-
1
-
-
0003962239
-
County-level estimates of nitrogen and phosphorus fertilizer use in the United States
-
1945 to 1985, 90-130, 15 p. U.S. Geological Survey, Washington, DC
-
Alexander, R.B., and R.A. Smith. 1990. County-level estimates of nitrogen and phosphorus fertilizer use in the United States, 1945 to 1985. Open-File Report 90-130, 15 p. U.S. Geological Survey, Washington, DC.
-
(1990)
Open-File Report
-
-
Alexander, R.B.1
Smith, R.A.2
-
2
-
-
0005592832
-
Pesticides in ground water: Distribution, trends, and governing factors
-
588 p. Ann Arbor Press, Chelsea, MI
-
Barbash, J.E., and E.A. Resek. 1996. Pesticides in ground water: Distribution, trends, and governing factors: Pesticides in the hydrologic system series, v. 2, 588 p. Ann Arbor Press, Chelsea, MI.
-
(1996)
Pesticides in the hydrologic system series
, vol.2
-
-
Barbash, J.E.1
Resek, E.A.2
-
3
-
-
0003734608
-
Distribution of major herbicides in ground water of the United States
-
98-4245, 58 p. U.S. Geological Survey, Washington, DC
-
Barbash, J.E., G.P. Thelin, D.W. Kolpin, and R.J. Gilliom. 1999. Distribution of major herbicides in ground water of the United States. Water-Resources Investigations Report 98-4245, 58 p. U.S. Geological Survey, Washington, DC.
-
(1999)
Water-Resources Investigations Report
-
-
Barbash, J.E.1
Thelin, G.P.2
Kolpin, D.W.3
Gilliom, R.J.4
-
4
-
-
0003590040
-
Spatial data in geographic information system format on agricultural chemical use, land use, and cropping practices in the United States
-
94-4176, 91 p. U.S. Geological Survey, Washington, DC
-
Battaglin, W.A., and D.A. Goolsby. 1995. Spatial data in geographic information system format on agricultural chemical use, land use, and cropping practices in the United States. Water-Resources Investigations Report 94-4176, 91 p. U.S. Geological Survey, Washington, DC.
-
(1995)
Water-Resources Investigations Report
-
-
Battaglin, W.A.1
Goolsby, D.A.2
-
5
-
-
51849094961
-
A comparison of pesticide detection frequency and concentration in ground water of the United States between 1993 and 2003
-
Bexfield, L. 2008. A comparison of pesticide detection frequency and concentration in ground water of the United States between 1993 and 2003. J. Environ. Qual. 37:S-226-S-239.
-
(2008)
J. Environ. Qual
, vol.37
-
-
Bexfield, L.1
-
6
-
-
51849163709
-
-
Nebraska. Water-Supply Paper 1378, 438 p. U.S. Geological Survey, Washington, DC
-
Bjorklund, L.J., and R.F. Brown. 1957. Geology and ground-water resources of the lower South Platte River valley between Hardin, Colorado and Paxton, Nebraska. Water-Supply Paper 1378, 438 p. U.S. Geological Survey, Washington, DC.
-
(1957)
Geology and ground-water resources of the lower South Platte River valley between Hardin, Colorado and Paxton
-
-
Bjorklund, L.J.1
Brown, R.F.2
-
7
-
-
33845872551
-
Effects of surface-water irrigation on sources, fluxes, and residence times of water, nitrate, and uranium in an alluvial aquifer
-
Böhlke, J.K., I.M. Verstraeten, and T.F. Kraemer. 2007. Effects of surface-water irrigation on sources, fluxes, and residence times of water, nitrate, and uranium in an alluvial aquifer. Appl. Geochem. 22:152-174.
-
(2007)
Appl. Geochem
, vol.22
, pp. 152-174
-
-
Böhlke, J.K.1
Verstraeten, I.M.2
Kraemer, T.F.3
-
8
-
-
0003627112
-
Methods of analysis by the U.S. Geological Survey National Water Quality Laboratory-Determination of dissolved organic carbon by UV-promoted persulfate oxidation and infrared spectrometry
-
92-480, 16 p. U.S. Geological Survey, Washington, DC
-
Brenton, R.W., and T.L. Arnett. 1993. Methods of analysis by the U.S. Geological Survey National Water Quality Laboratory-Determination of dissolved organic carbon by UV-promoted persulfate oxidation and infrared spectrometry. Open-File Report 92-480, 16 p. U.S. Geological Survey, Washington, DC.
