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Local And Regional Components Of Sensible Heat Advection, T. W. Brakke

School of Natural Resources: Dissertations, Theses, and Student Research

No abstract provided.

Local And Regional Components Of Sensible Heat Advection, T. W. Brakke

School of Natural Resources: Dissertations, Theses, and Student Research

No abstract provided.

Influence Of Irrigation On The Microclimate And Development Of White Mold Disease In Dry Edible Beans, L. E. Hipps

School of Natural Resources: Dissertations, Theses, and Student Research

No abstract provided.

Callus And Suspension Cultures Of Melilotus Alba Tissues And Cells, Tomoaki Taira, Francis A. Haskins, Herman J. Gorz

Department of Agronomy and Horticulture: Faculty Publications

These studies were designed to define conditions for the satisfactory establishment and maintenance of sweetclover (Melilotus alba Desr.) callus and cell suspension cultures. Callus was derived from cotyledons and hypocotyls of germinated sweetclover seeds of various genotypes. Under the conditions used, 2,4-dichlorophenoxyacetic acid (2,4-D) was effective (optimal concentration ca I mg/liter) for callus induction; other auxins and cytokinins were ineffective. Best callus growth occurred at a 2,4·D concentration of about 2 mg/liter and a sucrose concentration of 2%. Callus growth was improved by casein hydrolysate (0.9 g/liter). Glutamic acid appeared to be the most important single amino acid in …

Measurement Of The Xenon Σ3/2:Σ1/2 Branching Ratio Within The Xe 5s5p66p(1P1) Resonance, Peter C. Kemeny, James A. R. Samson, Anthony F. Starace

Anthony F. Starace Publications

Photoionization of the 5p6 shell in xenon leaves the ion in either the 5p⁵(²P_3/2) or np⁵(²P_1/2) state. Measurements of the ²P_3/2 : ²P_1/2 branching ratio are reported within the Xe 5s5p⁶6p(¹P₁) resonance and fitted to a new theoretical expression. The maximum value of the ratio as determined by a two-parameter fit of theory to experiment is 8.8 ± 0.5 within the resonance, almost six times the nearly constant value of 1.55 found outside any resonance.

Theory And Applications Of An Atoms In Molecules Approach To The Xα -Scf Method, J. Tylicki, R.J. Hood, Gordon A. Gallup, C.J. Eckhardt

Gordon Gallup Publications

We have studied the Xα -SCF problem with an atoms in molecules approach. LCAO-molecular orbitals are used and the molecular charge and exchange densities are built up from atomic contributions. We have applied our method to CH₃F with subsequent comparison to ab initio calculations. The Xα -SCF dipole moment of CH₃F is 1.76 D compared with an experimental value of 1.79 D. We also give calculations of TCNQ and TTF with comparisons to recent Xα calculations using the overlapping sphere modification of a muffin-tin potential. Quadrupole moments for TCNQ and TTF have also been determined. The …

Farm, Ranch And Home Quarterly Institute Of Agriculture And Natural Resources, University Of Nebraska- Lincoln

Farm, Ranch and Home Quarterly

In this issue:

A Message from the Vice Chancellor ......................... 2

International 4-H Youth Exchange ............................ 3

When Sudden Infant Death Strikes ........................... 4

Have You Been Duped? .................................... 6

Rain or Drought-Your Guess or Mine? ....................... 8

Becoming the Me I'd Like to. Be .............................. 10

TLC for Your Plants ........................................ 12

AgriScope ................................................. 15

Wheat Leaf Rust Attacks Crap Yields .......................... 16

Small Beef Packers Undergo. Changes ......................... 18

Energy Impacts on Nebraska Agriculture ...................... 20

Irrigation Scheduling Saves Time and Money .................. 22

Agricultural Experiment Station News April 1977

Agricultural Research Division: News and Annual Reports

CONTENTS:
FROM THE DIRECTOR'S DESK
PERSONNEL ACTIONS
GENERAL NOTES
GRANTS AND CONTRACTS
NEBRASKA AGRICULTURAL EXPERIMENT STATION PUBLICATIONS - March 1977
BULLETINS PRINTED

