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Forage Value Of Weed Species In A Grass Seeding, B. K. Lawrence, S. S. Waller, L. E. Moser, Bruce Anderson, L. L. Larson

Proceedings of the North American Prairie Conferences

Weeds are a major problem in seeding rangeland and cropland to native grasses. However, many immature weedy forbs and grasses are palatable to cattle. Research was conducted using yearling cattle for weed control in big bluestem (Andropogon gerardii var. gerardii Vitman) seedings (1987, 1988) at Mead, Nebraska on a Sharpsburg silty clay loam (fine, montmorillonitic, mesic Typic Argiudoll) soil. Prominent volunteer species were annual foxtails (Setaria spp. Beauv.), redroot pigweed (Amaranthus retroflexus SSL.), velvetleaf (Abutilon theophrasti Medic.), and common ragweed (Ambrosia artemisiifolia L.). Cattle consumed annual foxtails and redroot pigweed, but did not consume velvetleaf …

Small Mammals Of A Relict Wet Prairie In Ohio, Eric D. Osborn, Carl W. Hoagstrom

Proceedings of the North American Prairie Conferences

Killdeer Plains is a Wildlife Area in northwest Ohio managed primarily for waterfowl. At the turn of the century, the area was a wet prairie remnant of the prairie peninsula. Despite attempts at drainage and farming, parts of the area retain the characteristics of a wet prairie. Two spruce-pine (Picea - Pinus) clumps in the plains are used as winter roosts by long-eared owls (Asio otus). Pellets regurgitated by these owls were examined to determine the species and relative numbers of small mammals in the area. Nearly 90% of all individuals taken by the owls were …

Small Bison Herd Utilization Of Tallgrass Prairie, Lorence Larson, G.K. Murdock

Proceedings of the North American Prairie Conferences

The utilization of a tall grass prairie remnant by a small bison (Bison bison) herd is described. Three bulls and six cows were introduced to a 257 ha section of Prairie State Park, Liberal, Missouri in 1985. Between 1985 and March 1988, ten calves were born; four cows and a bull were introduced to the herd in 1988. Since March 1986, the behavior of the herd has been observed three times per week, year-round. The portion of the herd using mowed fire breaks or burned or unburned portions was determined at ten-minute intervals; for 3,249 observations over 213 …

Remarks By The President At Swearing-In Ceremony Of Secretary Of Agriculture Clayton Yeutter, Clayton K. Yeutter

Clayton K. Yeutter, United States Secretary of Agriculture: Papers

THE PRESIDENT: Thank you, Peter, and all the members of the Cabinet; the members of the United States Congress here; distinguished ambassadors and others. I've come over here today for the swearing-in of our Secretary. Clayton Yeutter is about to make an enduring commitment to this Department and I should acknowledge the fact that I think five of his predecessors are here today -- Democrats and Republicans which I think gives him an extraordinarily good send-off. There's a difference, you know, between involvement and commitment. You all know it. Remember the old farmer making eggs and bacon. The chicken is …

Using Plant Breeding And Genetics To Overcome The Incidence Of Grass Tetany, D. A. Sleeper, Kenneth P. Vogel, K. H. Asay, H. F. Mayland

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

Plant breeders developing cultivars to minimize the hazards of grass tetany are concentrating largely on increasing herbage Mg concentrations in cool-season (C 3) grasses. Significant genetic variation has been found for Mg, Ca and K concentrations within C3 grass species studied to date. For most C 3 forage grass species, heritability estimates are highest for Mg, slightly lower for Ca and lowest for K concentrations. The largest genotype x environmental interactions are found for K values, whereas small environmental effects have been observed for Mg and Ca values. No C 3 forage grass cultivar has been developed to date that …

The Quest Of Dr. Ernest F. Bashford For Knowledge About Cancer Etiology In Man And Mouse, Anne J. Krush

Transactions of the Nebraska Academy of Sciences and Affiliated Societies

Dr. Ernest F. Bashford, an English physician,lived from 1873 to 1923. For many years before his untimely death, he was an officer for the Imperial Cancer Research Fund. From articles in the British Medical Journal and other publications, Bashford prepared a volume of reprints (1903-1909) concerning problems, growth, and heredity of cancer, and experiments with breast cancer in mice. Cancer had been studied histologically and clinically, with only speculation as to its origin, nature, and cause in man. He suggested cooperative studies by investigators in many different fields. Concerned with why the growth of cancer seemed limitless, and with problems …

