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Changing Fields: Agricultural Land Use Changes In Nebraska 1925-1974, Donald A. Wilhite

National Drought Mitigation Center: Faculty Publications

The series of graphs and maps which follow illustrate agricultural land use changes in Nebraska from 1925 to 1974. With these graphs and maps, the major agronomic crops of corn (dryland and irrigated), wheat, sorghum and soybeans are analyzed. The purpose of this analysis is to provide a pictorial history of Nebraska's ever-changing cropping system and, hopefully, to stimulate ideas and discussion with regard to trends and future directions. The Nebraska Water Resources Center is deeply interested in both the past and the future of Nebraska's agriculture because of the demands which agriculture places on the state's water resources. An …

Some Trends In Forecast Skill At The National Severe Storms Forecast Center, Allen Pearson, Steven J. Weiss

United States Geological Survey: Staff Publications

Tornado watch and severe local storm outlook verification statistics reveal the trends in forecast skill at the National Severe Storms Forecast Center. The skill level of the outlook has been steadily increasing since 1973. The percentage of watches verifying has been gradually increasing since 1970. While the probability of detection for tornadoes has decreased slightly since 1974, this appears to be highly correlated with the number of outbreak tornadoes reported in a given year. During significant tornado days, a much higher degree of skill is exhibited for both outlooks and watches. Factors influencing the results are discussed, including the impact …

Production Of A Population Of The Stout Razor Clam (Tagelus Plebeius Solander) In A Virginia Estuary, Mark James Grussendorf

OES Theses and Dissertations

The annual net secondary production of the stout razor clam, Tagelous plebeius, was estimated at three sites on an intertidal sand flat at Lynnhaven Inlet, Virginia. Samples were taken at six week intervals for one year. The range of net production (P), mean annual biomass (B), and P/B ratios was 18.3-28.7 g m^-2year^-1, 27.2-53.3 g m^-2, and 0.54-0.67, respectively. The total biomass did not show significant seasonal variation though differences between sites were significant. Production varied temporally but was not significantly different between sites.

Turbulence Spectra In A Well-Mixed Estuary, Jong Yul Chung

OES Theses and Dissertations

This dissertation is an attempt to determine and describe some of the turbulent process in a well-mixed estuary. The processes are identified by the study of turbulent velocity fluctuations. These velocity records have been analyzed using standard digital methods to obtain spectral density, spectral energy, and cross-spectra of velocity. In order to study the generation and transfer of the turbulent moment and energy, and the intermittent nature of the so-called "Bursting or "ejections and sweeps," the distribution of u, v, w, and the Reynolds stress has been studied.

Volume 3, Number 3 (March 1979), The Otec Liaison

The OTEC Liaison

No abstract provided.

Volume 3, Number 2 (February 1979), The Otec Liaison

The OTEC Liaison

No abstract provided.

Lake Mead And Lake Powell Salinity Reports, Cathy Lee, Steve Gazafy

Publications (WR)

The enclosed reports were compiled for the Colorado River Water Quality Office based on salinity data for Lake Mead and Lake Powell. According to the regional director of the office, the reports are not considered "polished" documents for public distribution. However, he considers them to be "interesting, rough appraisals of general trends that may be very important In our understanding the hydro-salinity system in the Colorado River."

A Study Of Vertical And Horizontal Visibility Relationships Under Water, Jean J. Mccarthy

Journal of the Minnesota Academy of Science

A threefold study was undertaken to:

1) determine the nature of the mathematical relationship between vertical and horizontal visibility underwater

2) examine the feasibility of using the Secchi disc method to measure horizontal visibility in the photic zone;

3) obtain descriptive data on vertical and horizontal visibility in selected lakes of southern Minnesota.

The Secchi disc technique for measuring· visibility was modified to accommodate horizontal readings, and data were col1lected from 12 lakes at 5, 15 and 25 feet depths under controlled conditions. Reliability correlations were significant (p ( .01) and ranged from .764 to .994. Correlations and regression equations …

An Analysis Of The U.S.-Canadian East Coast Fisheries Resource Agreement, Michael V. Guimond

Marine Affairs Theses and Major Papers

This analysis of the U.S.-Canadian East Coast Fisheries Resource Agreement was initiated at the request of a group of fishing industry representatives concerned about some of the terms enumerated in this document. The purpose behind this research project was threefold. First, to determine if this Agreement was consistent with the intent of the FCMA. Second, to determine the economic impact of this Treaty upon the New England fishing industry. The third purpose, which is not in the scope of this paper, was to aid in determining what the response of the user groups should be.

