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Nitrogen Fluxes through Unsaturated Zones in Five Agricultural Settings across the United States

Nitrogen Fluxes through Unsaturated Zones in Five Agricultural Settings across the United States,10.2134/jeq2007.0010,Journal of Environmental Quality

Nitrogen Fluxes through Unsaturated Zones in Five Agricultural Settings across the United States   (Citations: 14)
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Journal: Journal of Environmental Quality - J ENVIRON QUAL , vol. 37, no. 3, 2008
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    • ...Numerous studies have used groundwater-age distributions to estimate recharge in aquifers at the local scale (for example, Vogel 1967 ;S chlosser et al.1989; Verhagen 1992; Solomon et al. 1995; Böhlke and Denver 1995; Cook et al. 1995;LeGal Le Salle et al. 2001; Puckett et al. 2002; Plummer et al. 2004; Böhlke et al. 2002, 2007a, b; Green et al. 2008a; McMahon et al. 2004a, 2007)...
    • ...Relatively few studies have compiled groundwater-age data for the purpose of comparing age-based estimates of recharge between aquifers (for example, Böhlke 2002 ;C oes et al.2007; Green et al. 2008a)...
    • ...Nonlinear least squares regression was used to fit the computed groundwater-age profile from Eq. (1) to the data (Green et al. 2008a)...
    • ...28 Green et al. 2008a, b 4 Glacial Deposits (eastern glaciated region) 1S F...
    • ..., CFC 270 24 22 Green et al. 2008a, b 22 Northern Atlantic Coastal Plain 3 3 H/ 3 He 400 35 31 Szabo et al. 1996; Stackelberg et al. 2000; Kauffman et al. 2001 23 Pacific Northwest basin fill 2 SF...
    • ...190 Green et al. 2008a, b 24 Pacific Northwest basin fill 6 CFC 54 18 210 Hinkle et al. 2007 25 Puget-Willamette Lowland 1...
    • ... et al. 2000; Dugan and Zelt 2000; Steenhuis et al. 1985), Stream base-flow separation (Charles et al. 2001; Lacombe and Rosman 1995; Cushing et al. 1973; Coes et al. 2007), Local groundwater-flow model (Gannett et al. 2001; McMahon et al. 2004a; Morgan et al. 2007; Mullaney and Grady 1997; Reilly et al. 1994; Snyder et al. 1994; Szabo et al. 1996), Water-table fluctuation (Cox and Kahle 1999; Delin et al. 2000; Fisher and Healy 2008; Green et ...
    • ...Böhlke and Denver 1995) 21) Morgan Creek, Maryland (Green et al. 2008a,b) 22) Glassboro, New Jersey (Szabo et al. 1996) 29) Cow Castle Creek, South...
    • ...Geol Surv 2009; Thomas 2000) 9) Ottertail, Minnesota (Puckett et al. 2002) 10) MSEA, Minnesota (Delin et al. 2000; Böhlke et al. 2002) 11) MSEA, Minnesota (Delin et al. 2000; Böhlke et al. 2002) 12) Maple Creek, Nebraska (Green et al. 2008a,b) 13) York, Nebraska (Landon et al. 2008) 15) Dutch Flats, Nebraska (Böhlke et al. 2007a) 23) Yakima, Washington (Green et al., 2008a,b) 24) La Pine, Oregon (Hinkle et al. 2007) 25) ...
    • ...Geol Surv 2009; Thomas 2000) 9) Ottertail, Minnesota (Puckett et al. 2002) 10) MSEA, Minnesota (Delin et al. 2000; Böhlke et al. 2002) 11) MSEA, Minnesota (Delin et al. 2000; Böhlke et al. 2002) 12) Maple Creek, Nebraska (Green et al. 2008a,b) 13) York, Nebraska (Landon et al. 2008) 15) Dutch Flats, Nebraska (Böhlke et al. 2007a) 23) Yakima, Washington (Green et al., 2008a,b) 24) La Pine, Oregon (Hinkle et al. 2007) 25) ...

    P. B. McMahonet al. A comparison of recharge rates in aquifers of the United States based ...

    • ...Böhlke and Denver 1995; Böhlke 2002; Koh et al. 2007; Green et al. 2008b)...

    Kyle B. Brownet al. Impacts of agricultural irrigation recharge on groundwater quality in ...

    • ...unsaturated zone water and shallow groundwater [Domagalski et al., 2008; Green et al., 2008a, 2008b], resulting in elevated concentrations of NO3 ‐N in the surfi-...
    • ...Additional aspects of the hydrogeology and geochemistry of the site are given elsewhere [Phillips et al., 2007; Domagalski et al., 2008; Green et al., 2008a, 2008b]...
    • ...The increased use of chemical fertilizers tends to cause a decrease in d 15 N[NO3 ]0, which is seen in the mean modeled input values in Figure 4b. Elevated values of d 15 N[NO3 ]0 at early times are consistent with manure sources of N, which were common during the early agricultural history of the area [Green et al., 2008b], and might also indicate components of natural NO3 [e.g., McMahon and Böhlke, 2006]...
    • ...county‐wide application rates of manure N and fertilizer N [Green et al., 2008b]...

    Christopher T. Greenet al. Mixing effects on apparent reaction rates and isotope fractionation du...

    • ...Symbols are from estimates of average recharge from this and other studies: open square Green et al. (2008a); dot Phillips et al. 2007; star Fisher and Healy (2008); triangle this study 681...
    • ...Symbols are from estimates of average recharge from this and other studies: open square Green et al. (2008a); dot Phillips et al. 2007; star Fisher and Healy (2008); triangle this study 681...

    Joseph L. Domagalskiet al. Influences of the unsaturated, saturated, and riparian zones on the tr...

    • ...The recharge estimates of 6.2–10.9 cm/year are lower than similar sites located in California, Maryland, Nebraska, and Washington (Green et al. 2008a)...

    Heather L. Welchet al. The fate and transport of nitrate in shallow groundwater in northweste...

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