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Articles 6421 - 6450 of 7340
Full-Text Articles in Physical Sciences and Mathematics
Abundance And Distribution Of Soil Microarthropods In Rock Valley, Nevada, E. B. Edney, J. F. Mcbrayer, P. J. Franco, A. W. Phillips
Abundance And Distribution Of Soil Microarthropods In Rock Valley, Nevada, E. B. Edney, J. F. Mcbrayer, P. J. Franco, A. W. Phillips
Memorandum
No abstract provided.
Seasonal Use Of Soil Moisture By Larrea Tridentata And Ambrosia Deltoidea, D. R. Cable
Seasonal Use Of Soil Moisture By Larrea Tridentata And Ambrosia Deltoidea, D. R. Cable
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.
Demographic Studies Of Sagebrush Insects As Functions Of Various Environmental Factors, T. H. Hsiao, A. K. Temte
Demographic Studies Of Sagebrush Insects As Functions Of Various Environmental Factors, T. H. Hsiao, A. K. Temte
Memorandum
No abstract provided.
Gas Exchange, Translocation, Root Growth And Soil Respiration Of Great Basin Plants, M. M. Caldwell, E. J. Depuit, O. A. Fernandez, H. H. Wiebe, L. B. Camp, R. S. Holthausen, H. Neuber
Gas Exchange, Translocation, Root Growth And Soil Respiration Of Great Basin Plants, M. M. Caldwell, E. J. Depuit, O. A. Fernandez, H. H. Wiebe, L. B. Camp, R. S. Holthausen, H. Neuber
Memorandum
No abstract provided.
Rodent Seed Foraging Strategies And Competition With Ants In The Sonoran Desert, J. H. Brown
Rodent Seed Foraging Strategies And Competition With Ants In The Sonoran Desert, J. H. Brown
Memorandum
No abstract provided.
Effects Of Temperature And Moisture On Productivity Of Oryzopsis Hymenoides, L. C. Pearson
Effects Of Temperature And Moisture On Productivity Of Oryzopsis Hymenoides, L. C. Pearson
Memorandum
No abstract provided.
Plant Productivity And Nutrient Interrelationships Of Perennials In The Mohave Desert, A. T. Vollmer, S. A. Bamberg, A. Wallace, J. W. Cha
Plant Productivity And Nutrient Interrelationships Of Perennials In The Mohave Desert, A. T. Vollmer, S. A. Bamberg, A. Wallace, J. W. Cha
Memorandum
No abstract provided.
Phenology And Function Of Sonoran Desert Annuals In Relation To Environmental Changes, D. T. Patten
Phenology And Function Of Sonoran Desert Annuals In Relation To Environmental Changes, D. T. Patten
Memorandum
No abstract provided.
Distribution And Balance Of Biomass And Nutrients In Desert Shrub Ecosystem, J. O. Klemmedson, R. C. Barth
Distribution And Balance Of Biomass And Nutrients In Desert Shrub Ecosystem, J. O. Klemmedson, R. C. Barth
Memorandum
No abstract provided.
Tucson Basin Validation Site Report, J. L. Thames
Nitrogen Retention In Cool Desert Soils, J. Skujins
Studies On Wood Borers, Girdlers And Seed Predators Of Mesquite, W. G. Whitford, R. K. Johnson, D. J. Depree
Studies On Wood Borers, Girdlers And Seed Predators Of Mesquite, W. G. Whitford, R. K. Johnson, D. J. Depree
Memorandum
No abstract provided.
Plant Response To Insect Herbivory, B. E. Norton, L. B. Smith
Plant Response To Insect Herbivory, B. E. Norton, L. B. Smith
Memorandum
No abstract provided.
Rock Valley Validation Site Report, F. B. Turner
Ecology Of Cool Desert Annuals, L. G. Klikoff, D. C. Freeman, N. Negus
Ecology Of Cool Desert Annuals, L. G. Klikoff, D. C. Freeman, N. Negus
Memorandum
No abstract provided.
Process Studies Related To The Deep Creek Ecosystem, C. W. Minshall, J. T. Brock, D. A. Mccullough, R. Dunn, M. R. Mcsorley, R. Pace
Process Studies Related To The Deep Creek Ecosystem, C. W. Minshall, J. T. Brock, D. A. Mccullough, R. Dunn, M. R. Mcsorley, R. Pace
Memorandum
No abstract provided.
Comparative Ecology Of The Harvester Ants Pogonomyrmex Barbatus (F. Smith) And Pogonomyrmex Rugosus (Emery), W. G. Whitford, P. Johnson, J. Ramirez
Comparative Ecology Of The Harvester Ants Pogonomyrmex Barbatus (F. Smith) And Pogonomyrmex Rugosus (Emery), W. G. Whitford, P. Johnson, J. Ramirez
Memorandum
No abstract provided.
