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Articles 8881 - 8910 of 9279
Full-Text Articles in Earth Sciences
Seed Reserves Of Desert Soils, Stuart Childs, David W. Goodall
Seed Reserves Of Desert Soils, Stuart Childs, David W. Goodall
Memorandum
No abstract provided.
Distillation-Condensation Of Water And Nutrient Movement In A Desert Ecosystem, N. Stark
Distillation-Condensation Of Water And Nutrient Movement In A Desert Ecosystem, N. Stark
Memorandum
No abstract provided.
Decomposition And Mineralization In An Artemisia Tridentata Community In Northern Nevada, P. L. Comanor, D. C. Prusso
Decomposition And Mineralization In An Artemisia Tridentata Community In Northern Nevada, P. L. Comanor, D. C. Prusso
Memorandum
No abstract provided.
Proteolytic Activity Of Soil Microorganisms, Robert T. O'Brien
Proteolytic Activity Of Soil Microorganisms, Robert T. O'Brien
Memorandum
No abstract provided.
Chemical Quality Of The Groundwater System In Hall County, Nebraska, Jon C. Atkinson
Chemical Quality Of The Groundwater System In Hall County, Nebraska, Jon C. Atkinson
Department of Earth and Atmospheric Sciences: Dissertations, Theses, and Student Research
Hall County, an area of 540 square miles, is in south-central Nebraska. The Platte River flows east-northeasterly across the county from its southwest corner; the Wood River, which is tributary to the Platte within Hall County, enters the county about 6 miles north of the southwest corner. Analysis of streamflow data indicates that the Platte and Wood Rivers are losing streams in Hall County. Based on an 18-year period, October 1953 through September 1971, the average annual losses between gaging stations were 48,100 and 1,940 acre-feet, respectively.
The county is underlain by unconsolidated deposits of Quaternary age. These deposits mantle …
Bromegrass Productivity In Relation To Precipitation, Shrub Canopy Cover And Soil Nitrogen Content, Lawrence G. Kline
Bromegrass Productivity In Relation To Precipitation, Shrub Canopy Cover And Soil Nitrogen Content, Lawrence G. Kline
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
In seasons of above normal precipitation, populations of annual weedy species increase in great abundance in semi-arid desert plant communities. These increases in biomass tie up a considerable portion of the available nitrogen of such ecosystems and may depress subsequent annual grass germination.
A big sagebrush-annual bromegrass plant community was irrigated to simulate a spring growth period of abundant precipitation amenable to annual bromegras s productivity. Productivity and nitrogen content parameters were monitored throughout the spring and summer to evaluate the short and potential long term effects of this seasonal increase in "precipitation".
Irrigation increased annual bromegrass productivity almost 50 …
Demographic Studies Of Sagebrush Insects As Functions Of Various Environmental Factors, T. H. Hsiao, R. L. Kirkland
Demographic Studies Of Sagebrush Insects As Functions Of Various Environmental Factors, T. H. Hsiao, R. L. Kirkland
Memorandum
No abstract provided.
Distribution Of Mictroorganisms In Desert Soil, A.T. Vollmer, F. Au, S.A. Bamberg
Distribution Of Mictroorganisms In Desert Soil, A.T. Vollmer, F. Au, S.A. Bamberg
Memorandum
No abstract provided.
Terrestrial Models: Soil Processes (Versions I, Ii, Iii), J. Radford
Terrestrial Models: Soil Processes (Versions I, Ii, Iii), J. Radford
Memorandum
No abstract provided.
Gaseous Losses Of Nitrogen From The Soil Of Semi-Arid Regions, T.C. Tucker, R.L. Westerman
Gaseous Losses Of Nitrogen From The Soil Of Semi-Arid Regions, T.C. Tucker, R.L. Westerman
Memorandum
No abstract provided.
Population Studies Of The Desert Cottontail (Sylvilagus Auduboni) And Black-Tailed Jackrabbit (Lepus Californicus) In The Sonoran Desert, C.R. Hungerford, C.H. Lowe, R.L. Madsen
Population Studies Of The Desert Cottontail (Sylvilagus Auduboni) And Black-Tailed Jackrabbit (Lepus Californicus) In The Sonoran Desert, C.R. Hungerford, C.H. Lowe, R.L. Madsen
Memorandum
No abstract provided.
The Role Of Algae In Crust Formation And Nitrogen Cycling In Desert Soils, R I. Lynn, R E. Cameron
The Role Of Algae In Crust Formation And Nitrogen Cycling In Desert Soils, R I. Lynn, R E. Cameron
Memorandum
No abstract provided.
Special Purpose Models, D. Wilkin
Evaluation Of Critical Soil Properties Needed To Predict Soil Water Flow Under Desert Conditions, J Letey Jr, G R. Mehuys, L V. Weeks
Evaluation Of Critical Soil Properties Needed To Predict Soil Water Flow Under Desert Conditions, J Letey Jr, G R. Mehuys, L V. Weeks
Memorandum
No abstract provided.
