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      Mitigation of phosphorus, sediment and Escherichia coli losses in runoff from a dairy farm roadway

      1 , 2 , 3 , , 3

      Irish Journal of Agricultural and Food Research

      Compuscript

      Contaminants, dung, laneway

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          Abstract

          Dairy cow deposits on farm roadways are a potential source of contaminants entering streams. Phosphorus (P), suspended sediment (SS) and Escherichia coli (E. coli) loads in 18 runoff events over 12 mo from two-halves of a section of dairy farm roadway that spilt into an adjacent P-impacted stream were measured. The runoff from one half was untreated while the other half was directed through a filter of steel melter slag [termed aluminium chlorohydrate (ACH)-altered slag] sprayed with 1% ACH solution to improve P sorption capacity. An uncertainty analysis was conducted to ascertain potential loads of P lost from roadways considering variation in deposit weight, number and P content. Over the monitoring period, the total load decreased P (92%), SS (98%) and E. coli (76%) from the ACH-altered slag roadway compared to the control. However, uncertainty analysis showed that the amount of dung-P deposited on the roadway could be 10-fold greater.

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          Most cited references 27

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          Nitrogen and Phosphorus Limitation of Phytoplankton Growth in New Zealand Lakes: Implications for Eutrophication Control

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            Water quality impact of a dairy cow herd crossing a stream

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              Relationships between land use and nitrogen and phosphorus in New Zealand lakes

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                Author and article information

                Journal
                ijafr
                ijafr
                Irish Journal of Agricultural and Food Research
                IJAFR
                Compuscript (Ireland )
                0791-6833
                30 November 2020
                Affiliations
                1AgResearch, Lincoln Science Centre, Private Bag 4749, Christchurch 8140, New Zealand
                2Faculty of Agriculture and Life Sciences, P O Box 84, Lincoln University, Lincoln 7647, Christchurch, New Zealand
                3Teagasc, Environment Research Centre, Co. Wexford, Ireland
                Author notes
                †Corresponding author: O. Fenton, E-mail: owen.fenton@ 123456teagasc.ie
                Article
                10.15212/ijafr-2020-0117
                Copyright © 2020 McDowell, Daly, and Fenton

                This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivs license CC BY-NC-ND 3.0 IE.

                Page count
                Figures: 3, Tables: 2, References: 27, Pages: 5
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