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Articles 2401 - 2430 of 2597

Full-Text Articles in Agricultural Science

Comparative Attraction Of Four Different Fiberglass Traps To Various Age And Sex Classes Of Stable Fly (Diptera: Muscidae) Adults, Jerome Hogsette, Joseph Ruff Jan 1990

Comparative Attraction Of Four Different Fiberglass Traps To Various Age And Sex Classes Of Stable Fly (Diptera: Muscidae) Adults, Jerome Hogsette, Joseph Ruff

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

An Alsynite cylinder trap and three different Williams cross-configuration traps with three adhesives were compared to determine their relative attraction to stable fly, Stomoxys calcitrans (L.), adults. Williams traps coated with Olson Sticky Stuff performed as well as Williams traps coated with Tack Trap, thus allowing fly samples collected with either adhesive to be compared. The cylinder trap captured fewer total flies,but more flies per cm2 than any of the Williams traps. Sex ratio of flies captured on the cylinder trap was 50:50, while the three Williams traps captured predominantly males. The cylinder trap captured a larger percentage of …

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Concentrations Of Insulin-Like Growth Factor-I In Blood And Ovarian Follicular Fluid Of Cattle Selected For Twins, S. E. Echternkamp, L. J. Spicer, K. E. Gregory, S. F. Canning, J. M. Hammond Jan 1990

Concentrations Of Insulin-Like Growth Factor-I In Blood And Ovarian Follicular Fluid Of Cattle Selected For Twins, S. E. Echternkamp, L. J. Spicer, K. E. Gregory, S. F. Canning, J. M. Hammond

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

Recent studies have implicated insulin-like growth factor I (IGF-I) as an intraovarian regulator of follicular growth and differentiation. Therefore, we investigated the possibility that cattle selected for twin births may have increased concentrations of IGF-I within the ovarian follicle and(or) in peripheral blood. The estrous cycles of 14 cows with histories of producing twins and 12 control monotocous cows were synchronized with 35 mg of prostaglandin F2α (PGF2α). Blood and follicular fluid were collected 48-50 h post-administration of PGF2α. (follicular phase of the estrous cycle). Concentrations of IGF-I were measured by RJA after acid-ethanol treatment …

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Concentrations Of Insulin-Like Growth Factor-I In Blood And Ovarian Follicular Fluid Of Cattle Selected For Twins, S. E. Echternkamp, L. J. Spicer, K. E. Gregory, S. F. Canning, J. M. Hammond Jan 1990

Concentrations Of Insulin-Like Growth Factor-I In Blood And Ovarian Follicular Fluid Of Cattle Selected For Twins, S. E. Echternkamp, L. J. Spicer, K. E. Gregory, S. F. Canning, J. M. Hammond

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

Recent studies have implicated insulin-like growth factor I (IGF-I) as an intraovarian regulator of follicular growth and differentiation. Therefore, we investigated the possibility that cattle selected for twin births may have increased concentrations of IGF-I within the ovarian follicle and(or) in peripheral blood. The estrous cycles of 14 cows with histories of producing twins and 12 control monotocous cows were synchronized with 35 mg of prostaglandin F2a (PGF2a). Blood and follicular fluid were collected 48-50 h post-administration of PGF2a (follicular phase of the estrous cycle). Concentrations of IGF-I were measured by RJA after acid.ethanol treatment of …

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Evaluation Of Seeding Rates Of Au Triumph And Endophyte-Infected Kentucky 31 Tall Fescue, Jeffrey F. Pedersen, D. M. Ball Jan 1990

Evaluation Of Seeding Rates Of Au Triumph And Endophyte-Infected Kentucky 31 Tall Fescue, Jeffrey F. Pedersen, D. M. Ball

Department of Agronomy and Horticulture: Faculty Publications

Increased difficulty in stand establishment of tall fescue (Festuca arundinacea Schreb.) has been reported by producers since the introduction of endophyte (Acremonium coenophialum Morgan Jones and Gams)-free tall fescue seed into the market place. This has encouraged the use of higher seeding rates for endophyte-free tall fescue without scientific basis. The objective of this study was to determine whether ‘AU Triumph’, and endophyte-free cultivar, and endophyte-infected ‘Kentucky 31’ differ in minimum seeding rates for successful establishment. Experiments were established at two locations in each of two years, using a randomized complete block with four replications. Soils at the two locations …