Impact Of The Ussr's 200 Mile Fishery Zone On The Japanese-Soviet Fishery Negotiations, Hiroshi Hara

Marine Affairs Theses and Major Papers

The current negotiations between Japan and the Soviet Union on the amount of catch by Japanese within the Soviet Union's 200-mile zone and by the Soviet Union within the Japanese 200-mile zone are very complex. When the Soviets declared their 200-mile zone, Japan did not agree to Soviet fishing jurisdiction over the 200-mile zone surrounding these islands. In order to secure its traditional interests in fishing within the extensive 200-mile lines, including the disputed islands, Japan had to agree to the Soviet lines with a proviso that territorial questions would be separated from fishing rights. This thesis examines the recent …

Maritime Unions & U.S. Shipping Policy, Jon Lucas

Marine Affairs Theses and Major Papers

This paper explores the role played by the U.S. maritime unions in influencing the formation of American shipping policy. The thesis of the paper is that maritime unions have exerted great influence on legislators, through lobbying efforts to foster special-interest legislation which benefits union members at the expense of the taxpayer. The research is based on standard works on shipping and maritime labor relations, Hearings of the House and Senate Merchant Marine committees, and newspaper and magazine articles which trace the progress of various pieces of maritime legislation. Only the activities of the seagoing unions are discussed, and the paper …

A Proposal For The Establishment Of A Monthly Latin American Fisheries Newspaper, Kenneth Proudfoot

Marine Affairs Theses and Major Papers

At the present time there does not exist any publication or other communication medium, directed specifically to a Latin American readership, that reports thoroughly and accurately on the fisheries and other marine-related developments in Latin America. Problems of language, physical size of the area, financing, personnel, bureaucracy and politics, among others, have always proved to be overwhelming. This study describes the informational needs of the people and organizations concerned with Latin America's fisheries sector, and review current fisheries and marine-related publications in this region. a preliminary economic feasibility analysis for the creation and publication of a new monthly Latin American …

Management Of Antarctic Krill, Paul Setliff

Marine Affairs Theses and Major Papers

This study pertains to the problem of international activity in an area of political and ecological sensitivity, the Southern Ocean. Of specific concern is the question of which group of states should have a voice in management of Antarctic krill. The niche filled by krill within the ecosystem and its potential as a fishery is discussed. Past international practice has been affected for the most part by the Antarctic Treaty of 1959 which has maintained a somewhat exclusive "club" of nations as the overseers of Antarctic activity. However, states not party to the 1959 Treaty are becoming interested in the …

State Government And Ocs Policy: An Analysis Of The Outer Continental Shelf Lands Act And The Amendments Of 1978, Bruce Vild

Marine Affairs Theses and Major Papers

An Energy Research and Development Administration report indicates that the United States is increasing its dependence on oil from the countries that participated in the 1973 oil embargo. Given the volatile situation in the Middle East at this writing, the Carter Administration's peace initiatives notwithstanding, this seems an imprudent policy. And, at a time when "Project Independence" is a recent memory, there is a great deal of irony in increased importation. It seems in the Nation's best interest to reverse that trend. Natural gas is also in demand, of course, especially in the Northeast during the winter. The best solution …

A Preliminary Cost-Benefit Analysis Of The Proposed St. Thomas-St. John Sand Mining Project, Random Dubois

Marine Affairs Theses and Major Papers

A territorial ban on beach and sand removal in the U. S. Virgin Islands has resulted in a search for alternative sources. Insecure extra-territorial reserves and high shipping costs have made sand importation prohibitive. Recent surveys conducted in 1977 by the U. S. Geological Survey identified several nearshore sources of aggregate adjacent to the island of St. Thomas. In a 1978 workshop jointly conducted by the Government of the Virgin Islands and the National Oceanic and Atmospheric Administration various alternatives were presented for sand extraction. Two alternatives are examined using a cost benefit approach.

Volume 3, Number 1 (January 1979), The Otec Liaison

The OTEC Liaison

No abstract provided.

Turbulence Spectra Above A Vegetated Surface Under Conditions Of Sensible Heat Advection, Raymond P. Motha, Shashi B. Verma, Norman J. Rosenberg

National Drought Mitigation Center: Faculty Publications

Spectra of vertical and horizontal velocity, air temperature and humidity fluctuations were analyzed from measurements made over a well-watered alfalfa crop under conditions of sensible heat advection. Vertical velocity and air temperature spectra as well as cospectra of momentum, sensible heat and water vapor were found to be dependent on atmospheric thermal stratification. These spectra and cospectra were shifted toward higher frequencies under advective as compared to lapse conditions. These results indicate that the predominant eddy sizes are relatively smaller under advective conditions. Humidity spectra, on the other hand, were independent of daytime thermal stratification conditions but were influenced by …

