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Articles 49201 - 49230 of 52443
Full-Text Articles in Physical Sciences and Mathematics
Distribution Of Phytoplankton In Utah Lakes, L. R. Williams, S. C. Hern, V. W. Lambou, F. A. Morris, M. K. Morris, W. D. Taylor
Distribution Of Phytoplankton In Utah Lakes, L. R. Williams, S. C. Hern, V. W. Lambou, F. A. Morris, M. K. Morris, W. D. Taylor
Elusive Documents
No abstract provided.
Effects Of Grazing On Desert Vegetation, B. E. Norton, D. J. Bermant
Effects Of Grazing On Desert Vegetation, B. E. Norton, D. J. Bermant
Memorandum
No abstract provided.
The Impact Of Seed Consumers In A Desert Ecosystem: An Integrated Approach, W. G. Whitford
The Impact Of Seed Consumers In A Desert Ecosystem: An Integrated Approach, W. G. Whitford
Memorandum
No abstract provided.
Gas Exchange Of Sonoran Desert Plants, S. R. Szarek, R. M. Woodhouse
Gas Exchange Of Sonoran Desert Plants, S. R. Szarek, R. M. Woodhouse
Memorandum
No abstract provided.
Clustar And Clustid: Programs For Hierarchical Cluster Analysis, K. A. Marshall, H. C. Romesburg
Clustar And Clustid: Programs For Hierarchical Cluster Analysis, K. A. Marshall, H. C. Romesburg
Memorandum
No abstract provided.
Demography Of Termite Colonies As Related To Various Environmental Factors: Nutritional Biochemistry And Physiology Of Termites, W. L. Nutting, J. P. Lafage
Demography Of Termite Colonies As Related To Various Environmental Factors: Nutritional Biochemistry And Physiology Of Termites, W. L. Nutting, J. P. Lafage
Memorandum
No abstract provided.
Tucson Basin Validation Site Report, J. L. Thames
Rock Valley Validation Site Report, F. B. Turner
Rodent Seed-Foraging Strategies And Competition With Ants In The Sonoran Desert, J. H. Brown, D. W. Davidson
Rodent Seed-Foraging Strategies And Competition With Ants In The Sonoran Desert, J. H. Brown, D. W. Davidson
Memorandum
No abstract provided.
Comparison Of Biological Processes In Western Deserts, J. Skujins
Comparison Of Biological Processes In Western Deserts, J. Skujins
Memorandum
No abstract provided.
Interactions Of Winter Sheep Grazing And Small Mammal Populations, C. D. Jorgensen
Interactions Of Winter Sheep Grazing And Small Mammal Populations, C. D. Jorgensen
Memorandum
No abstract provided.
Plant Growth And Water Transfer Processes Under Desert Conditions, L. Gay, T. Sammis, D. D. Evans
Plant Growth And Water Transfer Processes Under Desert Conditions, L. Gay, T. Sammis, D. D. Evans
Memorandum
No abstract provided.
Demography Of Termite Colonies As Related To Various Environmental Factors: Nutritional Biochemistry And Physiology Of Termites, W. L. Nutting, J. P. Lafage
Demography Of Termite Colonies As Related To Various Environmental Factors: Nutritional Biochemistry And Physiology Of Termites, W. L. Nutting, J. P. Lafage
Memorandum
No abstract provided.
Effects Of Rodents On Germination Of Desert Annuals, O. J. Reichman
Effects Of Rodents On Germination Of Desert Annuals, O. J. Reichman
Memorandum
No abstract provided.
Nitrogen Cycling In Great Basin Desert Soils, J. Skujins, B. Klubek
Nitrogen Cycling In Great Basin Desert Soils, J. Skujins, B. Klubek
Memorandum
No abstract provided.
Plant Food Habits Of Rodents In Curlew Valley, E. L. Becker Ii, D. F. Balph, M. H. Balph
Plant Food Habits Of Rodents In Curlew Valley, E. L. Becker Ii, D. F. Balph, M. H. Balph
Memorandum
No abstract provided.
Jornada Validation Site Report, W. G. Whitford
Seed-Eating Birds, H. R. Pulliam
Responses And Interactions In Desert Plants As Influenced By Irrigation And Nitrogen Application, R. B. Hunter, E. M. Romney, A. Wallace, J. E. Kinnear, T. L. Ackerman, H. O. Hill
Responses And Interactions In Desert Plants As Influenced By Irrigation And Nitrogen Application, R. B. Hunter, E. M. Romney, A. Wallace, J. E. Kinnear, T. L. Ackerman, H. O. Hill
Memorandum
No abstract provided.
User's Manual For Desert2: A Desert Ecosystem Simulator Written In Ansi Fortran Iv, W. D. Valentine
User's Manual For Desert2: A Desert Ecosystem Simulator Written In Ansi Fortran Iv, W. D. Valentine
Memorandum
No abstract provided.