-
(1993)
Open-File Report
-
-
Brenton, R.W.1
Arnett, T.L.2
-
9
-
-
51849083425
-
Shallow ground-water quality of selected land-use/aquifer settings in the South Platte River Basin, Colorado and Nebraska, 1993-95
-
97-4229, 53 p. U.S. Geological Survey, Washington, DC
-
Bruce, B.W., and P.B. McMahon. 1998. Shallow ground-water quality of selected land-use/aquifer settings in the South Platte River Basin, Colorado and Nebraska, 1993-95. Water-Resources Investigations Report 97-4229, 53 p. U.S. Geological Survey, Washington, DC.
-
(1998)
Water-Resources Investigations Report
-
-
Bruce, B.W.1
McMahon, P.B.2
-
10
-
-
0027038630
-
2) as hydrologic tracers and age-dating tools - The alluvium and terrace system of Central Oklahoma
-
2) as hydrologic tracers and age-dating tools - The alluvium and terrace system of Central Oklahoma. Water Resour. Res. 28(9):2257-2283.
-
(1992)
Water Resour. Res
, vol.28
, Issue.9
, pp. 2257-2283
-
-
Busenberg, E.1
Plummer, L.N.2
-
11
-
-
23744517236
-
Vulnerability assessments of Colorado ground water to nitrate contamination
-
Caplacha, Z.L., R.M. Waskom, T.A. Bauder, J.R. Sharkoff, and R. Khosla. 2004. Vulnerability assessments of Colorado ground water to nitrate contamination. Water Air Soil Pollut. 159:373-394.
-
(2004)
Water Air Soil Pollut
, vol.159
, pp. 373-394
-
-
Caplacha, Z.L.1
Waskom, R.M.2
Bauder, T.A.3
Sharkoff, J.R.4
Khosla, R.5
-
12
-
-
0036787547
-
Measurement of the oxygen isotopic composition of nitrate in seawater and freshwater using the denitrifier method
-
Casciotti, K.L., D.M. Sigman, M.G. Hastings, J.K. Böhlke, and A. Hilkert. 2002. Measurement of the oxygen isotopic composition of nitrate in seawater and freshwater using the denitrifier method. Anal. Chem. 74:4905-4912.
-
(2002)
Anal. Chem
, vol.74
, pp. 4905-4912
-
-
Casciotti, K.L.1
Sigman, D.M.2
Hastings, M.G.3
Böhlke, J.K.4
Hilkert, A.5
-
14
-
-
0009450159
-
Water-quality assessment of the South Platte River Basin, Colorado, Nebraska, and Wyoming- Analysis of available nutrient, suspended-sediment, and pesticide data, water years 1980-92
-
94-4095, 145 p. United States Geological Survey, Washington, DC
-
Dennehy, K.F., D.W. Litke, P.B. McMahon, J.S. Heiny, and C.M. Tate. 1995. Water-quality assessment of the South Platte River Basin, Colorado, Nebraska, and Wyoming- Analysis of available nutrient, suspended-sediment, and pesticide data, water years 1980-92. Water Resources Investigation Report 94-4095, 145 p. United States Geological Survey, Washington, DC.
-
(1995)
Water Resources Investigation Report
-
-
Dennehy, K.F.1
Litke, D.W.2
McMahon, P.B.3
Heiny, J.S.4
Tate, C.M.5
-
15
-
-
0003627110
-
Methods of analysis by the U.S. Geological Survey National Water Quality Laboratory-Determination of metals in water by inductively coupled plasma-mass spectrometry
-
92-634, 33 p. U.S. Geological Survey, Washington, DC
-
Faires, L.M. 1993. Methods of analysis by the U.S. Geological Survey National Water Quality Laboratory-Determination of metals in water by inductively coupled plasma-mass spectrometry. Open-File Report 92-634, 33 p. U.S. Geological Survey, Washington, DC.