Diversity Of Coprophagous Scarabaeidae (Coleoptera) In Grazed Versus Ungrazed Sandhills Prairie In Western Nebraska, Mary Liz Jameson

Transactions of the Nebraska Academy of Sciences and Affiliated Societies

Baited pitfall traps were used to compare the dung-feeding Scarabaeidae (Coleoptera) of a grazed versus an ungrazed sandhills prairie in western Nebraska. Traps yielded 14,832 coprophagous Scarabaeidae over a 4-week sampling period in 1987. Canthon ebenus (Say), C. pilurarius (L.), Onthophagous hecate Panzer, and O. pennsylvanicus Harold were the dominant species on both prairies. The Shannon-Wiener diversity index indicated that diversity was slightly higher on the grazed site whereas the Margalef diversity index showed the diversities to be nearly the same. Activity and foraging by scarabs (as measured by trapping success) were found to be most closely correlated with temperature …

Scaptomyza Nigrita Wheeler (Diptera: Drosophilidae), A Leaf Miner Of The Native Crucifer, Cardamine Cordifolia A. Gray (Bittercress), S. K. Collinge, Svata M. Louda

Svata M. Louda Publications

The biology of Scaptomyza nigrita on its host plant, a native crucifer (Bittercress) in the Rocky Mountains, is described. Development of each stage in the life history was studied both in the field and in the laboratory. This is the first documentation of a host for S. nigrita. We examined the activity of adult flies in two adjacent habitats, sun and adjacent willow shade. Adult flies were more abundant on bittercress plants in sun-exposed versus in shaded areas, and were most active from mid-day to late afternoon. Female flies were significantly larger than male flies, but there were no differences …

Selected Bibliography On Diseases And Parasites Of Fishes: Books, Proceedings, And Reviews, 1978-1989, Joyce A. Mann

United States Fish and Wildlife Service: Publications

This bibliography was prepared to assist students of fish health, fishery biologists, librarians, and others in selecting reading materials or developing library collections on the diseases and parasites of fishes. A continuation of Fish Disease Leaflet 53, "Diseases and parasites of fish: an annotated bibliography of books and symposium, 1904-1977," it includes English language books, proceedings, and review articles published from 1978 to 1989. It includes references that are readily available by purchase or through interlibrary loan. The references are arranged alphabetically by author surname and then by year within the following major subject classifications: general works, bacterial diseases, histology, …

Ard News December 1988

Agricultural Research Division: News and Annual Reports

CONTENTS:
ARD ADVISORY COUNCIL NOTES
SEASONS GREETINGS
GRADUATE STUDENT ENROLLMENT IN IANR PROGRAMS - FALL 1988
RESEARCH GRANTS AND CONTRACTS RECEIVED SEPTEMBER & OCTOBER, 1988
USDA TO SUPPORT NATIONAL NEEDS GRADUATE FELLOWSHIPS
FOOD PROCESSING CENTER DAY
PRIORITY RESEARCH INITIATIVES 1988-89
COOPERATIVE STATES RESEARCH SERVICE FUNDING
RESEARCH COUNCIL BUDGETS FOR 1988-89
GRANTS AWARDED FOR THE PERIOD OF JULY 1987• JUNE 1988
NEW AND REVISED PROJECTS
NEW AND REVISED HATCH AND STATE PROJECTS

A Plant Root Warmer For Studying Phytophagous Insect Development And Fecundity At Temperatures Below Host Plant Tolerance, D. H. Akey, G. D. Butler, J. W. Radin

Entomology Papers from Other Sources

A simple root-warming device maintains the plants' roots at a higher temperature than that at which the rest of the plant is held. This permits the host plant to retain turgor, not wilt, and therefore remain suitable for and attractive to phytophagous insects. The technique was demonstrated in a development and fecundity test using the cotton aphid, Aphis gossypii Glover, reared on cotton seedlings, Gossypium hirsutum L., at foliar temperatures of 10.0 and 12.5°C. Root temperatures were held at 20°C. The device was also tested at a foliar temperature of 7.5°C in an additional fecundity test. In a control test, …