Acuta Enews April 1977, Vol. 6, No. 4

ACUTA Newsletters

In This Issue

PRESIDENT'S MESSAGE

EDITORIAL

COMMUNCATIONS CONSULTANTS

FEATURED INSTITUTION

ANNUAL REPORT

BOARD OF DIRECTOR'S MEETING

NEW MEMBERS

1978 CONFERENCE DATES

MAJOR TELECOMMUNICATIONS CONFERENCE

PROPOSED BUDGET 1977-78

An Analysis Of The Dependency Structure Between A Gilt's Prebreeding And Reproductive Traits. I. Phenotypic And Genetic Correlations, L. D. Young, R. K. Johnson, I. T. Omtvedt

Department of Animal Science: Faculty Publications

This study involved the records of 339 purebred Duroc, Hampshire and Yorkshire gilts and 192 two-breed cross gilts resulting from matings among the three breeds. The primary purpose of this paper was to investigate the relationship of prebreeding traits, including the growth of the gilt and her littermates, with subsequent measures of reproduction. Heritabilities were estimated for several traits and in general the estimates were somewhat higher than most estimates in the literature. Genetically, all measures of growth were favorably and moderately to highly correlated to ovulation rate, with the relationship being stronger for traits measured late in growth as …

An Analysis Of The Dependency Structure Between A Gilt's Prebreeding And Reproductive Traits. Ii. Principal Component Analysis, L. D. Young, R. K. Johnson, I. T. Omtvedt

Department of Animal Science: Faculty Publications

Seventeen variables measured before breeding and three measures of reproduction were taken on 339 purebred Duroc, Hampshire and Yorkshire gilts and 192 two-breed cross gilts resulting from matings among these breeds. Eight principal components accounted for 90% of the dependency structure existing among the 17 traits measured before breeding. Two principal components accounted for 97% of the dependency structure existing among the three reproductive traits.

The first principal component (PCll) from the prebreeding traits was a general measure of growth ability and accounted for 28% of the variation in the 17 measurements. The second principal component (PC12) contrasted slow growing …

An Epornitic Of Avian Cholera In Waterfowl And Common Crows In Phelps County, Nebraska, In The Spring, 1975, Joseph Zinkl, Norm Dey, Joseph Hyland, James Hurt, Kenneth Heddleston

Nebraska Game and Parks Commission: Staff Research Publications

In the spring of 1975, many species of waterfowl and common crows (Corvus brachyrhynchos) were found dead in Phelps County, Nebraska. About 25,000 waterfowl and at least 3,000 crows died in the epornitic. Few waterfowl were seen dying, but the crows experienced a chronic illness during which they became debilitated and were lethargic and dyspneic. Gross and microscopic lesions in the waterfowl were typical for acute avian cholera. The crows had dank, firm areas within the lungs, a loosely adhered yellow fibrous material in the pericardial sac and air sacs and, occasionally, liver abscesses. Microscopically, focal punulent pneumonia …

Aspergillosis In Common Crows In Nebraska, 1974, Joseph Zinkl, Joseph Hyland, James Hurt

Nebraska Game and Parks Commission: Staff Research Publications

During fall 1974, approximately 1,000 to 1,500 common crows (Corvus brachynhvnchos) died of aspergillosis in south-central Nebraska. The binds were debilitated, lethargic and dyspneic. On necropsy, typical lesions of aspergillosis were found in the lungs and air sacs. Histopathologic examination revealed granulomatous lesions around fungal hyphae in the respiratory system.

A General Contingency Theory Of Management, Fred Luthans, Todd I. Stewart

Department of Management: Faculty Publications

Recent formal recognition of situational influences on the management of complex organizations has led to an increasing number of contingency models, but a comprehensive and integrative theoretical framework for contingency management has been lacking. A General Contingency Theory (GCT) of Management is introduced as an overall framework that integrates the diverse process, quantitative and behavioral approaches to management; incorporates the environment; and begins to bridge the gap between management theory and practice

The Immunizing Potential Of Sporulated Oocysts Of Eimeria Nieschulzi Exposed To Heat And Co-60 Gamma-Radiation, George A. Conder, Donald W. Duszynski

Harold W. Manter Laboratory of Parasitology: Faculty Publications

Sporulated oocysts of Eimeria nieschulzi Dieben 1924, a rat coccidium, were exposed to radiation, heat, or both in an effort to attenuate the parasite. Moderate levels of each treatment or combination thereof attenuated the parasite, reduced pathogenesis (as judged by oocyst discharge during primary infection), and produced immunity to challenge when the oocysts were subsequently inoculated into rats. Thus, heat- and/or radiation-treated E. nieschulzi oocysts fed to rats could reduce pathogenesis during a primary infection and yet give good homologous protection.