-
(1993)
Open-File Report
-
-
Faires, L.M.1
-
16
-
-
0003465692
-
Methods of analysis by the U.S. Geological Survey National Water Quality Laboratory-Determination of inorganic and organic constituents in water and fluvial sediments
-
Fishman, M.J, ed, 93-125, 216 p. U.S. Geological Survey, Washington, DC
-
Fishman, M.J. (ed.). 1993. Methods of analysis by the U.S. Geological Survey National Water Quality Laboratory-Determination of inorganic and organic constituents in water and fluvial sediments. Open-File Report 93-125, 216 p. U.S. Geological Survey, Washington, DC.
-
(1993)
Open-File Report
-
-
-
17
-
-
51849116880
-
-
Gilliom, R.J., J.E. Barbash, C.G. Crawford, P.A. Hamiton, J.D. Martin, N. Nakagaki, L.H. Nowell, J.C. Scott, P.E. Stackelberg, G.P. Thelin, and D.M. Wolack. 2006. The quality of our Nation's waters - Pesticides in the Nation's streams and ground water, 1992-2001. Circular 1291, 172 p. U.S. Geological Survey, Washington, DC.
-
Gilliom, R.J., J.E. Barbash, C.G. Crawford, P.A. Hamiton, J.D. Martin, N. Nakagaki, L.H. Nowell, J.C. Scott, P.E. Stackelberg, G.P. Thelin, and D.M. Wolack. 2006. The quality of our Nation's waters - Pesticides in the Nation's streams and ground water, 1992-2001. Circular 1291, 172 p. U.S. Geological Survey, Washington, DC.
-
-
-
-
19
-
-
51849141400
-
-
Helsel, D.R., and R.M. Hirsch. 2002. Statistical methods in water resources. U.S. Geological Survey Techniques of Water Resources Investigations. Book 4, Chapter A3, 510 p. U.S. Geological Survey, Washington, DC.
-
Helsel, D.R., and R.M. Hirsch. 2002. Statistical methods in water resources. U.S. Geological Survey Techniques of Water Resources Investigations. Book 4, Chapter A3, 510 p. U.S. Geological Survey, Washington, DC.
-
-
-
-
20
-
-
9844239041
-
Hydrogeologic characteristics of the valley-fill aquifer in the Greeley reach of the South Platte River Valley, Colorado
-
73-124, 4 p. U.S. Geological Survey, Washington, DC
-
Hurr, R.T., and P.A. Schneider. 1972. Hydrogeologic characteristics of the valley-fill aquifer in the Greeley reach of the South Platte River Valley, Colorado. Open-File Report 73-124, 4 p. U.S. Geological Survey, Washington, DC.
-
(1972)
Open-File Report
-
-
Hurr, R.T.1
Schneider, P.A.2
-
21
-
-
51849141864
-
-
Colorado Water Resources Circular, 24 p. Colorado Water Conservation Board, Denver, CO
-
Hurr, R.T., P.A. Schneider, and D.R. Minges. 1975. Hydrology of the South Platte River Valley, northeastern Colorado. Colorado Water Resources Circular No. 28, 24 p. Colorado Water Conservation Board, Denver, CO.
-
(1975)
Hydrology of the South Platte River Valley, northeastern Colorado
, Issue.28
-
-
Hurr, R.T.1
Schneider, P.A.2
Minges, D.R.3
-
22
-
-
0001811221
-
Tracing nitrogen sources and cycling in catchments
-
C. Kendall and J.J. McDonnell ed, Elsevier, Amsterdam
-
Kendall, C. 1998. Tracing nitrogen sources and cycling in catchments. p. 519-576. In C. Kendall and J.J. McDonnell (ed.) Isotope tracers in catchment hydrology. Elsevier, Amsterdam.
-
(1998)
Isotope tracers in catchment hydrology
, pp. 519-576
-
-
Kendall, C.1
-
23
-
-
0020064009
-
Denitrification
-
Knowles, R. 1982. Denitrification. Microbiol. Rev. 46:43-70.