Animal Science Newsletter, Fall 1988

Department of Animal Science: Departmental News

Contents:

Animal Science Building Dedication and Open House
Thanks for Support
New Faculty
Recipients of Awards
Graduate Student Recognition
Deaths in the Animal Science Family
Faculty Retirements
Enrollment Trends
New Programs in the Department
Alumni News
Block and Bridle Club
Judging Teams Have A Successful Year
Reception/Brunch for Dr. Ernie R. Peo, Jr. Recognition of His Retirement

Animal Science Newsletter, Fall 1988

Department of Animal Science: Departmental News

Contents:

Animal Science Building Dedication and Open House
Thanks for Support
New Faculty
Recipients of Awards
Graduate Student Recognition
Deaths in the Animal Science Family
Faculty Retirements
Enrollment Trends
New Programs in the Department
Alumni News
Block and Bridle Club
Judging Teams Have A Successful Year
Reception/Brunch for Dr. Ernie R. Peo, Jr. Recognition of His Retirement

Heritabilities Of And Genetic Correlations Among Six Health Problems In Holstein Cows, H. K. Lin, P. A. Oltenacu, L. Dale Van Vleck, H. N. Erb, R. D. Smith

Department of Animal Science: Faculty Publications

Information from 7712 lactations of Holstein dairy cows was collected from 33 commercial herds around Ithaca, NY in the 3 yr from 1981 to 1983. The data were divided into subsets corresponding to lactation 1, lactation 2, and lactation 3 or greater. To estimate heritabilities of dystocia, retained placenta, metritis, ovarian cysts, milk fever, and mastitis, a mixed linear model (herd-year fixed and sire random effects) with 0 or 1 as the observed response was used. Variance components were estimated using Henderson's Method 3. The results show moderate heritabilities (.15 to .40) for dystocia, metritis, milk fever, and mastiffs and …

Wpa News 21 (1988), World Pheasant Association

Galliformes Specialist Group and Affiliated Societies: Newsletters

WPA News (August 1988), number 21

Published by the World Pheasant Association

Identification Of Learning Styles Strategies Which Enable College Students With Differing Personality Temperaments To Cope With Learning Blocks, Gholam Hossein Zamani Zarghani

Department of Agricultural Leadership, Education, and Communication: Dissertations, Theses, and Student Research

The purpose of this study was to identify the major coping strategies which college students with different personality temperament used to deal with their learning blocks. Students' temperament type was obtained from the pool of the Myers-Briggs Type Indicator results available at the Agricultural College, UN-L. An instrument measuring learning blocks was designed and administered in the Fall, 1987. The Coping strategy Inventory (CSI) was developed and administered in the spring, 1988. One hundred and twenty seven agricultural college students responded to the first phase of the study, and 230 agricultural college students took the CSI. The Statistical package for …

Agricultural Experiment Station News July 1988

Agricultural Research Division: News and Annual Reports

CONTENTS:
GARDNER RECEIVES USDA DISTINGUISHED SERVICE AWARD
GRADUATE STUDENT RECRUITMENT TRAVEL FUND
INTERDISCIPLINARY RESEARCH PROJECT FUNDED
NEW PROFESSIONAL TRAVEL ACCOUNT NUMBER
ARD ADVISORY COUNCIL NOTES AND ELECTION RESULTS
NEW FACULTY ORIENTATION
INTERNATIONAL TRAVEL AWARDS
HARDIN DISTINGUISHED GRADUATE FELLOWSHIP
SCHNEIDER RECEIVES RESEARCH COUNCIL GRANT-IN-AID
WHERE DOES NEBRASKA RANK IN AGRICULTURE?
WIDAMAN AWARDS
PROMOTIONS EFFECTIVE JULY 1. 1918
TRANSFER
NEW AND REVISED CSRS PROJECTS
APPOINTMENTS
RESEARCH GRANTS AND CONTRACTS RECEIVED MAY 1988
THE AMERICAN FARMER

Agricultural Research Division 102nd Annual Report, July 1, 1987, To June 30, 1988

Agricultural Research Division: News and Annual Reports

It is a pleasure to provide the 102nd Annual Report of the UNL Agricultural Research Division. This report contains lists of current faculty, active projects, referred journal articles, books and book chapters, germplasm releases, patents, brief descriptions of research in selected areas, and the financial report for the period of July 1, 1987, through June 30, 1988. This report was compiled in compliance with the intent of the law of the State of Nebraska that established the Nebraska Agricultural Experiment Station on March 31, 1887.

