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Articles 289801 - 289830 of 302639
Full-Text Articles in Physical Sciences and Mathematics
1976 Field Crop Experiment, M. W. Perry
1976 Field Crop Experiment, M. W. Perry
Experimental Summaries - Plant Research
Performance of August sown cereals - 76MO50. To investigate the performance of late sown cereals for summer forage or grain in the eastern wheatbelt. This trial was designed to test the idea that even in a drought year, very late sowing of cereals might provide a low grain yield or at least a substantial quantity of summer feed.
1976 Growing Season Results Report, M L. Poole
1976 Growing Season Results Report, M L. Poole
Experimental Summaries - Plant Research
1. 76BU15 - Sunflower varieties x rates of seeding x times of seeding on Busselton Sand at Ruabon. 2. 76BU4 - Miscellaneous species x rates of H.23408 Treeton. 3. 76AL6 - Rape varieties under severe blackleg conditions. 4. CB49 - Seed softening methods and effort of harrowing on emergence. 76MA9 - Miscellaneous Crop Trial. CB49 Trials 76BA27 - Effect of Harrowing on germination. Fluctuating temperatures. Fate of Other Trials: 76AL35, 76AL37), 76AL38), 76AL39), 76DE4, 76JE28.
1976 Alternative Grain Legume Species Evaluation, G H. Walton
1976 Alternative Grain Legume Species Evaluation, G H. Walton
Experimental Summaries - Plant Research
l. Alternative species to Lupinus -76PE6, 76M11. 2. Time of Flowering Response of Cicer Arietinum to temperature and daylength.
Radar Observations Of Two Dimensional Turbulence In The Equatorial Electrojet, 2, Bela G. Fejer, D. T. Farley, B. B. Balsley, R. F. Woodman
Radar Observations Of Two Dimensional Turbulence In The Equatorial Electrojet, 2, Bela G. Fejer, D. T. Farley, B. B. Balsley, R. F. Woodman
Bela G. Fejer
Observations with an altitude resolution of about 1 km were made with the large, vertically directed 50-MHz radar system at the Jicamarca Radar Observatory during the day, when the electrojet was strong. Type 1 (‘two stream’) echoes were seen in a limited range of altitudes, with Doppler shifts corresponding to upward and downward motion at the acoustic velocity. Most of the radar returns were due to type 2 echoes, however. The direction of motion of the type 1 waves sometimes reversed in as little as 1 s, supporting a turbulent model of the electrojet region. During the day the upgoing …
Radar Measurements Of Neutral Winds And Temperatures In The Equatorial E Region, B. B. Balsley, Bela G. Fejer, D. T. Farley, R. F. Woodman
Radar Measurements Of Neutral Winds And Temperatures In The Equatorial E Region, B. B. Balsley, Bela G. Fejer, D. T. Farley, R. F. Woodman
Bela G. Fejer
The phase velocity of type 1 irregularities in the equatorial electrojet, which can be easily measured by radar, depends upon both the ion acoustic velocity (and hence the temperature) in the medium and the neutral wind velocity. By measuring the phase velocity at several zenith angles both of these quantities in principle can be determined. This note describes the technique and its limitations and presents a few preliminary results obtained at 50 MHz at the Jicamarca Radar Observatory in Peru. These results show E region east-west wind velocities as large as 100 m/s, temperature variations of greater than 100°K, and …
Radar Studies Of Anomalousvelocity Reversals In The Equatorial Ionosphere, Bela G. Fejer, D. T. Farley, B. B. Balsley, R. F. Woodman
Radar Studies Of Anomalousvelocity Reversals In The Equatorial Ionosphere, Bela G. Fejer, D. T. Farley, B. B. Balsley, R. F. Woodman
Bela G. Fejer
Radar observations made at Jicamarca show that the equatorial electrojet current and the E and F region electric fields can reverse from their normal direction during the day or night and during magnetically quiet or disturbed conditions. The nighttime reversals can only be detected by such radar measurements. The observations support most of the current hypotheses concerning the electrojet plasma instabilities. The rapid reversals sometimes seen during disturbed conditions indicate that high-latitude currents and electric fields associated with substorm activity strongly perturb the dynamo current system at all latitudes.