Deep Creek Validation Study Report, G. W. Minshall, C. Y. Manuel, R. W. Dunn, R. K. Pace, M. R. Mcsorley, D. A. Andrews
Deep Creek Validation Study Report, G. W. Minshall, C. Y. Manuel, R. W. Dunn, R. K. Pace, M. R. Mcsorley, D. A. Andrews
Memorandum
No abstract provided.
Primary Production And Carbon Allocation In Creosotebush: Validation Of The Model, G. L. Cunningham, J. F. Reynolds
Primary Production And Carbon Allocation In Creosotebush: Validation Of The Model, G. L. Cunningham, J. F. Reynolds
Memorandum
No abstract provided.
Cryptobiosis And Its Effect On Metabolism And Production Estimates Of Desert Nematodes, D. W. Freckman
Cryptobiosis And Its Effect On Metabolism And Production Estimates Of Desert Nematodes, D. W. Freckman
Memorandum
No abstract provided.
Impact Of Grazing On Foothill Vegetation, K. C. Hodgkinson, P. S. Johnson
Impact Of Grazing On Foothill Vegetation, K. C. Hodgkinson, P. S. Johnson
Memorandum
No abstract provided.
Nitrogen Transformation In Rock Valley And Adjacent Areas Of The Mohave Desert, R. B. Hunter, A. Wallace, E. M. Romney
Nitrogen Transformation In Rock Valley And Adjacent Areas Of The Mohave Desert, R. B. Hunter, A. Wallace, E. M. Romney
Memorandum
No abstract provided.
Biology Of Nematodes In Desert Ecosystems, R. Mankau
Plant Productivity And Nutrient Interrelationships Of Perennials In The Mohave Desert, A. Wallace, A. T. Vollmer, R. T. Mueller, J. W. Cha
Plant Productivity And Nutrient Interrelationships Of Perennials In The Mohave Desert, A. Wallace, A. T. Vollmer, R. T. Mueller, J. W. Cha
Memorandum
No abstract provided.
Pheasant Use Of Wetlands During The Winter And Application Of Landsat Imagery For Assessing Winter Habitat, Signe Sather-Blair
Pheasant Use Of Wetlands During The Winter And Application Of Landsat Imagery For Assessing Winter Habitat, Signe Sather-Blair
Electronic Theses and Dissertations
This study was designed to investigate 1) vegetative factors influencing ring-necked pheasant (Phasianus colchicus) use of wetlands during the winter, 2) the relationship of land use practices adjacent to wetlands and the use of such wetlands as winter cover by pheasants, and 3) the feasibility of assessing wetlands as pheasant winter habitat through the use of remote sensing data. Fifteen wetlands in Windsor Township, Brookings County, South Dakota, were randomly selected for study to estimate their use by pheasants. Use of cover types was analyzed by using multiple regression, chi-square, and t-tests. Correlation matrices were generated to locate significant relationships. …
Winter Limnological Conditions In A Prairie Pothole And The Application Of Molecular Oxygen, Richard A. Fike
Winter Limnological Conditions In A Prairie Pothole And The Application Of Molecular Oxygen, Richard A. Fike
Electronic Theses and Dissertations
The physical, chemical, and biological conditions in Round Lake, Oakwood Lakes State Park, South Dakota were monitored during the 1977-1978 winter, and reaeration utilizing molecular oxygen was evaluated as a practical method to prevent winterkill. Ice and snow conditions after 20 December, 1977 allowed little light penetration, and phytoplankton numbers (6174/ml to 1668/ml) and chlorophyll concentration (46.6 mg/L to 14.1 mg/L) decreased throughout the winter. Aquatic bacteria and fungi comprised from 87.0% to 93.7% by number of the total cells identified (phytoplankton, bacteria, and fungi) in the lake water under ice. Dissolved oxygen declined to anoxic conditions after 19 January, …
Nesting Chronology Of South Dakota Ducks, Stephen A. Tessmann
Nesting Chronology Of South Dakota Ducks, Stephen A. Tessmann
Electronic Theses and Dissertations
Duck broods were censused on 476 randomly selected plots in South Dakota during July of the years 1973 through 1976. Broods were also censused on wetlands located off the study plots both in July and August of these years, except in 1976 when no August counts were made. Hatching and nest initiation dates were determined by back dating from brood age classes. Early nesting species were mallards (Anas platyrhynchos) and pintails (A. acuta). Northern shovelers (A. clypeata), redheads (Aythya americana), and canvasbacks (A. valisineria) were intermediate nesters while blue-winged teal (Anas discors), gadwalls (A. strepera), and American wigeons (A. americana) …