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Heritability Of Root Characteristics Affecting Mineral Uptake In Tall Fescue, J. H. Edwards, Jeffrey F. Pedersen, R. C. Kingery Jan 1990

Heritability Of Root Characteristics Affecting Mineral Uptake In Tall Fescue, J. H. Edwards, Jeffrey F. Pedersen, R. C. Kingery

Department of Agronomy and Horticulture: Faculty Publications

Modification of plant roots can potentially increase the area. of adaptation of tall fescue (Festuca arundinacea Schreb.). Limited information is available on the heritability of root diameter and root volume in tall fescue. A greenhouse experiment was conducted with'50 random 'Kentucky 31' (Ky-31) tall fescue parents and their progeny grown in aerated nutrient solution during four separate time intervals. Measurements of root volume, root diameter, shoot Mg concentration, and shoot K/(Mg + Ca) ratio were made six weeks after clonal material was transplanted in nutrient solution. Heritability estimates for root volume, root diameter, shoot Mg concentration, and shoot K/(Mg …

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A Review Of The Agronomic Characteristics Of Endophyte-Free And Endophyte-Infected Tall Fescue, Jeffrey F. Pedersen, G. D. Lacefield, D. M. Ball Jan 1990

A Review Of The Agronomic Characteristics Of Endophyte-Free And Endophyte-Infected Tall Fescue, Jeffrey F. Pedersen, G. D. Lacefield, D. M. Ball

Department of Agronomy and Horticulture: Faculty Publications

Agronomic differences between endophyte- (Acremonium coenophialum Morgan Jones and Gams) free and endophyte-infected tall fescue (Festuca arundinacea Schreb.) exist, and should be considered when implementing a management strategy. Although dry matter yield of tall fescue does not generally appear to be influenced by endophyte infection status, endophyte infection has been shown to improve seedling performance and survival, is associated with insect and nematode resistance, drought resistance, improved nitrogen assimilation, and higher seed set. Considering all biologically valuable characters of the endophyte-tall fescue relationship, survival of endophyte-infected tall fescue is probably better than that of endophyte-free tall fescue, especially in drought- …

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Fescues With Large Roots Are Drought Tolerant, H. A. Torbert, J. H. Edwards, Jeffrey F. Pedersen Jan 1990

Fescues With Large Roots Are Drought Tolerant, H. A. Torbert, J. H. Edwards, Jeffrey F. Pedersen

Department of Agronomy and Horticulture: Faculty Publications

Consideration of root/soil interactions is essential in, adapting tall fescue (Festuca arundinacea Schreb.) to soil and climatic conditions of the Coastal Plain region of the southeast. Sandy soils of the region are very susceptible to the formation of hardpans. These compacted layers often restrict plant root development to the plow layer (0 to 6 in.) and prevent plant roots from reaching available moisture and nutrients in the subsoil horizons. Plants grown under these conditions are shallow rooted and will be subjected to water stress up to 50% of the time during the growing season. Although implements are available to penetrate …

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Leafy Spurge: Threat To Central Plains Grasslands, Robert A. Masters Jan 1990

Leafy Spurge: Threat To Central Plains Grasslands, Robert A. Masters

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

Leafy spurge (Euphorbia esula L.) is a noxious weed that threatens grasslands in the central and northern Great Plains and the prairie provinces of Canada. Leafy spurge threatens prairie communities by displacing native species and reducing species diversity. Effective management of this undesirable plant requires that one be able to identify leafy spurge, understand the characteristics that contribute to its aggressive habit, and be aware of practices that are available to control this noxious weed. The aggressive habit of leafy spurge is related to its ability to reproduce both by seed and by numerous adventitious shoot buds located along …

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Tillage And Fertilizer Influences On Corn And Legume Cover, J. E. Gilley, J. F. Power, P. J. Reznicek, S. C. Finkner Dec 1989

Tillage And Fertilizer Influences On Corn And Legume Cover, J. E. Gilley, J. F. Power, P. J. Reznicek, S. C. Finkner

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

The use of legumes in a cropping system may provide a variety of benefits. In this study, the effectiveness of selected legume species in providing surface cover was examined. The legumes were interseeded into either conventional or no-till corn, with or without N fertilizer. Both maximum legume cover and maximum cover furnished by corn plus legumes were examined. Mean cover provided during the study period by both the cover crop, and corn plus cover crop was also determined.