Factors Contributing To Production And Distribution Of Chihuahuan Desert Annuals, P. D. Whitson
Factors Contributing To Production And Distribution Of Chihuahuan Desert Annuals, P. D. Whitson
Memorandum
No abstract provided.
Data Search For Aquatic Model, J. Perry Ii, G. W. Minshall
Data Search For Aquatic Model, J. Perry Ii, G. W. Minshall
Memorandum
No abstract provided.
Physiological And Biochemical Studies Of Nitrogen Fixation In The Nodules Of Sagebrush (Artemisia Ludoviciana) And Other Desert Nitrogen-Fixing Systems, R. B. Farnsworth
Physiological And Biochemical Studies Of Nitrogen Fixation In The Nodules Of Sagebrush (Artemisia Ludoviciana) And Other Desert Nitrogen-Fixing Systems, R. B. Farnsworth
Memorandum
No abstract provided.
The Effect Of The Gradient-Drift Term On Type I Electrojet Irregularities, D. T. Farley, Bela G. Fejer
The Effect Of The Gradient-Drift Term On Type I Electrojet Irregularities, D. T. Farley, Bela G. Fejer
Bela G. Fejer
We hypothesize that type 1 VHF radar echoes can only be observed when the electrojet plasma is linearly unstable at half the radar wavelength and that further, for reasons not yet understood, the phase velocity of the unstable waves always corresponds to the threshold conditions for instability, even when the destabilizing forces (electron drift and plasma density gradient) exceed the threshold. This phase velocity, which produces the Doppler shift of the radar echoes, is usually close to the ion acoustic velocity of the medium but can differ from it to some extent because of the effect of the density gradient. …
Vertical Structure Of The Vhf Backscattering Region In The Equatorial Electrojet And The Gradient Drift Instability, Bela G. Fejer, D. T. Farley, B. B. Balsley, R. F. Woodman
Vertical Structure Of The Vhf Backscattering Region In The Equatorial Electrojet And The Gradient Drift Instability, Bela G. Fejer, D. T. Farley, B. B. Balsley, R. F. Woodman
Bela G. Fejer
Radar measurements made with high spatial resolution and large dynamic range at the Jicamarca Radar Observatory near the time of reversal of the electrojet current provide further proof that the gradient drift instability is in fact responsible for the type 2 irregularities. Echoes are received over a much wider range of altitudes at night than during the day partly because of the change in character of the background electron density profile and partly because of recombination effects, which can be important during the day. It is also shown that one must be cautious, particularly at night, in associating the mean …
Oblique Vhf Spectral Studies Ofthe Equatorial Electrojet, Bela G. Fejer, D. T. Farley, B. B. Balsley, R. F. Woodman
Oblique Vhf Spectral Studies Ofthe Equatorial Electrojet, Bela G. Fejer, D. T. Farley, B. B. Balsley, R. F. Woodman
Bela G. Fejer
A new narrow-beam antenna at the Jicamarca Observatory permits oblique (zenith angle, 25°) radar spectral studies of the electrojet with an altitude resolution down to 1.1 km. Only daytime observations are possible presently, however. The general altitude variations in spectral shape observed are consistent with linear instability theory, if the effect of recombination is included. The height at which the mean Doppler shift of the echo maximizes, however, is about 4 km higher than one would expect on the basis of electrojet models. An increase in the assumed collision frequency would remove the discrepancy. Other data presented strongly suggest that …
Effects Of Grazing On Desert Vegetation, B. E. Norton
Effects Of Grazing On Desert Vegetation, B. E. Norton
Memorandum
No abstract provided.
Nitrogen Dynamics In Stands Dominated By Some Major Cool Desert Shrubs Iv. Inhibition By Plant Litter And Limiting Factors Of Several Processes, J. Skujins
Memorandum
No abstract provided.
Factors Affecting Seed Reserves In The Soil Of A Desert Ecosystem, R. M. Chew, J. F. Nelson
Factors Affecting Seed Reserves In The Soil Of A Desert Ecosystem, R. M. Chew, J. F. Nelson
Memorandum
No abstract provided.
Growth Of Perennials In Response To Varying Moisture And Defoliation Regimes, J. A. Macmahon, B. E. Norton, B. M. Capen
Growth Of Perennials In Response To Varying Moisture And Defoliation Regimes, J. A. Macmahon, B. E. Norton, B. M. Capen
Memorandum
No abstract provided.
Classification And Quantification Of Invertebrate Activity And The Role Of Invertebrates In Nitrogen Processing In Plants, Litter And Soil In Curlew Valley, P. R. Sferra
Progress reports
No abstract provided.
Demographic Studies Of Sagebrush Insects As Functions Of Various Environmental Factors, T. H. Hsiao, A. K. Temte
Demographic Studies Of Sagebrush Insects As Functions Of Various Environmental Factors, T. H. Hsiao, A. K. Temte
Progress reports
No abstract provided.