Foreword ... v

Administrative Personnel ... vii

Administrative Units ... viii

Organizational Chart ... viii …

Insect, Plant Disease, And Weed Science News, No. 88-10, May 27, 1988, Alex Martin, Bob N. Stougarrd

Insect, Plant Disease, and Weed Science News (1987-1992)

In This Issue:

• Herbicide Injury-Replant?
• Yellow Nutseoge Control in Turf
• Delayed Preemergence Herbicides

Herbicide Injury-Replant?

There is some risk of crop 1nJury with the use of any herbicide. Certain herbicides are more likely to injure crops than others. Reasons for herbicide injury include incorrect application rate, nonuniform application (overlapping), herbicide carryover, incorrect choice of herbicide for the situation, unfavorable weather conditions, spray drift, etc.

Yellow Nutsedge Control in Turf

Yellow nutsedge is one of the most troublesome weeds in lawns. Basagran is the safest and most effective herbicide for yellow nutsedge control. Mix 1 oz./gal of water along with an …

A Sociobiological Perspective On The Development Of Human Reproductive Strategies, Patricia Draper, Henry Harpending

Department of Anthropology: Faculty Publications

Humans show a great deal of variability in their reproductive behavior, including types of sexual activity, types of ties between males and females, and ways of arranging for the rearing of offspring. We will consider three principal topics: (1) Father absence versus father presence, contrasting children who are reared in a family system in which there is a closely involved and economically contributing father in contrast to a family system in which women rear their children in cooperation with other women (usually kin) and without consistent help from a man who is father to children. (2) Peer rearing versus parent …

Science Concepts Taught In Secondary Vocational Agriculture Programs As Perceived By Nebraska Secondary Vocational Agriculture And Science Instructors, Thomas L. Sabata

Department of Agricultural Leadership, Education, and Communication: Dissertations, Theses, and Student Research

The study was conducted to identify the science concepts taught in the vocational agriculture curriculum which are the same as science concepts considered necessary in the secondary science curriculum in Nebraska, as perceived by 33 vocational agriculture instructors and science instructors in earth science (24), biology (30), physics (28) and chemistry (28). A mail survey was used to collect data for the study. The survey return rate for the vocational agriculture teachers was 75 percent; while science teacher returns were lower (54.5 to 68.2%). Science concepts were rated on a scale of 1 to 5 of importance for students to …

Animal Sciences Into The 21st Century

Department of Animal Science: Departmental News

Life in Nebraska has always been closely tied to the land and its products. The animal resources of this state feed people throughout the world, and future findings in the animal industry can impact every person on earth. It is with this vision of service to the community, both local and global, that the University of Nebraska – Lincoln has provided a continually expanding Department of Animal Science. Educating young Nebraskans in all phases of the animal production cycle and researching ways to improve the animal industry have been a growing part of UNL’s academic life for nearly 100 years. …

Prolonged Seed Handling Time Deters Red-Winged Blackbirds Feeding On Rice Seed, Dennis Daneke, David G. Decker

Vertebrate Pest Conference Proceedings: 13th (1988)

Theoretical concepts from foraging ecology were studied to identify elements of blackbird foraging strategies that may be manipulated to deter blackbirds feeding on rice. Seed-handling time was identified as one such vulnerable element. Consequently, we developed seed coatings for rice that increased handling time per seed, allowed a satisfactory germination rate, and persisted for several days postplanting. Test coats included hydrophilic binders with several starches, clays, plaster of paris and chemical grout in various combinations. Consistent repellency was achieved in feeding trials with captive red-winged blackbirds.