1979 Field Crops Experiments, P. Mcr. Wood

Experimental Summaries - Plant Research

Field crops experiments resistance of lupins to Phomopsis leptostromiformis. (P.McR. Wood, Plant Research Division, J. Hamblin, Plant Production Division). Stage 1-2 Plant Breeders' Plots. Phomopsis infection of 96 entries (replicated) was assessed just prior to harvest at seven sites - Chapman Valley Research Station (CVRS), Badgingarra Research Station (BRS), Wongan Hills Research Station (WHRS), Avondale Research Station (ARS), Mount Barker Research Station (MBRS), Esperance Downs Research Station (EDRS) and on a farmer's property at Eradu. At four sites, CVRS, Eradu, MBRS and EDRS, only very low levels of infection were apparent. At the other three sites, the currently available varieties …

1979 Lupin Agronomy And Grain Legume Crop Evaluation, G H. Walton

Experimental Summaries - Plant Research

Yield Response to lupin density - 79BA44. Legume species herbicide tolerance - 79BA45. Yield response to weed component in field pea. - 79B3. Grain legume species comparison - 79BR2. Cereal - lupin mixtures for grain production - 79BR3. Soybean variety comparison - 79BY15. Grain legume species comparison - 79ES2, 79ES3, 79GE3, 79JE1. Lupin cultivar comparison - 79MO5. Legume species herbicide tolerance - 79MT19. Yield response to lupin density - 79MT47. Yield response to Field pea crop density - 79NA1, 79NA2. Field pea and vetch variety trial - 79NA3. Grain legume species comparison - 79NO3. Yield response to lupin density, +/- …

Uranium Transport In The Walker River Basin, California And Nevada, Larry Benson, D. L. Leach

United States Geological Survey: Staff Publications

During the summer of 1976 waters from tributaries, rivers, springs and wells were sampled in the Walker River Basin. Snow and sediments from selected sites were also sampled. All samples were analyzed for uranium and other elements. The resulting data provide an understanding of the transport of uranium within a closed hydrologic basin as well as providing a basis for the design of geochemical reconnaissance studies for the Basin and Range Province of the Western United States. Spring and tributary data are useful in locating areas containing anomalous concentrations of uranium. However, agricultural practices obscure the presence of known uranium …

Summary Of Experimental Results 1979, M J. Barbetti

Experimental Summaries - Plant Research

BLACKLEG DISEASE OF RAPESEED CONTROL OF SEEDLING INFECTION To test the effectiveness of the fungicides RH-2161.EC and thiabendazole in controlling blackleg seedling infection in rapeseed. Mt. Barker Research Station (79MT21) FUNGICIDAL CONTROL OF LOOSE SMUT IN BARLEY To test the effectiveness of four fungicides in controlling two levels of loose smut seed infection, and to examine the relationship between the level of smut seed infection and the subsequent crop infection levels. Albany (79AL19); Narrogin (79NA14) LOOSE SMUT OF BARLEY METHODS OF PICKLE APPLICATION FOR CONTROL OF LOOSE SMUT IN BARLEY To test the effectiveness of various methods of pickle application …

Timing And Rate Of Fungicides For Septoria Control, A G. Brown

Experimental Summaries - Plant Research

Fungicides on early sown crops 79A11 Avondale 79BA29 Badgingarra 79C11 Chapman 79E19 Esperance 79WH33 Wongan hills 79MT29 Mt. Barker 79KA19 Woodanilling Effect of fungicide on early sown wheat crops 79AL24 Chillinup 79JE7 Jerramungup 79M029a Moora 79M029b w. Dandaragan 79NO4 Bolgup

Summary Of Experimental Results 1979 General Phosphorous Trials, J W. Bowden, R Lunt, K F. Longbottom

Experimental Summaries - Plant Research

Contiuing trials Stock rate and level of Superhosphate on cyprus medic pasture 66M30 Rates of phosphorus, sulphur and stocking trial - cropping phase 68BR7 Maintenance P x S trials 65N5, 69WH15, 65A1, 65c6 Residual Value of Phosphorus 78M08, 78C4, 78MA2, 75LG26, 78M38 NEW TRIALS Crops N x P Trials 79NA11, 79NA12, 79NA13 Times of P on Lupins 79M030 Lupin and Oat Mixtures 79BA31, 79MT30 Methods Application and Cultivation of P on Wheat 79M1, 79WH1 Methods and Times of P on Wheat Old Land 79N1 Rates of Super on Wheat 79LG Rates of Super on Lupins 79GE PASTURES Rates of P, …

Summary Of Experimental Results 1979, W. J. Cox

Experimental Summaries - Plant Research

79N3 Nutrient Spray application on wheat - Newdegate Research Station, Paddock 1EB 79BA3 Nutrient Spray application on wheat - Badgingarra Research Station 79MT1 Nutrient spray application on wheat and lupins - Mt Barker Research Station, Paddock N1B 79LG1 Rates of Potassium on wheat - Riverton Estate, Walyurin 79ME1 Rates of Potassium on wheat - Koorda 79GE1 Rates of Potassium on wheat - Irwin 78GE5 Rates, times and sources of K residual - Irwin 79MO2 Phosphorous and potassium requirement of wheat and lupins 79TS1 Definition of Wodgil soil problem - clover - Perenjori 79GE10 Lime and molybdenum on wheat, sub clover …