Broad Spectrum Microwave Systems For Remotely Measuring Soil Moisture Content, W. P. Waite, K. R. Cook, B. B. Bryan
Broad Spectrum Microwave Systems For Remotely Measuring Soil Moisture Content, W. P. Waite, K. R. Cook, B. B. Bryan
Arkansas Water Resources Center Technical Reports
A theoretical and experimental study of the microwave reflectivity of soils with varying moisture content was conducted. A system was developed to measure reflectivity over a continuous frequency range of 4 to 26.5 GHz, at incidence angles from 10° to 70°, and with both horizontal and vertical polarization. The measurements were found to be extremely accurate for smooth homogeneous surfaces, however, the effects of surface roughness were found to be more severe than predicted due to the discontinuous nature of naturally occurring rough surfaces. An algorithm was developed which used the frequency dependence of the reflectivity to estimate the effective …
Pine Valley Validation Site, C.D. Jorgensen, G. Richins
Pine Valley Validation Site, C.D. Jorgensen, G. Richins
Memorandum
No abstract provided.
Evaluation Of Critical Soil Properties Needed To Predict Soil Water Flow Under Desert Conditions, G. R. Mehuys, L. H. Stolzy, J. Letey Jr., L. V. Weeks
Evaluation Of Critical Soil Properties Needed To Predict Soil Water Flow Under Desert Conditions, G. R. Mehuys, L. H. Stolzy, J. Letey Jr., L. V. Weeks
Memorandum
No abstract provided.
Annual Nutrient And Energy Intake Of The Desert Cottontail, Sylvilagus Auduboni, Under Natural Conditions, H G. Reynolds, F. J. Turkowski, R. M. Chew
Annual Nutrient And Energy Intake Of The Desert Cottontail, Sylvilagus Auduboni, Under Natural Conditions, H G. Reynolds, F. J. Turkowski, R. M. Chew
Memorandum
No abstract provided.
Reproduction And Survivorship Of The Lizard, Uta Stansburiana, And The Effects Of Winter Rainfall, Density And Predation On These Processes, F. B. Turner, P. A. Medica, D. D. Smith
Reproduction And Survivorship Of The Lizard, Uta Stansburiana, And The Effects Of Winter Rainfall, Density And Predation On These Processes, F. B. Turner, P. A. Medica, D. D. Smith
Memorandum
No abstract provided.
Jornada Validation Site Report, Walter G. Whitford
Consumption Of Larrea By Chewing Insects, F. G. Werner, A. R. Olsen
Consumption Of Larrea By Chewing Insects, F. G. Werner, A. R. Olsen
Memorandum
No abstract provided.
Tucson Validation Sites Report, John L. Thames
Rock Valley Validation Site Report, Frederick B. Turner
Rock Valley Validation Site Report, Frederick B. Turner
Memorandum
No abstract provided.
Density And Dietary Habits Of Pocket Gophers (Thomomy Bottae Centralie) In Rock Valley, R. E. Dingman, James Bandoli
Density And Dietary Habits Of Pocket Gophers (Thomomy Bottae Centralie) In Rock Valley, R. E. Dingman, James Bandoli
Memorandum
No abstract provided.
Natural Activity Patterns And Thermal Experience In Dipodomys Merriani, W. O. Wirtz, D. V. Brown
Natural Activity Patterns And Thermal Experience In Dipodomys Merriani, W. O. Wirtz, D. V. Brown
Memorandum
No abstract provided.
Effect Of Density On The Population Dynamics Of Perognathus Formosus And Its Relationships Within A Desert Ecosystem, R. M. Chew, F. B. Turner, Peter August, Bernardo Maza, James Nelson
Effect Of Density On The Population Dynamics Of Perognathus Formosus And Its Relationships Within A Desert Ecosystem, R. M. Chew, F. B. Turner, Peter August, Bernardo Maza, James Nelson
Memorandum
No abstract provided.
Role Of Annual Grasses And Shrubs In Nutrient Cycling Of Great Basin Communites, L. G. Kline, C. M. Mckell
Role Of Annual Grasses And Shrubs In Nutrient Cycling Of Great Basin Communites, L. G. Kline, C. M. Mckell
Memorandum
No abstract provided.
Growth And Development Of Sitanion Hystrix And Poa Sandbergii, M. Hironaka, E. W. Tisdale
Growth And Development Of Sitanion Hystrix And Poa Sandbergii, M. Hironaka, E. W. Tisdale
Memorandum
No abstract provided.
Model Of Net Co2 Exchange Rate For C-4 Grasses, G. L. Cunningham, F. R. Balding, J. P. Syvertsen
Model Of Net Co2 Exchange Rate For C-4 Grasses, G. L. Cunningham, F. R. Balding, J. P. Syvertsen
Memorandum
No abstract provided.
Phenology And Function Of Sonoran Desert Annuals In Relation To Environmental Changes, D. T. Patten, E. M. Smith
Phenology And Function Of Sonoran Desert Annuals In Relation To Environmental Changes, D. T. Patten, E. M. Smith
Memorandum
No abstract provided.