Characteristics Of Bird-Resistance In Agricultural Crops , Roger W. Bullard

Vertebrate Pest Conference Proceedings: 13th (1988)

The use of biochemical or morphological genetic traits in a crop to protect ripening seeds or grain from bird damage remains a promising tool under certain situations. Research on bird-resistance in crops has focused on grain sorghum, corn, sunflower and rice. This crop protection method involves feeding behavior of granivorous birds and its effectiveness depends on the availability of preferred alternate foods. That is, bird-resistant traits provide protection to the crop when other food choices are readily available; however, when alternate food is scarce or high bird populations create serious feeding competition, they are less effective. Several practical factors (i.e., …

The Status Of The Names Clytus Horridus Leconte And Clytus Leucozonus Castelnau & Gory (Coleoptera: Cerambycidae), Richard L. Hoffman

Insecta Mundi

Much of the confusion that has plagued the two species considered here originated from the failure of previous authors to examine pertinent type material. I made a special effort to examine types of as many names as readily available, and in addition appealed to a number of museums and individuals for the loan of (or information about) material of horridus and muricatulus in order to account for the range and variation of these taxa. C. horridus, although widely distributed, is by no means common and many - even large - collections have few if any specimens of it.

Material …

Frugivorous And Animalivorous Bats (Microchiroptera): Dental And Cranial Adaptations, Patricia W. Freeman

University of Nebraska State Museum: Mammalogy Papers

The most derived fruit-eating bats have small canines, wide palates and molars with a distinctive labial rim. Paracone and metacone have moved from a dilambdodont position in the middle of the tooth to the labial side of the tooth where they form the labial cutting edge. Along with the well-developed and close fitting labial cutting edges of the premolars and canines, this cutting edge skirts nearly the entire perimeter of the palate. The labial rim of the lower teeth fit inside the labial rim of the upper teeth like two cookie cutters nesting one inside the other. Frugivores have a …

Analysis Of The Virulence Of Streptococcus Mutans Serotype C Gtfa Mutants In The Rat Model System, Raul G. Barletta, Suzanne M. Michalek, Roy Curtis Iii

School of Veterinary and Biomedical Sciences: Faculty Publications

The Streptococcus mutans serotype c gtfA gene encodes a 55-kilodalton protein which catalyzes the synthesis of a small glucan (1.5 kilodaltons) from sucrose (J. P. Robeson, R. G. Barletta, and R. Curtiss III, J. Bacteriol. 153:211-221, 1983). To investigate the role of the GtfA enzyme in virulence, we constructed S. mutans gtfA mutants from three cariogenic serotype c strains. A plasmid that carried an erythromycin resistance determinant and an internal fragment of the gtfA gene but that was unable to replicate in streptococci was used to transform S. mutans. The erythromycin-resistant transformants carried a partial duplication of the internal …

Ec88-210 Revised Swine Diet Suggestions, Duane E. Reece, Earnest R. Peo Jr., Donald G. Levis

University of Nebraska-Lincoln Extension: Historical Materials

Extension circular 88-210 Revised contains swine diet suggestions.

Anabolic Steroids And Implants In Feedlot Steers, Bruce B. Schanbacher, John Brethour

Roman L. Hruska U.S. Meat Animal Research Center: Reports

Profit from livestock production is affected by daily liveweight gain, cost of gain, and feed conversion efficiency. Young beef calves are recognized as suitable converters of forages and grains into wholesome red meat, but constraints to maximum production efficiency are recognized. While their growth and development are often discussed in light of genetic potential, nutritional requirements, and environmental constraints, administration of anabolic agents to maximize their gains is a common practice. Several implants are available to the cattle industry as growth promotants; some of these contain steroids of gonadal origin while others are nonsteroidal.

Steroids secreted by the testes are …

Current Concepts For Understanding Ovarian Follicular Growth And Function In Cattle, Leon J. Spicer, Sherrill E. Echternkamp

Roman L. Hruska U.S. Meat Animal Research Center: Reports

Ovarian follicular development in cattle during either the estrous cycle or postpartum anestrus is not presently well understood. Although several investigators have suggested that follicular development is continuous, the notion that follicular growth occurs in waves still persists. A better understanding of bovine folliculogenesis is required to solve beef production problems such as prolonged postpartum infertility and variable responses to superovulation and estrous synchronization treatments. Therefore, research was conducted at U.S. Meat Animal Research Centerand results compared with earlier studies to explain follicular growth and function in cattle during postpartum anestrus.