Electron Tunneling, Charge Transfer, And The Intermolecular Forces Between Two H2 Molecules, Gordon A. Gallup

Gordon Gallup Publications

The spherically averaged van der Waals potential for the system H₂–H₂ has been calculated using a nonorthogonal CI method based on SCF orbitals for the individual molecules. With suitable restrictions on the CI calculation we have isolated various contributions to the van der Waals potential, and have found that charge transfer and dispersion effects are comparable to distances corresponding to the potential minimum. The charge transfer contribution is further discussed in terms of a mechanism involving electron tunneling through the intervening space between the molecules. Our calculation gives a spherically averaged van der Waals well depth of …

Comments On The Pine Vole In Orchards And Its Control, J. G. Barrat

Eastern Pine and Meadow Vole Symposia

There are many present orchard problems, most of them seasonal in nature, but few cause the serious losses that extensive vole injury does. Voles do their damage by feeding on the bark of the roots and at the crown of the trunk causing partial or complete girdling which weakens or kills the tree. Vole damage is feared because it means the loss of a tree or a group of trees as a maximum producing unit which takes several years to replace. Partially girdled trees may survive for years with low production. The lack of mouse control is often blamed on …

Vole Damage And Attempted Control In West Virginia, Bob Butler

Eastern Pine and Meadow Vole Symposia

Meadow and pine vole damage is the number one problem in commercial orchards in the West Virginia area. At present apple powdery mildew is second but vole (hereafter referred to as mouse) damage is first.

The Basis Of College Recommendations On Orchard Mouse Control In New York, James W. Caslick

Eastern Pine and Meadow Vole Symposia

We all depend heavily upon the advice of others, in making our day-to- day decisions. Months, and perhaps years, before the first ounce of a new rodenticide is used by an orchardist, a series of successful "convincings" must occur. A market analyst must convince his company that a new rodenticide is needed and that a suitable market exists. The company's researchers must convince management that their candidate rodenticide has potential worth exploring. Perhaps researchers outside the company then convince management that outside research services would be beneficial. Researchers must then convince regulatory agencies that the new rodenticide is effective against …

My View Of Our Pine Vole Control Problem, Steve Clark

Eastern Pine and Meadow Vole Symposia

In a recent survey of pine mouse infestation, it was determined that approximately 37% of the orchard land had serious enough damage to warrant control measures. Some growers are using chlorophacinone as a ground spray. We are also putting out tarpaper bait stations and baiting with either Ramik Brown or Rozol pellets. There has been mixed results with both methods and our growers are still looking for a better control method.

Pine Vole Control Research In Virginia, Ross E. Byers

Eastern Pine and Meadow Vole Symposia

A number of anticoagulant baits were found to be effective for the control of pine voles in apple orchards. The more toxic and acute the anticoagulant bait, the more effective the compounds appeared to be in field trials. A single 10 lb/A application of ICI 581, LM 637, and CPN gave excellent control in 1976 trials. Apple baits of ICI 581 and RH 787 also performed very well as a single 10 lb or 5 lb application per acre, respectively. Endrin applied to an orchard with a history of 10 years or more of annual applications did not control the …

Microtine Damage In Michigan Apple Orchards, Walt Conley, Craig S. Killian

Eastern Pine and Meadow Vole Symposia

The object of this study was to provide an estimate of the financial losses caused in Michigan's apple orchards by members of the genus Miarotus, and, if possible, to discover some of the factors affecting the amount of damage. Information was collected from apple growers and from direct observation of 1,520 Michigan apple trees. Data was collected concerning the winters of 1972-73 and 1973-74. Both of these years were characterized hy relatively low populations of microtine rodents in Michigan.