-
(1982)
Microbiol. Rev
, vol.46
, pp. 43-70
-
-
Knowles, R.1
-
24
-
-
0029668915
-
Occurrence of selected pesticides and their metabolites in near-surface aquifer of the Midwestern United States
-
Kolpin, D.W., E.M. Thurman, and D.A. Goolsby. 1996. Occurrence of selected pesticides and their metabolites in near-surface aquifer of the Midwestern United States. Environ. Sci. Technol. 30:334-340.
-
(1996)
Environ. Sci. Technol
, vol.30
, pp. 334-340
-
-
Kolpin, D.W.1
Thurman, E.M.2
Goolsby, D.A.3
-
25
-
-
0003549483
-
Ground-water data-collection protocols and procedures - Collection and documentation of water-quality samples and related data
-
95-399, 124 p. U.S. Geological Survey, Washington, DC
-
Koterba, M.T., F.D. Wilde, and W.W. Lapham. 1995. Ground-water data-collection protocols and procedures - Collection and documentation of water-quality samples and related data. Open-File Report 95-399, 124 p. U.S. Geological Survey, Washington, DC.
-
(1995)
Open-File Report
-
-
Koterba, M.T.1
Wilde, F.D.2
Lapham, W.W.3
-
26
-
-
0003549498
-
Ground-water data-collection protocols and procedures for the National Water-Quality Assessment program- Selection, installation, and documentation of wells, and collection of related data
-
95-398, 76 p. U.S. Geological Survey, Washington, DC
-
Lapham, W.W., F.D. Wilde, and M.T. Koterba. 1995. Ground-water data-collection protocols and procedures for the National Water-Quality Assessment program- Selection, installation, and documentation of wells, and collection of related data. Open-File Report 95-398, 76 p. U.S. Geological Survey, Washington, DC.
-
(1995)
Open-File Report
-
-
Lapham, W.W.1
Wilde, F.D.2
Koterba, M.T.3
-
27
-
-
11744256437
-
Integrating tributary groundwater development into the Prior Appropriation System- the South Platte experience
-
no. 148, 56 p. Colorado State Univ, Colorado Water Resources Research Inst, Fort Collins
-
MacDonnell, L.J. 1988. Integrating tributary groundwater development into the Prior Appropriation System- the South Platte experience. Completion Report no. 148, 56 p. Colorado State Univ., Colorado Water Resources Research Inst., Fort Collins.
-
(1988)
Completion Report
-
-
MacDonnell, L.J.1
-
28
-
-
1642488907
-
Pacific and Atlantic Ocean influences on multidecadal drought frequency in the United States
-
McCabe, G.J., M.A. Palecki, and J.L. Betancourt. 2004. Pacific and Atlantic Ocean influences on multidecadal drought frequency in the United States. Proc. Natl. Acad. Sci. USA 101(12):4136-4141.
-
(2004)
Proc. Natl. Acad. Sci. USA
, vol.101
, Issue.12
, pp. 4136-4141
-
-
McCabe, G.J.1
Palecki, M.A.2
Betancourt, J.L.3
-
29
-
-
0030588345
-
Denitrification and mixing in a stream-aquifer system-Effects on nitrate loading to surface water
-
McMahon, P.B., and J.K. Böhlke. 1996. Denitrification and mixing in a stream-aquifer system-Effects on nitrate loading to surface water. J. Hydrol. 186:105-128.
-
(1996)
J. Hydrol
, vol.186
, pp. 105-128
-
-
McMahon, P.B.1
Böhlke, J.K.2
-
30
-
-
33646379619
-
Regional patterns in the isotopic composition of natural and anthropogenic nitrate in ground water, High Plains, USA
-
McMahon, P.B., and J.K. Böhlke. 2006. Regional patterns in the isotopic composition of natural and anthropogenic nitrate in ground water, High Plains, USA. Environ. Sci. Technol. 40:2965-2970.
