Digital Commons Network^™

Tillage Systems For Row Crop Production, Elbert C. Dickey, Allen Rider, Phillip W. Harlan

Department of Agricultural and Biological Systems Engineering: Faculty Publications

Selecting a tillage system that is best suited to a particular farming situation is an important management decision. In the past, a crop producer's primary concerns were field capacity and the costs of owning and operating equipment. However, with rapidly increasing energy costs, alternative tillage systems are being carefully evaluated and selected by more producers.

Previously, the most common tillage system included a moldboard plow to turn residue under either in the fall or spring. Following plowing, spring tillage normally included one or more shallow diskings to kill weeds, incorporate fertilizer and pesticides, and provide loose soil for seed. Other …

The Prairie Naturalist Volume 13, Number 1. March 1981

The Prairie Naturalist

EDITOR: Dr. Paul B. Kannowski

BOOK REVIEW EDITOR: Douglas H. Johnson

TABLE OF CONTENTS

WATERFOWL USE OF A MUNICIPAL SEWAGE LAGOON ▪ G-A. D. Maxson

MASS MORTALITY OF MUSSELS FROM SLUMPING ALONG THE RED LAKE RIVER NEAR CROOKSTON, MINNESOTA ▪ A. M. Cvancara, D. J. Brown, D. K. Cudworth, and T. R. Klett

CHRISTMAS BIRD COUNTS FOR NORTH DAKOTA — 1980 ▪ R. N. Randall

BREEDING BIRDS ON WATERFOWL PRODUCTION AREAS IN NORTHEASTERN NORTH DAKOTA ▪ H. F. Duebbert

FURTHER EVIDENCE OF MARSH HAWKS FEEDING ON DUCKS ▪ R. A. Wishert, R. M. Kaminski, and D. W. Soprovich

FIRST NEST …

A New Species Of Rhynchomys (Muridae) From The Philippines, Guy G. Musser, Patricia W. Freeman

University of Nebraska State Museum: Mammalogy Papers

". . . Mr. Whitehead has made a most wonderful and unexpected discovery, that of a new and peculiar Mammal-fauna inhabiting the Luzon highlands, and, so far as is yet known, mostly isolated on a small plateau on the top of Monte Data, in the centre of Northern Luzon, at an altitude of from 7000 to 8000 feet." With this dramatic announcement, Oldfield Thomas (1898:377) introduced to naturalists the spectacular rats found by Whitehead: Crateromys schadenbergi, Carpomys melanurus, C. phaeurus, Batomys granti, Chrotomys whiteheadi, Celaenomys silaceus, and Rhynchomys soricoides. One of the most interesting of these to Thomas was …

Correspondence Of Food Habits And Morphology In Insectivorous Bats, Patricia W. Freeman

University of Nebraska State Museum: Mammalogy Papers

In a morphometric study of molossid bats (Freeman, in press), I found that the first principal component (PC) reflected overall size. The second PC was concerned with a suite of jaw and skull measurements that separated molossids with thicker jaws, fewer but larger teeth, and welldeveloped cranial crests (i.e., bats with robust skulls) from those with thinner jaws, more but smaller teeth, and less developed cranial crests. Subsequently, I found (Freeman, 1979) that molossids with robust skulls ate hard-shelled insects such as beetles. and that molossids with gracile skulls ate soft-bodied insects such as moths. Given these conclusions I was …

Trematode-Gastropod Associations In Nine Non-Lacustrine Habitats In The Mwanza Region Of Tanzania, Sam Loker, H. G. Moyo, Scott Lyell Gardner

Harold W. Manter Laboratory of Parasitology: Faculty Publications

Between August 1978 and July 1979, freshwater gastropods were collected at monthly intervals from 9 different non-lacustrine habitats in the Mwanza region of Tanzania. Of a total of 11 708 gastropods representing 14 species, 1748 (14.9 %) were infected with trematode sporocysts and/or rediae. Altogether 38 morphologically distinguishable ‘species’ of cercariae were recovered (13 furcocercous, 10 xiphidiocercaria, 6 echinostome, 4 cystophorous, 3 gymnocephalous and 2 amphistome species), 22 of which did not conform to previously described African species. The majority (63.8%) of all mature infections were xiphidiocercariae. Biomphalaria pfeifferi, B. sudanica and Ceratophallus natalensis each yielded 11 species of …

Function Of Mentzelia Nuda (Loasaceae) Postfloral Nectaries In Seed Defense, Kathleen H. Keeler

School of Biological Sciences: Faculty Publications

Mentzelia nuda is a coarse, short-lived perennial of the High Plains of North America. The flowers secrete nectar which serves as an attractant for pollinating bees. Postfloral nectar secretion attracts ants whose presence significantly enhances seed set. This is the first demonstration of advantage to postflowering activity of a floral nectary.

