Search Results for the EPA National Library Catalog

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Select Item Title Year Published
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
The role of nitrogen in the acidification of soils and surface waters / 1989
The role of nitrogen in the aquatic environment / 1972
Trends in phosphorus, nitrogen, Secchi depth, and dissolved oxygen in Chesapeake Bay, 1984 to 1992. 1994
Water balance and quantification of total phosphorus and total nitrogen loads entering and leaving the Lago de Cidra, central Puerto Rico 1997
Water nutrients. No. 2, study number 36, Report of a study conducted by Analytical Reference Service / 1970
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
Willamette Basin, Oregon : nitrogen in streams and ground water, 1980-90 / 1996
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