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Page 5144, results 128576 - 128600

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Not all publications have extents, not all extents are completely accurate
Effects of weather on breeding ducks in North Dakota
M.C. Hammond, Douglas H. Johnson
1984, Fish and Wildlife Technical Report 1
The present report quantifies relations between weather and several aspects of the breeding biology of four duck species: mallard (Anas platyrhynchos), gadwall (A. strepera), blue-winged teal (A. discors), and redhead (Aythya americana). Data were obtained from two locations in North Dakota,--the J. Clark Salyer National Wildlife Refuge, intermittently during 1936-68,...
Submersible pressure outflow cell for measurement of soil water retention and diffusivity from 5 to 95 degrees C
Jim Constantz, W.N. Herkelrath
1984, Soil Science Society of America Journal (48) 7-10
A technique was developed to measure water content in soil as a function of capillary pressure from 5 to 95°C. To overcome problems encountered at high temperature, a modified Tempe pressure cell containing a soil sample is suspended in a constant-temperature water bath. The cell's porous plate is in direct...
Crassulacean acid metabolism in submerged aquatic plants
Jon E. Keeley
C. Sybesme, editor(s)
1984, Book chapter, Advances in Photosynthesis Research: Proceedings of the VIth International Congress on Photosynthesis (Volume IV)
CO2-fixation in the dark is known to occur in various organs of many plants. However, only in species possessing crassulacean acid metabolism (CAM) does dark CO2-fixation contribute substantially to the carbon economy of the plant. Until very recently CAM was known only from terrestrial...
SOME APPLICATIONS OF SEISMIC SOURCE MECHANISM STUDIES TO ASSESSING UNDERGROUND HAZARD.
Art McGarr
Gay N.C.Wainwright E.H., editor(s)
1984, Conference Paper
Various measures of the seismic source mechanism of mine tremors, such as magnitude, moment, stress drop, apparent stress, and seismic efficiency, can be related directly to several aspects of the problem of determining the underground hazard arising from strong ground motion of large seismic events. First, the relation between the...
Land subsidence near oil and gas fields, Houston, Texas
T.L. Holzer, R.L. Bluntzer
1984, Groundwater (22) 450-459
Subsidence profiles across 29 oil and gas fields in the 12,200-km2 Houston, Texas, regional subsidence area, which is caused by decline of ground-water level, suggest that the contribution of petroleum withdrawal to local land subsidence is small. Despite large volumes of petroleum production, subsidence at most...
Pond culture systems
J.V. Huner, H.K. Dupree
Dupree H. K., Huner J. V., editor(s)
1984, Book chapter, Third Report to the Fish Farmers: The Status of Warmwater Fish Farming Research
No abstract available at this time...
Multiple use of land and water
J.V. Huner, H.K. Dupree
Dupree H. K., Huner J. V., editor(s)
1984, Book chapter, Third Report to the Fish Farmers: The Status of Warmwater Fish Farming Research
No abstract available at this time...
Some parasites of exotic fishes
G. L. Hoffman, G. Schubert
W. R. Courtenay Jr., J. R. Stauffer Jr., editor(s)
1984, Book chapter, Distribution, Biology and Management of Exotic Fishes
No abstract available at this time...
Diagnostic services available
G. L. Hoffman, A.J. Mitchell
Dupree H. K., Huner J. V., editor(s)
1984, Book chapter, Third Report to the Fish Farmers: The Status of Warmwater Fish Farming Research
No abstract available at this time...
Characterization and geochemistry of Devonian oil shale North Alabama - South Central Tennessee
K.F. Rheams, T.L. Neathery
1984, Conference Paper, Preprints
Based on the physical and chemical data obtained to date, the Devonian oil shale rock of north Alabama and south-central Tennessee appears to offer an attractive potential for future resource development. The shale rock appears to have formed in a restrictive marine environment which provided opportunity for the accumulation of...
The Kingak shale of northern Alaska—regional variations in organic geochemical properties and petroleum source rock quality
Leslie B. Magoon, George E. Claypool
1984, Organic Geochemistry (6) 533-542
The Kingak Shale, a thick widespread rock unit in northern Alaska that ranges in age from Early Jurassic through Early Cretaceous, has adequate to good oil source rock potential. This lenticular-shaped rock unit is as much as 1200 m thick near the Jurassic shelf edge, where its present-day burial depth...
Sulfur and oxygen isotopic systematics of the 1982 eruptions of El Chichón Volcano, Chiapas, Mexico
R. O. Rye, J.F. Luhr, M.D. Wasserman
1984, Journal of Volcanology and Geothermal Research (23) 109-123
Thermometers based on sulfur and oxygen isotopic compositions of anhydrite, pyrrhotite, titanomagnetite, and plagioclase crystals from fresh pumices of the 1982 eruptions of El Chichón Volcano indicate a pre-eruption temperature of 810 ± 40°C, confirming textural evidence that the anhydrite precipitated directly from the melt. The isotopic composition of sulfate...
Topography of the shield volcano, Olympus Mons on Mars
S.S.C. Wu, P. A. Garcia, R. Jordan, F.J. Schafer, B.A. Skiff
1984, Nature (309) 432-435
Olympus Mons, one of the largest known shield volcanoes in the Solar System, covers an area of >3.2 ?? 105 km2and has a diameter of >600 km, excluding its vast aureole deposits. The structure is five times larger than the largest shield volcano on the Earth. It is situated on...