Economic Implications Of Using Zinc Phosphide To Replace Endrin In Apple Orchards, Walter L. Ferguson

Eastern Pine and Meadow Vole Symposia

Consideration is being given to suspend or restrict the use of endrin for controlling mice in orchards. If endrin were not available for this use, State extension and experiment station personnel in 6 Eastern States and 2 Western States estimated that apple production losses would increase from mice injury on 33,400 endrin-treated bearing acres, (12,500 acres in the Eastern States and 20,900 acres in the Western States). The 6 Eastern States include Georgia, Maryland, North Carolina, South Carolina, Virginia and West Virginia: the 2 Western States are Idaho and Washington. Estimates of production changes without endrin were made assuming zinc …

The Neadow Vole Situation In Maine Orchards, Francis J. Gramlich

Eastern Pine and Meadow Vole Symposia

Maine orchards produce quality apples--prihllirily }illcIntosh, Cortland, red and golden delicious. We have about 400,000 trees on 7,000 acres. Our production is still in standard trees that are widely spaced, although aL~ost all newer plantings are going to dwarfing stocks. The average orchard is quite small--between 50 and 100 acres. There are several over 200 acres. The largest is 700 acres and is in a class by itself. Most Maine orchards are relatively old and in heavy sod, consequently have have heavy grass and weed cover. Fall meadow mouse populations of more than 200 per acre have been recorded in …

Survival Rates Of Pine Voles In North Carolina Orchards, Don W. Hayne

Eastern Pine and Meadow Vole Symposia

There are a number of definitions of control of a pest. One of the competing definitions, and probably the most common even if not accepted in advanced circles, is to kill off the pest. Translated, this says: to increase the mortality rate, preferably to an extreme degree. I am going to talk here about survival rates. A survival rate is just the complement of the mortality rate - if survival is 80 percent, then mortality is 20 percent. It happens to be more generally useful in studying populations to deal with survival rates, so I hope I may be excused …

Thevole Problem In Pennsylvania Apple Orchards, George M. Greene

Eastern Pine and Meadow Vole Symposia

At the present time voles are the single most destructive pest in apple orchards in Pennsylvania. No other pest can inflict the type of damage that can kill apple trees as surely as girdling. Orcharding involves tremendous investments ($2,000 - $3,000 per acre) and these investments are being seriously threatened by localized outbreaks of pine and meadow vole infestations.

Development Of Pp581 Rodenticide By Ici-United States, Inc., Dale E. Kaukeinen

Eastern Pine and Meadow Vole Symposia

The Agricultural Chemicals Division of ICI-US was formed in 1970 and is closely tied with Plant Protection Division (PPD) in England. PPD has world-wide responsibility for research, development and marketing of agricultural crop protection chemicals including herbicides, insecticides, fungicides, nematocides, plant growth regulators, and rodenticides. Past achievements have included 2,4-D, Paraquat, Diquat, and BHC, among others. Experimental compounds from the U.K. are evaluated and developed for the U.S. by the Biological Research Center at Goldsboro, N.C. Facilities on this 250 acre site include fully-equipped laboratories for the formulation, research, development, and residue departments. Field trials can be carried out on …

Pine And Meadow Research In Pennsylvania Relevant To Control In Orchards, Robert G. Anthony

Eastern Pine and Meadow Vole Symposia

Results from field studies and questionnaires mailed to commercial orchardists in Pennsylvania indicate use of orchards by wildlife poses management problems for orchardists, horticulturists, county extension agents, and wildlife managers. Data substantiate the detriment of wildlife to orchard trees and fruits as viewed by commercial orchardists. In addition, existing control methods are often inconsistent and ineffective and necessitate use of toxic substances which may have far-reaching environmental effects. Consequently, a need for sounder management of wildlife in orchards is apparent. Studies at The Pennsylvania State University have focused on: (1) surveys on the extent and severity of wildlife damage in …

The Ir-4 Project Can Help, Drew Baker

Eastern Pine and Meadow Vole Symposia

You are probably wondering what IR-4 stands for. It means Interregional Project No.4 and it is funded by the U.S. Dept. of Agriculture and all of the state agricultural experiment stations. Its purpose is to obtain data to meet EPA requirements for registrations and tolerances on minor crops and specialty uses. The pesticide industry will sometimes conclude that the potential profit from some minor use is too small. When this is the case, IR-4 attempts to fill the data gaps. Since the states and USDA have only limited facilities for toxicity and environmental studies, IR-4 limits itself to those projects …

Position Relative To Endrin And Zinc Phosphide For Control Of Pine Mice And Meadow Mice, R. N. Barber

Eastern Pine and Meadow Vole Symposia

Barber Orchards has been an operating orchard since 1903. We are commercial growers with about 31,000 trees. Our number one problem over the years has been the loss of trees due to destruction of root systems by these two species of rodents.