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Search Results for the EPA National Library Catalog
Items Found: 100
Showing: Items 51 - 100
Your Search: (SUBJECT=Water Nitrogen content)
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Title
Year Published
51
Nitrogen and phosphorus determinations in estuarine waters : a comparison of methods used in Chesapeake Bay monitoring /
1987
52
Nitrogen concentrations and deposition in rainfall at two sites in the Coastal Bend area, South Texas, 1996-98
1999
53
Nitrogen in ground water and surface water from sewered and unsewered areas, Nassau County, Long Island, New York
1980
54
Nitrogen in the environment : sources, impacts, management /
1993
55
Nitrogen loadings from agricultural activities in the Great Lakes Basin : integration report on nitrogen agricultural watershed studies /
1978
56
Nitrogen removal from wastewaters.
1970
57
Nitrogen source differentiation through carbon isotopes technical completion report /
1977
58
Nitrogen sources and cycling in natural waters /
1973
59
Nitrogen transport and transformations in Canagagigue Creek : final report project 19A, agricultural watershed studies /
1978
60
Nitrogen, phosphorus, and carbon flux in Chesapeake Bay marshes
1976
61
Nonpoint and point sources of nitrogen in major watersheds of the United States /
1994
62
Nonpoint source - stream nutrient level relationships : a nationwide study /
1977
63
Nutrient concentrations, loads, and yields in the Eucha-Spavinaw Basin, Arkansas and Oklahoma, 2002-2004 /
2006
64
Nutrients in the nation's streams and groundwater, 1992-2004 /
2010
65
Occurrence and formation of nitrogenous disinfection by-products /
2009
66
Occurrence of nitrate, pesticides, and volatile organic compounds in the Kirkwood-Cohansey Aquifer system, southern New Jersey
1997
67
Organic nitrogen in drinking water and reclaimed waste water /
2006
68
Patterns and processes of variation in nitrogen and phosphorus concentrations in forested streams
2001
69
Percentile distributions of median nitrite plus nitrate as nitrogen, total nitrogen, and total phosphorus concentrations in Oklahoma streams, 1973-2001
2003
70
Phase III actions for hypoxia management /
1998
71
Physical and chemical removal of nutrients
1968
72
PLUARG task C study on runoff sediment, total phosphorus filtered reactive phosphorus, (nitrate + nitrite) nitrogen, and ammonium nitrogen -- Maumee River basin /
1978
73
Preservation of wastewater effluent samples for forms of nitrogen and phosphorus /
1975
74
Proceedings : IAWPR specialized conference, Copenhagen, Denmark, 18-20th August, 1975.
1975
75
Process design manual for nitrogen control /
1975
76
Protocol for evaluating the nitrogen status of lake sediments /
1974
77
Relation between nitrate in water wells and potential sources in the lower Yakima Valley, Washington /
2013
78
Relation between nitrate in water wells and potential sources in the lower Yakima valley, Washington /
2012
79
Relation of land use to nitrogen concentration in ground water in the Patuxent River Basin, Maryland /
1995
80
Report on sediment and nutrient loading goals study /
1986
81
Report to U.S. Public Health Service Region IX, Water Supply and Pollution Control Division on a study of methods suitable for the analysis and preservation of nitrogen forms in an estuarine environment.
1965
82
Results of lead time studies of baseline chemical nutrients in Lake George and Nitrogen cycles in the Lake George ecosystem
1971
83
Review and synthesis of available information to estimate human impacts to dissolved oxygen in Hood Canal /
2013
84
Source apportionment of nitrogen and phosphorus inputs into the aquatic environment
2005
85
Sources and sinks of nitrogen and phosphorus : water quality management of Lake George (N.Y.) /
1972
86
Sources of nitrogen and phosphorus in the Lake George drainage basin: a double lake /
1973
87
Spatial and temporal resource allocation methods for agricultural watershed planning : thesis /
1973
88
Studies of the agricultural contribution to nitrate enrichment of groundwater and the subsequent loading to surface waters /
1978
89
The dilution/flushing technique in lake restoration /
1981
90
The Drinking water criteria document on nitrate/nitrite /
1990
91
The fate and effects of nitrogen and phosphorus enrichment in shallow ponds /
2001
92
The Relationships of phosphorus and nitrogen to the trophic state of northeast and north-central lakes and reservoirs : preliminary analysis of National Eutrophication Survey data collected during the 1972-73 sampling period.
1974
93
The role of nitrogen in the acidification of soils and surface waters /
1989
94
The role of nitrogen in the aquatic environment /
1972
95
Trends in phosphorus, nitrogen, Secchi depth, and dissolved oxygen in Chesapeake Bay, 1984 to 1992.
1994
96
Water balance and quantification of total phosphorus and total nitrogen loads entering and leaving the Lago de Cidra, central Puerto Rico
1997
97
Water nutrients no. 1 : study number 27 : report of a study conducted by Analytical Reference Service. /
1966
98
Water nutrients. No. 2, study number 36, Report of a study conducted by Analytical Reference Service /
1970
99
Well data, surface-water discharges, and nitrate concentrations, February 1986 - September 1987, in parts of the Pasco Basin, Washington / by B.W. Drost ... {et al.} ; prepared in cooperation with the State of Washington Department of Ecology.
1989
100
Willamette Basin, Oregon : nitrogen in streams and ground water, 1980-90 /
1996
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