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Browsing Extension Service -- Miscellaneous / Educational Materials by Author "Rupp, David Earl"

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Browsing Extension Service -- Miscellaneous / Educational Materials by Author "Rupp, David Earl"

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  • Oregon State University. Extension Service; Selker, John; Rupp, David Earl (Corvallis, Or. : Extension Service, Oregon State University, 2004-04)
    Directly below commercial mint fields, percolation in excess of 10 ppm of nitrogen as nitrate (NO3 --N), the EPA drinking water standard, occurs for much of the year (Figure 1, page 2). Concentrations rise rapidly after ...

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