-
(2006)
Environ. Sci. Technol
, vol.40
, pp. 2965-2970
-
-
McMahon, P.B.1
Böhlke, J.K.2
-
32
-
-
0003797509
-
Nutrients in ground water and surface water of the United States-An analysis of data through 1992
-
95-4031, 81 p. U.S. Geological Survey, Washington, DC
-
Mueller, D.K., P.A. Hamilton, D.R. Helsel, K.J. Hitt, and B.C. Ruddy. 1995. Nutrients in ground water and surface water of the United States-An analysis of data through 1992. Water Resources Investigation Report 95-4031, 81 p. U.S. Geological Survey, Washington, DC.
-
(1995)
Water Resources Investigation Report
-
-
Mueller, D.K.1
Hamilton, P.A.2
Helsel, D.R.3
Hitt, K.J.4
Ruddy, B.C.5
-
33
-
-
51849155090
-
-
Mueller, D.K., and D.R. Helsel. 1996. Nutrients in the Nation's waters- Too much of a good thing? Circular 1136, 24 p. U.S. Geological Survey, Washington, DC.
-
Mueller, D.K., and D.R. Helsel. 1996. Nutrients in the Nation's waters- Too much of a good thing? Circular 1136, 24 p. U.S. Geological Survey, Washington, DC.
-
-
-
-
34
-
-
0019852210
-
-
Nadler, C.T., and S.A. Schumm. 1981. Metamorphosis of South Platte and Arkansas Rivers, Eastern Colorado. Phys. Geol. 2(2):95-115.
-
Nadler, C.T., and S.A. Schumm. 1981. Metamorphosis of South Platte and Arkansas Rivers, Eastern Colorado. Phys. Geol. 2(2):95-115.
-
-
-
-
35
-
-
51849129975
-
-
Available at, verified 30 June 2008, NOAA, Washington, DC
-
National Oceanic and Atmospheric Administration. 2003. Normal precipiration data for Colorado. Available at http://www.ncdc.noaa.gov/oa/pub/ data/coop-precip/colorado.txt (verified 30 June 2008). NOAA, Washington, DC.
-
(2003)
Normal precipiration data for Colorado
-
-
-
36
-
-
33746431003
-
Methods of analysis by the U.S. Geological Survey National Water Quality Laboratory- Evaluation of alkaline persulfate digestion as an alternative to Kjeldahl digestion for determination of total and dissolved nitrogen and phosphorus in water
-
03-4174, 40 p. U.S. Geological Survey, Washington, DC
-
Patton, C.J., and J.R. Kryskalla. 2003. Methods of analysis by the U.S. Geological Survey National Water Quality Laboratory- Evaluation of alkaline persulfate digestion as an alternative to Kjeldahl digestion for determination of total and dissolved nitrogen and phosphorus in water. Water-Resources Investigations Report 03-4174, 40 p. U.S. Geological Survey, Washington, DC.
-
(2003)
Water-Resources Investigations Report
-
-
Patton, C.J.1
Kryskalla, J.R.2
-
37
-
-
0003454998
-
Nonpoint and point sources of nitrogen in major watersheds in the United States
-
94-4001, 12 p. U.S. Geological Survey, Washington, DC
-
Puckett, L.J. 1994. Nonpoint and point sources of nitrogen in major watersheds in the United States. Water-Resources Investigations Report 94-4001, 12 p. U.S. Geological Survey, Washington, DC.
-
(1994)
Water-Resources Investigations Report
-
-
Puckett, L.J.1
-
38
-
-
51849116896
-
Comparison of the ground-water quality trend component of U.S. Geological Survey National Water-Quality Assessment Program to other national designs
-
Rosen, M.R., F.D. Voss, and J.A. Arufe. 2008. Comparison of the ground-water quality trend component of U.S. Geological Survey National Water-Quality Assessment Program to other national designs. J. Environ. Qual. 37:S-199-S-208.
-
(2008)
J. Environ. Qual
, vol.37
-
-
Rosen, M.R.1
Voss, F.D.2
Arufe, J.A.3
-
39
-
-
51849094465
-
-
Rounds, S.A., and F.D. Wilde. 2001. Alkalinity and acid neutralizing capacity. In F.D. Wilde and D.B. Radtke (eds.) National field manual for the collection of water-quality data. U.S. Geological Survey Techniques of Water-Resources Investigations, Book 9, Chapter A6.6, 50 p. U.S. Geological Survey, Washington, DC.