Experimental Summary 1979, M W. Perry

Experimental Summaries - Plant Research

1. Variety x time of planting x Septoria control - Wheat 79MT5, 79BA7*, 79KA8*. 2. Wheat potential yield trials 79KA17, 79KA8* .Reported separately. 3. Yield analysis of historically important wheats 79M4, 79M5, 79WH8, 79WH14, 79A3. 4. Cereal seeding rates 79ME4, 79KA7*, 79MT4*. 5. Miscellaneous crop trials = high rainfall 79BR4, 79MA4, 79MA5. 6. Cycocel trials 79MT6, 79MT7, 79GE30, 79M09, 79M010*, 79GE4. 7. Oat Genotype x Time of Planting 79MT3. 8. Lupinus cosentinii regeneration trials 79GE38, 79GE42, 79GE43. * Results not yet available. Other trials Wheats 79NA9 - Stock damage, abandoned. 79KA38 - Not harvested. 79A2, 79B7, 79BA5 - not sown, …

A New Species Of Cerapus Say, 1817 (Crustacea: Amphipoda) From The Northern Gulf Of Mexico, With Notes On Its Ecology, James Darwin Thomas, Richard W. Heard

Marine & Environmental Sciences Faculty Articles

During research in coastal marshes of the Mississippi Delta region in 1975, a large, undescribed amphipod belonging to the genus Cerapus was discovered in tidal channels. This new species, C. benthophilus, is characterized by its large size and 7-12 segmented antennal flagella. Habitat preference is muddy silt bottoms upon which it constructs conspicuous mats or "tufts" of interwoven tubes in shallow coastal bays and marshes from Louisiana to the panhandle areas of northern Florida.

A Redescription Of The Wood-Rasping Amphipod Trophichelura Gomezi Ortiz, 1976 (Cheluridae) From The Florida Keys, With Notes On Its Distribution And Ecology, James Darwin Thomas

Marine & Environmental Sciences Faculty Articles

The wood-rasping amphipod, Tropichelura gomezi Ortiz, 1976, is redescribed from the Florida Keys to include diagnostic characters omitted in the original description. Morphological characters and distributional patterns of T. gomezi are compared with those of the other member of the genus, Tropichelura insulae (Caiman, 1910). Laboratory studies show that T. gomezi defends its burrow entrance from other members of its species, but tolerates the presence of limnoriid isopods with which it cooccurs. A lectotype for Tropichelura insulae is designated .

1979 Summary Of Results Of Field Experiments, A Bokor

Experimental Summaries - Plant Research

(1) Bunch Rot Control of Rhine Riesling Grapes: 78AL46. (2) Bunch Rot (Bunch Breakdown) on Rhine Riesling Grapes: 78AL47. (3) Black Spot (Ascochyta Blight) of Processing Peas: 79AL45.

1979 Phosphorus And Sulphur Interactions On Pastures. Sulphur Nutrition Of Pastures, J. S. Yeates, M. F. Clarke

Experimental Summaries - Plant Research

Contents: Phosphorus and sulphur interactions on pastures. Sulphur nutrition of pastures. (i) Phosphorus x sulphur x times of application on pastures 1979: 79AL2, 79BY1, 79KE3, 79KE4.

(ii) Sulphur status/soil tests on pastures: 79AL18, 79AL22, 79AL25, 79AL41, .79BY2, 79BY3, 79BY4, 79HA1, 79HA2, 79HA3, 79KE7, 79M020.

(iii) Time of application of sulphur to pastures: 79BU1,79KE6.

(iv) Phosphorus, sulphur and potassium fertilisers on pastures on deep leaching sands: 79AL1, 79KE2, 79MA2, 79MA6.

(v) Phosphorus x sulphur interaction trials 1978; 1979 treatments: 78A7, 78BA8, 73B4, 78BU3, 78C4, 78MA2, 78M08, 78N04.

Nitrogenous Fertiliser Requirements In Different Cropping Rotations - 1979 Results, M G. Mason, I Rowland

Experimental Summaries - Plant Research

Nitrogen requirement of wheat after clover, lupins and cereal - 78C1, 78N1. Nitrogen requirement of barley after clover, lupins and cereal - 78E3. Nitrogen fertiliser requirement in alternate crop-pasture rotation. Botanical composition of Pasture blocks (Sampled 16/9/79) - 78BA1. Pasture Blocks (Sampled 3/9/79) - 78WH2.