Relationship Between Production And Stayability In Holstein Cattle, G. F. S. Hudson, L. Dale Van Vleck

Department of Animal Science: Faculty Publications

Records from 97,555 first daughters of 1,487 Holstein sires in artificial insemination were used to estimate components of variance and covariance of first lactation milk and fat production and stayability to 36, 48, 60, 72, and 84 mo of age. Henderson's Method 3 was used with a model including fixed herd-year- season and genetic group effects and random sire within group and residual effects. Heritabilities for milk and fat production and 36-, 48-, 60-, 72-, and 84-mo stayability were .31, .30, .02, .04, .05, .05, and .05. Genetic and phenotypic correlations between milk production and stayability ranged from .47 to …

Observations On Bats From Trinidad, With A Checklist Of Species Occurring On The Island, Catherine H. Carter, Hugh H. Genoways, Robert S. Loregnard, Robert J. Baker

University of Nebraska State Museum: Mammalogy Papers

In their comprehensive treatment of the bats of Trinidad, Goodwin and Greenhall (1961) reported 58 species from the island. Subsequent authors (Goodwin and Greenhall, 1962, 1964; Genoways et al., 1973a; LaVal, 1973a, 1973b) have added some species to the list and changed the status of others so that the known chiropteran fauna of Trinidad now comprises 64 species: five emballonurids, one noctilionid, four mormoopids, 36 phyllostomids (see Handley, 1980, for family-group names), one natalid, one furipterid, one thyropterid, seven vespertilionids, and eight molossids. Among the phyllostomids, the subfamilies Phyllostominae (15) and Stenodermatinae (14) are the best represented, whereas only a …

Determination Of Age And Whelping Dates Of Live Red Fox Pups, Alan B. Sargeant, Stephen H. Allen, Douglas H. Johnson

United States Geological Survey, Northern Prairie Wildlife Research Center: Publications

Public concern for large carnivores, high longhair fur prices, and recent findings of predator-prey investigations have increased interest in the management of red foxes (Vulpes vulpes). A technique for assigning individuals to age-classes is necessary to understand the population dynamics and behavioral interactions of this species.

The Role Of Nutrient Reserves In Mallard Reproduction, Gary Krapu

United States Geological Survey, Northern Prairie Wildlife Research Center: Publications

Mallard (Arias platyrhynchos) populations breeding in temperate North America obtain a significant part of the energy and lipid requirements of reproduction at sites occupied prior to arrival on the breeding grounds. Protein for egg formation, however, is obtained principally from the diet during the nesting period. Both sexes arrive heavy and fat in North Dakota but experience substantial weight loss and lipid depletion during the nesting cycle. Weight loss is most pronounced among females and averages 25% from prelaying to late incubation. Body weights of both sexes are positively correlated with carcass lipid content. The paired male draws …

Influence Of Phosphate Source On Vesicular-Arbuscular Mycorrhizae Of Bouteloua Gracilis, Michael F. Allen, James C. Sexton, Thomas S. Moore Jr., Martha Christensen

Department of Plant Pathology: Faculty Publications

Non-mycorrhizal and vesicular-arbuscular mycorrhizal Bouteloua gracilis infected with Glomus fasciculatus were grown in defined media containing different phosphate sources and compared with respect to phosphate content and form, biomass, chlorophyll concentration, and root phosphatase activity. The phosphate sources were sodium monobasic phosphate, a mixture of sodium monobasic phosphate and calcium phytate, and calcium phytate. Inositol and inositol plus calcium were added to the sodium phosphate medium as additional treatments. Mycorrhizal infection was highest in roots of plants grown in the presence of phytate (75%). Lower root infection levels were noted in plants from the sodium phosphate (19%) and mixed phosphate …

Aquatic Habitat Inventory Of The Missouri River From Gavins Point Dam To Ponca State Park, Nebraska, James C. Schmulbach, Jeffrey J. Schuckman, Eric A. Nelson

United States Army Corps of Engineers, Omaha District

One of the few reaches of the Missouri River which remains in a relatively natural free-flowing state is a 93 km segment extending from Gavins Point Dam to Ponca State Park, NB. This reach of the river was designated as a National Recreational River (P.L.95-625, Sect. 707, 1978) because the natural and cultural values of this section were considered worthy of preservation. Early in 1979, the Secretary of the Interior designated the Heritage Conservation and Recreation Service (HCRS) as the agency responsible for developing a management plan for the Missouri Recreation River. The HCRS teamed with the U.S. Army Corps …