An Evaluation Of The Effects Of Dredging Within The Arkansas River Navigation System: Volume I - Introduction, Summary And Conclusions, And Recommendations, Myra Mcnutt, T. M. Buchanan, L. R. Kraemer, R. L. Meyer, E. H. Schmitz
An Evaluation Of The Effects Of Dredging Within The Arkansas River Navigation System: Volume I - Introduction, Summary And Conclusions, And Recommendations, Myra Mcnutt, T. M. Buchanan, L. R. Kraemer, R. L. Meyer, E. H. Schmitz
Technical Reports
The Arkansas River originates in the eastern slopes of the Rocky Mountains near Leadville, Colorado, and extends through Kansas, Oklahoma, and Arkansas, where it flows into the Mississippi River. The Arkansas River is approximately 1,450 miles in length and drains a total area of 160,500 square miles. The river and its tributaries have been developed for navigation, flood control, and hydro-electric power, as well as recreational purposes under the River and Harbor Act of July 24, 1946. The development of the Arkansas River for recreational use will be completed in the near future. The McClellan-Kerr Arkansas River Navigation System was …
Iowa Academy Of Science Leadership Directory, 1976-77, Iowa Academy Of Science
Iowa Academy Of Science Leadership Directory, 1976-77, Iowa Academy Of Science
Iowa Academy of Science Documents
Table of Contents:
Officers and Directors ... 2
Section Chairpersons ... 3
Standing Committees ... 6
Special Committee ... 14
Methane Distribution And Production In The Georgia Salt Marsh, Larry P. Atkinson, John R. Hall
Methane Distribution And Production In The Georgia Salt Marsh, Larry P. Atkinson, John R. Hall
CCPO Publications
Bacterial action in the anaerobic sediments of Spartina salt marsh produce large quantities of methane. Water in contact with the marsh has methane concentrations 200-300 times normal oceanic concentrations. The methane content of the water varies from maximum of 1.2 mu l CH sub(4)/ super(l) super(-1) in the summer to a minimum of 0.005 mu l CHl1
Decomposition And Mineralization In An Artemisia Tridentata Community In Northern Nevada, P. L. Comanor
Decomposition And Mineralization In An Artemisia Tridentata Community In Northern Nevada, P. L. Comanor
Memorandum
No abstract provided.
Plant Productivity And Nutrient Interrelationships Of Perennials In The Mohave Desert, A. T. Vollmer, A. Wallace, J. W. Cha, T. Hartsock
Plant Productivity And Nutrient Interrelationships Of Perennials In The Mohave Desert, A. T. Vollmer, A. Wallace, J. W. Cha, T. Hartsock
Memorandum
No abstract provided.
Primary Production And Carbon Allocation In Creosotebush: The Effect Of Leaf Age On Net Gas Exchange Capacity, J.P. Syvertsen, G.L. Cunningham
Primary Production And Carbon Allocation In Creosotebush: The Effect Of Leaf Age On Net Gas Exchange Capacity, J.P. Syvertsen, G.L. Cunningham
Memorandum
No abstract provided.
Plant Demographic Studies Of Desert Annual Communities In Northern Utah Dominated By Non-Native Weedy Species, D.R. Duba, B.E. Norton
Plant Demographic Studies Of Desert Annual Communities In Northern Utah Dominated By Non-Native Weedy Species, D.R. Duba, B.E. Norton
Memorandum
No abstract provided.
Distribution Of Microorganisms In Desert Soil, A. T. Vollmer, F. Au, S. A. Samberg
Distribution Of Microorganisms In Desert Soil, A. T. Vollmer, F. Au, S. A. Samberg
Progress reports
No abstract provided.
Decomposition And Mineralization In An Artemisia Tridentata Community In Northern Nevada, P. L. Comanor
Decomposition And Mineralization In An Artemisia Tridentata Community In Northern Nevada, P. L. Comanor
Progress reports
No abstract provided.
Measurements Of Carbon And Nitrogen Changes In A Desert Soil, E. E. Staffeldt, K. B. Vogt
Measurements Of Carbon And Nitrogen Changes In A Desert Soil, E. E. Staffeldt, K. B. Vogt
Progress reports
No abstract provided.
Evaluation Of Critical Soil Properties Needed To Predict Soil Water Flow Under Desert Conditions, W. A. Jury, L. H. Stolzy, J. Letey Jr., L. V. Weeks
Evaluation Of Critical Soil Properties Needed To Predict Soil Water Flow Under Desert Conditions, W. A. Jury, L. H. Stolzy, J. Letey Jr., L. V. Weeks
Progress reports
No abstract provided.
Programming Phase Of Water Response Ecosystem Model: Ii. Abiotic Submodels, P. W. Lommen, K. A. Marshall
Programming Phase Of Water Response Ecosystem Model: Ii. Abiotic Submodels, P. W. Lommen, K. A. Marshall
Progress reports
No abstract provided.
