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United States Environmental Protection Agency
EPA National Library Network
Search Results for the EPA National Library Catalog
Items Found: 1147
Showing: Items 451 - 500
Your Search: (SUBJECT=Inorganic nitrates)
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Nitrates in Groundwater Resulting from Manure Applications to Irrigated Croplands.
Nitrite-Accelerated Photochemical Degradation of Cellulose as a Pretreatment for Microbiological Conversion to Protein.
Nitrogen and irrigation management to reduce return-flow pollution in the Columbia Basin /
Nitrogen and phosphorus in wastewater effluents, working paper no. 22, a prelim. analysis of Nat. Eutrophication Survey data collected during the 1972-73 sampling period.
Nitrogen and phosphorus losses from agronomy plots in North Alabama,
Nitrogen in Industry.
Nitrogen Removal from Wastewaters.
North Carolina barrier islands wastewater management final environmental impact statement /
North Waubay Lake, Day County, South Dakota.
Northboro, Hudson, Maynard, and Billerica Impoundments, Worcester and Middlesex Counties, Massachusetts.
Nutrient Limitation and Adaption of Microbial Populations to Chemical Transformations.
Nutrient Management. Supplement to the Journal of Soil and Water Conservation Volume 49, Number 2.
Nutrient Regeneration by Zooplankton in Southern Lake Huron.
Nutrient Removal from Wastewater by Physical-Chemical Processes.
Nutritional Requirements of the Submerged Angio-Sperm 'Ruppia maritima' in Algae-Free Culture.
O'Shaughnessy Reservoir, Delaware County, Ohio.
O. C. Fisher (San Angelo) Reservoir, Tom Green County, Texas.
Oconomowoc Lake, Waukesha County, Wisconsin.
Okauchee Lake, Waukesha County, Wisconsin.
Old Ben Mine Reservoir, Franklin County, Illinois.
Olin Lake, LaGrange County, Indiana.
Oliver Lake, LaGrange County, Indiana.
On-Line Colorimetric Analyzers for Monitoring Nitrate-Nitrite, Ammonia, Orthophosphorus and Total Hydrolyzable Phosphorus in Wastewater-Treatment Process Streams.
One Mgd Ion Exchange Plant for Removal of Nitrate from Well Water.
Oradell Reservoir, Bergen County, New Jersey.
Otter Lake, Cayuga County, New York.
Overland recycling system for animal waste treatment /
Owasco Lake, Cayuga County, New York.
Pactola Reservoir, Pennington County, South Dakota.
Particle size distribution of nitrate aerosols in the Los Angeles air basin /
Paulinskill Lake, Sussex County, New Jersey.
Pelican Lake, Bottineau County, North Dakota.
Pelican Lake, St. Louis County, Minnesota.
Permuted Index to Current Eutrophication Literature.
Petenwell Flowage, Juneau, Adams, and Wood Counties, Wisconsin.
Pewaukee Lake, Waukesha County, Wisconsin. EPA Region V.
Phosphate reduction and response of plankton populations in Kootenay Lake /
Photochemical aerosol dynamics /
Pickwick Lake, Colbert and Lauderdale Counties, Alabama. Tishomingo County, Mississippi. Harding County, Tennessee.
Pigeon Lake, Steuben County, Indiana.
Pine Lake, Waukesha County, Wisconsin. EPA Region V.
Pinecliff Lake, Passaic County, New Jersey.
Piscataway Creek Watershed Model: A Stormwater and Nonpoint Source Management Tool.
Pleasant Hill Reservoir, Ashland and Richland Counties.
Pollution control manual for irrigated agriculture /
Pollution Studies of the Regional Ogallala Aquifer at Portales, New Mexico.
Pompton Lakes, Passaic County, New Jersey.
Possibility of Reducing Nitrogen in Drainage Water by on Farm Practices
Powder Mill Pond, Hillsborough County, New Hampshire.
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