilisers led to increased intensification of grassland with a doubling of grass yield and of grazing animal numbers, from about 3 million to over 6 million livestock units. There is little information on relative contribution of increased chemical fertiliser use compared to increased grazing animal numbers on phosphorus loss to water. The main objective of this study was to obtain information on nutrient loss, particularly phosphorus, in overland flow from cut and grazed grassland plots, with a range of soil test phosphorus levels over three years and implications.
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