Gas Exchange, Translocation, Root Growth And Soil Respiration Of Great Basin Plants, M.M. Caldwell, L.B. Camp, R.S. Holthausen, H. Nueber
Gas Exchange, Translocation, Root Growth And Soil Respiration Of Great Basin Plants, M.M. Caldwell, L.B. Camp, R.S. Holthausen, H. Nueber
Progress reports
No abstract provided.
Nitrogen Retention In Cool Desert Soils, J. J. Skujins
Nitrogen Retention In Cool Desert Soils, J. J. Skujins
Progress reports
No abstract provided.
Programming Phase Of Water Response Ecosystem Model: I. Introduction And Support Programs, P. W. Lommen
Programming Phase Of Water Response Ecosystem Model: I. Introduction And Support Programs, P. W. Lommen
Progress reports
No abstract provided.
Programming Phase Of Water Response Ecosystem Model Iii. Animal Submodel, J. E. Heasley
Programming Phase Of Water Response Ecosystem Model Iii. Animal Submodel, J. E. Heasley
Progress reports
No abstract provided.
Programming Phase Of Water Response Ecosystem Model: Iv. Perennial Plant, Nitrogen And Decomposition Submodels, P. W. Lommen, D. C. Wilkin
Programming Phase Of Water Response Ecosystem Model: Iv. Perennial Plant, Nitrogen And Decomposition Submodels, P. W. Lommen, D. C. Wilkin
Progress reports
No abstract provided.
Nitrogen Transformations In Rock Valley And Adjacent Areas Of The Mohave Desert, R. B. Hunger, A. Wallace, E. M. Romney
Nitrogen Transformations In Rock Valley And Adjacent Areas Of The Mohave Desert, R. B. Hunger, A. Wallace, E. M. Romney
Progress reports
No abstract provided.
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
Progress reports
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
Progress reports
No abstract provided.
Predicción De Terremotos: ¿Cuándo?, Aldemaro Romero Jr.
Predicción De Terremotos: ¿Cuándo?, Aldemaro Romero Jr.
Publications and Research
No abstract provided.
Test 1201: Ford 5600 Diesel 8-Speed, Nebraska Tractor Test Lab
Test 1201: Ford 5600 Diesel 8-Speed, Nebraska Tractor Test Lab
Nebraska Tractor Tests
EXPLANATION OF TEST REPORT GENERAL CONDITIONS Each tractor is a production model equipped for common usage. Power consuming accessories may be disconnected only when the means for disconnecting can be reached from the operator station. Additional weight can be added as ballast if the manufacturer regularly supplies it for sale. The static tire loads and the inflation pressures must conform to recommendations in the Tire Standards published by the Society of Automotive Engineers. PREPARATION FOR PERFORMANCE RUNS The engine crankcase is drained and refilled with a measured amount of new oil conforming to specifications in the operator’s manual. The fuel …
Test 1202: Ford 4100 Diesel 8-Speed, Nebraska Tractor Test Lab
Test 1202: Ford 4100 Diesel 8-Speed, Nebraska Tractor Test Lab
Nebraska Tractor Tests
EXPLANATION OF TEST REPORT GENERAL CONDITIONS Each tractor is a production model equipped for common usage. Power consuming accessories may be disconnected only when the means for disconnecting can be reached from the operator station. Additional weight can be added as ballast if the manufacturer regularly supplies it for sale. The static tire loads and the inflation pressures must conform to recommendations in the Tire Standards published by the Society of Automotive Engineers. PREPARATION FOR PERFORMANCE RUNS The engine crankcase is drained and refilled with a measured amount of new oil conforming to specifications in the operator’s manual. The fuel …
Test 1203: Ford 3600 Diesel 6-Speed, Nebraska Tractor Test Lab
Test 1203: Ford 3600 Diesel 6-Speed, Nebraska Tractor Test Lab
Nebraska Tractor Tests
EXPLANATION OF TEST REPORT GENERAL CONDITIONS Each tractor is a production model equipped for common usage. Power consuming accessories may be disconnected only when the means for disconnecting can be reached from the operator station. Additional weight can be added as ballast if the manufacturer regularly supplies it for sale. The static tire loads and the inflation pressures must conform to recommendations in the Tire Standards published by the Society of Automotive Engineers. PREPARATION FOR PERFORMANCE RUNS The engine crankcase is drained and refilled with a measured amount of new oil conforming to specifications in the operator’s manual. The fuel …