Missouri National Recreational River: Native American Cultural Resources, John Ludwickson, Donald Blakeslee, John O'Shea

United States Army Corps of Engineers, Omaha District

An inventory of known and identifiable cultural resources referrable to Native American populations was undertaken for a corridor along the new Missouri National Recreational River, roughly from Gavin's Foint Dam to Ponca, Nebraska. These resources included archaeological sites and collections, ethnographic and ethnohistorical data and relevant environmental background information. Using these data the Native American occupation of the Missouri National Recreational River area was synthesized into a regional overview which stresses culture-historical developments and changing adaptations to the natural environment. Problems for continuing research utilizing existing archaeological collections were developed, and recommendations for continued field work to fill in gaps …

The White Perch, Marone Americana (Gmelin) In Nebraska, Gene Zuerlein

Nebraska Game and Parks Commission: White Papers, Conference Presentations, and Manuscripts

The white perch, Morone americana (Gmelinl, is a member of the Percichthyidae family. It is a euryhaline species that is common along the northern Atlantic coast south to the Carolinas. Marine, estuarine and freshwater ecosystems with salinities ranging from 5 to 18 percent have been known to support white perch (Mansueti 1964). The species is semianadromous, making spawning runs up coastal streams. It commonly becomes completely landlocked in ponds and reservoirs of its native range where it spawns successfully. This species has been known as a game fish to generations of New England fishermen, but when stocked in landlocked waters …

590 Plan: 10 Year Plan For Extension, Research & Forestry By 1990 For Southeast Nebraska, Loyd L. Young, Elizabeth A. Birnstihl

Southeast Research and Extension Center: Reports and Administration

The material following this letter represents the final draft of the ten-year plan for the Southeast Extension and Research Center and Extension District v.

The purpose of this ten-year plan (which will hereafter be called the 590 Plan) is to provide:

1. Broad objectives for programming in extension, research and forestry programs for our unit.

2. More specific objectives for programming in the subject matter areas of:

a. Animal Science

b. Community Resource Development

c. Family Living

d. Farm Management and Marketing

e. Forestry and Natural Resources

f. Horticulture

g. Irrigation

h. Leadership

i. Plant Science

j. Youth …

Bibliographie Pflanzensoziologischer Arbeiten Über Die Mongolische Volksrepublik, Werner Hilbig

Erforschung biologischer Ressourcen der Mongolei / Exploration into the Biological Resources of Mongolia, ISSN 0440-1298

Zusammenfassung

Die Bibliographie enthält pflanzensoziologische und vegetationsökologische Veröffentlichungen aus dem Gebiet der Mongolischen Volksrepublik (MVR) von den zwanziger Jahren bis zum Jahre 1979. Es werden 217 Arbeiten zitiert. Der Großteil dieser Publikationen stammt aus der Feder sowjetischer Geobotaniker,

Namru-3 Translations Of Parasite Literature From Russian, French, Japanese, Etc. Into English (1921-1981) T1401-T1500, United States Naval Medical Research Unit Number Three, Cairo, Medical Zoology Department

United States Naval Medical Research Unit 3: Publications

T1401. TRANSLATION FROM RUSSIAN. L'VOV, D. K., GROMASHEVSKY, V. L., SIDOROVA, G. A., TSIRKIN, Yu. M. CHERVONSKY, V. L. GOSTINSHCHIKOVA, G. V. and ARISTOVA, V. A. (1971). Isolation of a new arbovirus Baku of Kemerovo group from argasid ticks Ornithodoros coniceps. in Azerbaijan. Vop. Virus., 16(4):434-437.

T1402. TRANSLATION FROM RUSSIAN. ALEKSANDROV, Yu. V., KORYAGIN, V. L. and YOVAL'CHUK, Zh. T. (1970). Observations on ecological biological properties of Hyalomma plumbeum ticks in eastern Crimea. Tezisy Dokl. 2. Akarol. Soveshch., (1):22-24.

T1403. TRANSLATION FROM RUSSIAN. MATEVOSYAN, K. Sh., KARASEVA, P. S. and SEMENOV, B. F. (1974). Study of potential arbovirus foci in …

Tornadoes West Of The Divide: A Climatology, Richard P. Mcnulty

National Oceanographic and Atmospheric Administration: Technical Reports and Related Materials

A climatology of tornado occurrence west of the Continental Divide is presented. These tornadoes are a small but significant part of severe weather occurrences over the United States. Data are examined from both the spatial and temporal point of view. The influence of population and topography is highly evident.

