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Page 3882, results 97026 - 97050

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Not all publications have extents, not all extents are completely accurate
Spatial data in geographic information system format on agricultural chemical use, land use, and cropping practices in the United States
William A. Battaglin, Donald A. Goolsby
1995, Water-Resources Investigations Report 94-4176
The spatial data in geographic information system format described in this report consist of estimates for all counties in the conterminous United States of the annual use of 96 herbicides in 1989; annual sales of nitrogen fertilizer, in tons, for 1985-91; and agricultural expenses, land use, chemical use, livestock holdings,...
Seasonal cycles in streamwater quality on Catoctin Mountain, Maryland
Karen C. Rice, Owen P. Bricker
1995, Fact Sheet 136-95
In 1980, the U.S. Congress mandated the National Acid Precipitation Assessment Program (NAPAP) to study the effects of acidic precipitation (acid rain). In 1982, the U.S. Geological Survey (USGS) was selected to be the lead Federal agency under NAPAP to monitor the composition of precipitation and its effects on the...
Dissolved pesticide data for the San Joaquin River at Vernalis and the Sacramento River at Sacramento, California, 1991-94
Dorene E. MacCoy, Kathryn L. Crepeau, Kathryn Kuivila
1995, Open-File Report 95-110
Water samples were collected from sites on the San Joaquin and Sacramento Rivers, California and were analyzed for dissolved organic pesticides. This data collection and analysis are a part of an ongoing project by the U.S. Geological Survey Toxic Contaminants Hydrology program to determine the fate and transport of organic...
Methane in coastal sea water, sea ice, and bottom sediments, Beaufort Sea, Alaska
T.D. Lorenson, Keith A. Kvenvolden
1995, Open-File Report 95-70
This report summarizes data acquired from 1990 to 1994 for the gas-hydrate portion of the USGS project 'Permafrost and gas hydrate as possible sources of methane' of the USGS Global Change and Climate History program. The objective of this project has been to test the hypothesis that gas hydrate deposits...
Report on the U.S. Geological Survey's evaluation program for standard reference samples distributed in October 1994 : T-131 (trace constituents), T-133 (trace constituents), M-132 (major constituents), N-43 (nutrients), N-44 (nutrients), P-23 (low ionic strength) and Hg-19 (mercury)
H. Keith Long, Jerry W. Farrar
1995, Open-File Report 95-117
This report presents the results of the U.S. Geological Survey's analytical evaluation program for 7 standard reference samples--T-131 (trace constituents), T-133 (trace constituents), M-132 (major constituents), N-43 (nutrients), N-44 (nutrients), P-23 (low ionic strength), and Hg-19 (mercury). The samples were distributed in October 1994 to 131 laboratories registered in the...
Hydrologic data for the Fristoe Unit of the Mark Twain National Forest, southern Missouri, 1988-93
Michael J. Kleeschulte, S. J. Sutley
1995, Open-File Report 95-106
Background hydrologic data were collected from 1988 to 1993 in the Fristoe Unit of the Mark Twain National Forest. Water-quality data collected from area streams, springs, and wells were analyzed using trilinear diagrams, stiff diagrams, boxplots, and summary statistics. The water is a calcium- magnesium-bicarbonate type. Streams generally have slightly...
Selected hydrologic data for the Mesilla ground-water basin, 1987 through 1992 water years, Doña Ana County, New Mexico, and El Paso County, Texas
Edward L. Nickerson
1995, Open-File Report 95-111
The Mesilla ground-water basin monitoring program was established in 1987 to document hydrologic conditions and establish a long-term, continuous data base to permit future quantitative evaluation of the ground-water flow system and stream/aquifer relations. Data collection is divided into three program elements. These are the (1) Mesilla ground- water basin...