-
Rounds, S.A., and F.D. Wilde. 2001. Alkalinity and acid neutralizing capacity. In F.D. Wilde and D.B. Radtke (eds.) National field manual for the collection of water-quality data. U.S. Geological Survey Techniques of Water-Resources Investigations, Book 9, Chapter A6.6, 50 p. U.S. Geological Survey, Washington, DC.
-
-
-
-
40
-
-
51849089716
-
-
Ruddy, B.C., D.L. Lorenz, and D.K. Mueller. 2006. County-level estimates of nutrient inputs to the land surface of the conterminous United States, 1982-2001. Scientific Investigations Report 2006-5012, 23 p. U.S. Geological Survey, Washington, DC.
-
Ruddy, B.C., D.L. Lorenz, and D.K. Mueller. 2006. County-level estimates of nutrient inputs to the land surface of the conterminous United States, 1982-2001. Scientific Investigations Report 2006-5012, 23 p. U.S. Geological Survey, Washington, DC.
-
-
-
-
41
-
-
33645183455
-
Probability of detecting atrazine/desethyl-atrazine and elevated concentrations of nitrate in ground water in Colorado
-
02-4269, 40 p. U.S. Geological Survey, Washington, DC
-
Rupert, M.G. 2003. Probability of detecting atrazine/desethyl-atrazine and elevated concentrations of nitrate in ground water in Colorado. Water-Resources Investigations Report 02-4269, 40 p. U.S. Geological Survey, Washington, DC.
-
(2003)
Water-Resources Investigations Report
-
-
Rupert, M.G.1
-
42
-
-
33644767643
-
Methods of analysis by the U.S. Geological Survey National Water Quality Laboratory-Determination of moderate-use pesticides and selected degradates in water by C-18 solid-phase extraction and gas chromatography/mass spectrometry
-
01-4098, 78 p. U.S. Geological Survey, Washington, DC
-
Sandstrom, M.W., M.E. Stroppel, W.T. Foreman, and M.P. Schroeder. 2001. Methods of analysis by the U.S. Geological Survey National Water Quality Laboratory-Determination of moderate-use pesticides and selected degradates in water by C-18 solid-phase extraction and gas chromatography/mass spectrometry. Water-Resources Investigations Report 01-4098, 78 p. U.S. Geological Survey, Washington, DC.
-
(2001)
Water-Resources Investigations Report
-
-
Sandstrom, M.W.1
Stroppel, M.E.2
Foreman, W.T.3
Schroeder, M.P.4
-
43
-
-
0003069870
-
Nitrates can leach but they can't hide
-
Schuff, S. 1992. Nitrates can leach but they can't hide. Colorado Rancher and Farmer, p. 6-14.
-
(1992)
Colorado Rancher and Farmer
, pp. 6-14
-
-
Schuff, S.1
-
44
-
-
0003619205
-
Computerized stratified random site-selection approaches for design of a ground-water-quality sampling network
-
90-4101, 114 p. U.S. Geological Survey, Washington, DC
-
Scott, J.C. 1990. Computerized stratified random site-selection approaches for design of a ground-water-quality sampling network. Water-Resources Investigations Report 90-4101, 114 p. U.S. Geological Survey, Washington, DC.
-
(1990)
Water-Resources Investigations Report
-
-
Scott, J.C.1
-
45
-
-
23844503721
-
11B to evaluate nitrate contamination in ground water
-
11B to evaluate nitrate contamination in ground water. Appl. Geochem. 20:1626-1636.
-
(2005)
Appl. Geochem
, vol.20
, pp. 1626-1636
-
-
Seiler, R.L.1
-
46
-
-
0035449489
-
A bacterial method for the nitrogen isotopic analysis of nitrate in seawater and freshwater
-
Sigman, D.M., K.L. Casciotti, M.C. Andreani, C. Barford, M. Galanter, and J.K. Böhlke. 2001. A bacterial method for the nitrogen isotopic analysis of nitrate in seawater and freshwater. Anal. Chem. 73:4145-4153.