Giving-Up As A Poisson Process: The Departure Decision Of The Green Lacewing, Alan B. Bond

Alan Bond Publications

Predators that forage for aggregated prey appear to require a decision rule for determining the point at which to discontinue their search in a given prey patch and move on to another. Although the optimum rule depends heavily on features of the searching behavior of the predator and the distribution of the prey (Oaten 1977), most previous authors have assumed that the decision must involve an assessment of the capture rate within a patch and a comparison with the mean capture rate in the environment as a whole (Krebs 1978). When the perceived quality of the given patch becomes significantly …

Spezialistenverzeichnis Für Die Bearbeitung Der Arthropodenfauna Der Mvr, Manfred Dorn, Michael Stubbe

Erforschung biologischer Ressourcen der Mongolei / Exploration into the Biological Resources of Mongolia, ISSN 0440-1298

Seit mehr als 20 Jahren führen Biologen der Staatlichen Mongolischen Universität Ulan-Bator und von Akademie-Instituten der Mongolischen Volksrepublik gemeinsam mit Zoologen und Botanikern befreundeter wissenschaftlicher Partnereinrichtungen insbesondere der DDR, der UdSSR, der CSSR sowie der Volksrepublik Ungarn in großem Umfang Expeditionen zur Erforschung der biologischen Ressourcen der MVR durch. Im Rahmen dieser Expeditionen wurde unter anderem ein umfangreiches Arthropodenmaterial gesammelt, dessen Bearbeitung einen wesentlichen Beitrag zur Erschließung der mongolischen Entomofauna darstellt. Von besonderer Bedeutung sind die Veröffentlichungen in der bereits auf 7 Bände angewachsenen Publikationsreihe "Nasekomye Mongolii" (Leningrad), die Ergebnisse der Expeditionen von Dr. Z. KASZAB (Budapest) sowie jene der …

Die Entwicklung Der Lehrstühle Für Zoologie Und Botanik An Der Mongolischen Staatsuniversität Ulan-Bator, Naniragijn Dawaa, Zedengijn Schamsran

Erforschung biologischer Ressourcen der Mongolei / Exploration into the Biological Resources of Mongolia, ISSN 0440-1298

Describes the history of the Zoology and Botany Departments in the National University of Mongolia before 1981.

Die Entwicklung Der Zasammenarbeit Auf Biologischem Gebiet Zwischen Der Mvr Und Ddr Seit 1962, Michael Stubbe, Naniragijn Dawaa, Werner Hilbig, Zedengijn Schamsran

Erforschung biologischer Ressourcen der Mongolei / Exploration into the Biological Resources of Mongolia, ISSN 0440-1298

Mit zwei großen komplexen biologischen Sammelexpeditionen 1962 und 1964 der Akademien der Wissenschaften der DDR und MVR in die Süd- und Westmongolei wurde der Grundstein für die kontinuierliche Entwicklung der Wissenschaftskooperation auf biologischem Gebiet zwischen beiden Staaten gelegt. Die Kollektionen wurden zum Grundstock eines aufzubauenden botanischen und zoologischen Sammlungsfundus in Ulan-Bator. Durch den Freundschaftsvertrag zwischen den Universitäiten Halle und Ulan-Bator im Jahre 1967 wurden die Kontakte neu aktiviert. Nach anfänglich sporadischen Studienaufenthalten und Expeditionsreisen von Einzelwissenschaftlern wurde das Forschungsprogramm auf biologischem Gebiet im Rahmen dieses Freundschaftsvertrages recht bald auf Schwerpunktaufgaben ausgerichtet, die sich lückenlos in das Forschungsprofil des mongolischen Vertragspartners …

Die Erforschung Der Herpetofauna Der Mongolischen Volksrepublik: Situation Und Perspektiven, Günther Peters

Erforschung biologischer Ressourcen der Mongolei / Exploration into the Biological Resources of Mongolia, ISSN 0440-1298

First paragraph:

Die Landschaften der Mongolei sind arm an Reptilien- und Amphibienarten. Dieser Umstand mag die Frage aufwerfen, ob herpetologische Untersuchungen in Beschränkung auf das Territorium der MVR eine nennenswerte Perspektive haben könnten, nachdem Artenspektrum und Verbteitung der Species annähernd vollständig erkundet sind. Ein Herpetologe wird zweifellos für seine Arbeit auch in diesem Land eine Zukunft sehen, doch muß wohl von vornherein eingestanden werden, daß das Volumen der Probleme dieses Faches hinter denen der übrigen Disziplinen der Vertebratenzoologie und der Entomologie in einem bescheidenerem Rahmen verbleibt. Dies gilt sowohl im rein wissenschaftlichen als erst recht auch im angewandten Bereich ihrer …

Toward A History Of Plains Archeology, Waldo R. Wedel

Great Plains Quarterly (through 2013)

First viewed by white men in 1541, the North American Great Plains remained little known and largely misunderstood for nearly three centuries. The newcomers from Europe were impressed by the seemingly endless grasslands, the countless wild cattle, and the picturesque tent-dwelling native people who followed the herds, subsisting on the bison and dragging their possessions about on dogs. Neither these Indians nor the grasslands nor their fauna had any counterparts in the previous experience of the Spaniards. Later Euro-American expeditions, whether seeking gold, converts, or furs, added many details of much interest, but likewise found no wealth of minerals, too …

Institutional Responsibility: Professionalism And Ethics, Milton R. Wessel

Nebraska Law Review

I. Introduction

II. The Berkey Case

III. Effects of Collateral Evidence

IV. Responsibility of the Law Firm

V. Responsibility of the Corporation

VI. Other Institutional Responsibilities

VII. Conclusion

Influence Of Age, Sex, And Calcium And Phosphorus Levels On The Mechanical Properties Of Various Bones In Swine, T. D. Crenshaw, E. R. Peo, Jr., A. J. Lewis, B. D. Moser, D. Olson

Department of Animal Science: Faculty Publications

Seventy-two 4-week-old pigs were randomly assigned by sex (gilts, barrows, boars) to two dietary treatments and four age periods for determinations of the effects of age, sex and Ca and P levels on the mechanical properties of various bones in swine.

Ec81-1238 A Common Sense Approach To Turfgrass Insect Damage Prevention And Control, Arthur H. Bruneau, David Bishop, Robert C. Shearman

University of Nebraska-Lincoln Extension: Historical Materials

Extension Circular 81-1238: A common sense Approach to Turfgrass Insect Damage Prevention and Control; introduction, detection, pest management practice, key to lawn insects, white grubs, bluegrass billbug, sod webworm, true armyworm, cutworms, green-bugs, fall armyworms, chinch bugs, occurrence and treatment timing chart.

Bone Strength As A Trait For Assesing Mineralization In Swine: A Critical Review Of Techniques Involved, T. D. Crenshaw, E. R. Peo, Jr., A. J. Lewis, B. D. Moser

Department of Animal Science: Faculty Publications

Lack of standardized test procedures has resulted in considerable variation in reported values for bone strength. Such variation can be attributed in part to the type of instruments used to determine physical properties of bone, procedures used to prepare the bones for testing and equations used to calculate strength. If bone strength is to be used as a major criterion of response in mineral nutrition research, standardization of procedures for measuring and reporting bone strength is essential. Traits that describe the mechanical properties of bone as determined in the commonly used flexure test in which force is applied perpendicularly to …

Effect Of Level Of Dietary Calcium-Phosphorus During Growth And Gestation On Performance, Blood And Bone Parameters Of Swine, R. D. Nimmo, E. R. Peo, Jr., B. D. Moser, A. J. Lewis

Department of Animal Science: Faculty Publications

One-hundred and ninety-two crossbred weanling gilts (7.25 kg) were assigned to one of two treatments - (A) .65% Ca, .50% P or (B) .975% Ca, .75% P - and fed to an average weight of 92.8 kilograms. Average daily gain (.65 and .67 kg, respectively) and feed/gain were not affected by dietary treatment, but average daily feed intake was lower (P<.05) for gilts on treatment A (1.87 vs 1.95 kg).

Effects Of Reduced Tillage And Multiple Cropping On Plant Diseases, Donald R. Sumner, Ben Doupnik Jr., M. G. Boosalis

Department of Plant Pathology: Faculty Publications

In the past, tillage research on plant diseases was concerned primarily with practices that buried plant residues in single-crop production systems. The burial of plant debris to destroy pathogens is an ancient agricultural prac­ tice (34). Each crop was tested as a single entity, and most crop rotations were based on one crop per year. Interest in notill and conservation tillage systems and mUltiple cropping has increased in the past two decades be­ cause of the scarcity and increased cost of fossil fuels, periodic world food shortages, and the concern over soil erosion (73,110). These concerns are of such paramount …