-
(2001)
Anal. Chem
, vol.73
, pp. 4145-4153
-
-
Sigman, D.M.1
Casciotti, K.L.2
Andreani, M.C.3
Barford, C.4
Galanter, M.5
Böhlke, J.K.6
-
47
-
-
51849166510
-
-
Colorado. Water-Supply Paper 1658, 149 p. U.S. Geological Survey, Washington, DC
-
Smith, R.O., P.A. Schneider, and L.R. Petri. 1964. Ground-water resources of rhe South Platte River basin in western Adams and southwestern Weld Counties, Colorado. Water-Supply Paper 1658, 149 p. U.S. Geological Survey, Washington, DC.
-
(1964)
Ground-water resources of rhe South Platte River basin in western Adams and southwestern Weld Counties
-
-
Smith, R.O.1
Schneider, P.A.2
Petri, L.R.3
-
48
-
-
0027625059
-
Occurrence of nitrate in ground water- A review
-
Spalding, R.F., and M.E. Exner. 1993. Occurrence of nitrate in ground water- A review. J. Environ. Qual. 22:392-402.
-
(1993)
J. Environ. Qual
, vol.22
, pp. 392-402
-
-
Spalding, R.F.1
Exner, M.E.2
-
49
-
-
0003802097
-
-
USEPA, February, EPA 810-F-94-001A, 8 p. USEPA, Office of Water, Washington, DC
-
USEPA. 1994. National primary drinking water standards, February 1994. EPA 810-F-94-001A, 8 p. USEPA, Office of Water, Washington, DC.
-
(1994)
National primary drinking water standards
-
-
-
51
-
-
51849094942
-
-
USEPA. 2004. EPA regional priority AFO science question synthesis document- nitrogen source tracking: Supporting documentation for the EPA Regional Science Workshop on Animal Feeding Operations (AFOS). December 6-9, 2004. College Park, Maryland. Available at http://www.epa.gov/OSP/regions/afo. htm (verified 30 June 2008). USEPA, Washington, DC.
-
USEPA. 2004. EPA regional priority AFO science question synthesis document- nitrogen source tracking: Supporting documentation for the EPA Regional Science Workshop on Animal Feeding Operations (AFOS). December 6-9, 2004. College Park, Maryland. Available at http://www.epa.gov/OSP/regions/afo. htm (verified 30 June 2008). USEPA, Washington, DC.
-
-
-
-
52
-
-
51849090595
-
-
U.S. Geological Survey, variously dated. National field manual for the collection of water-quality data. U.S. Geological Survey Techniques of Water-Resources Investigations, Book 9, Chaps. A1-A9. Available at http://pubs.water.usgs.gov/twri9A (verified 30 June 2008). U.S. Geological Survey, Washington, DC.
-
U.S. Geological Survey, variously dated. National field manual for the collection of water-quality data. U.S. Geological Survey Techniques of Water-Resources Investigations, Book 9, Chaps. A1-A9. Available at http://pubs.water.usgs.gov/twri9A (verified 30 June 2008). U.S. Geological Survey, Washington, DC.
-
-
-
-
53
-
-
0003835526
-
Methods of analysis by the U.S. Geological Survey National Water Quality Laboratory-Determination of pesticides in water by C-18 solid-phase extraction and capillary-column gas chromatography/mass spectrometry with selected-ion monitoring
-
95-181, 54 p. U.S. Geological Survey, Washington, DC
-
Zaugg, S.D., M.W. Sandstrom, S.G. Smith, and K.M. Fehlberg. 1995. Methods of analysis by the U.S. Geological Survey National Water Quality Laboratory-Determination of pesticides in water by C-18 solid-phase extraction and capillary-column gas chromatography/mass spectrometry with selected-ion monitoring. Open-File Report 95-181, 54 p. U.S. Geological Survey, Washington, DC.
-
(1995)
Open-File Report
-
-
Zaugg, S.D.1
Sandstrom, M.W.2
Smith, S.G.3
Fehlberg, K.M.4
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