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Soil Disturbance-Residue Management Effect On Winter Wheat Growth And Yield, Wallace Wilhelm, H. Bouzerzour, J. F. Power Nov 1989

Soil Disturbance-Residue Management Effect On Winter Wheat Growth And Yield, Wallace Wilhelm, H. Bouzerzour, J. F. Power

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

The need to reduce soil erosion, maximize soil water conservation, and optimize grain production in dryland cropping systems in the Central Great Plains has culminated in development of nontilled fallow systems. These systems have greatly reduced the degree of soil disturbance, and the amount and degree of residue incorporation. The objectives of this study were to evaluate the influence of soil disturbance and residue management on soil temperature, soil water, and winter wheat (Triticum aestivum L.) growth. Two field studies were established in 1981 and 1982 on an Alliance silt loam (Fine-silty, mixed, mesic Aridic Argiustoll) with treatments consisting …

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Can Genetically Engineered Crops Become Weeds?, Kathleen H. Keeler Nov 1989

Can Genetically Engineered Crops Become Weeds?, Kathleen H. Keeler

School of Biological Sciences: Faculty Publications

There are significant differences if the distribution of weedy characteristics among weeds, normal plants, and crops. The world’s most serious weeds possess on the average 10 or 11 of these characters, a random collection of British plants have an average seven of the traits, and crop plants only five. For the average crop to become as “weedy” as the average weed, it would need to acquire five weedy traits. Even using the unlikely assumption that those traits are single loci in which a dominant mutation would provide the weedy character, this would require the simultaneous acquisition of five gene substitutions. …

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Farming Systems Research/Extension And The Concepts Of Sustainability, Charles A. Francis, Peter E. Hildebrand Jan 1989

Farming Systems Research/Extension And The Concepts Of Sustainability, Charles A. Francis, Peter E. Hildebrand

Department of Agronomy and Horticulture: Faculty Publications

Farming Systems Research and Extension (FSR/E) has strongly influenced the direction of agricultural development over the past two decades. Involving farmers, change agents and researchers, this participatory approach to technological improvement has evolved as an efficient means to develop individual components and more integrated systems that are uniquely suited to specific biophysical and socioeconomic conditions. Farmers with similar conditions and for whom specific recommendations are appropriate are grouped, in FSR/E, into identifiable Recommendation Domains. The technologies recommended conform with the biophysical and socioeconomic constraints that create environments within the domains, based on the philosophy that new technologies must conform with …

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Concetta Tm (Papconc) C.V. (Rose Plant), Ellen T. Paparozzi Jan 1989

Concetta Tm (Papconc) C.V. (Rose Plant), Ellen T. Paparozzi

Department of Agronomy and Horticulture: Faculty Publications

A new and distinct variety of rose plant of the hybrid tea rose class, which was originated as a sport of the rose Gabriella; characterized by its bright orange red, well-formed hybrid tea type blooms with dark velvet overtones on the outer edges of the open flower; disease resistant with everblooming habit and outstanding pot forcing characteristics.

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Immune, Growth And Carcass Responses Of Ram Lambs To Active Immunization Against Desulfated Cholecystokinin (Cck-8), W. E. Trout, J. C. Pekas, B. D. Schanbacher Jan 1989

Immune, Growth And Carcass Responses Of Ram Lambs To Active Immunization Against Desulfated Cholecystokinin (Cck-8), W. E. Trout, J. C. Pekas, B. D. Schanbacher

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

This study explored feed intake and carcass responses to active immunization against desulfated cholecystokinin-octapeptide (CCK-8) in ram lambs. Antibody titers 8 wk following primary immunization and booster immunizations given at 4 and 6 wk averaged greater than 1:1,000. Titers increased to greater than 1:10,000 by 16 wk following a final booster immunization at 11 wk. The antibodies developed against desulfated CCK-8 exhibited 29% and 13% cross-reactivities for sulfated CCK-8 and gastrin-17, respectively. Immunization against desulfated CCK-8 had no effect on feed intake, ADG, carcass weight or carcass quality grade. Backfat thickness and carcass yield grade were reduced (P < .05) by immunization. Organ weights at slaughter, including those of the pancreas and small intestines, were not affected by CCK-8 immunization, with the exception of the lungs, which were 16% lighter (P < .01) in immunized lambs. In conclusion, active immunization against desulfated CCK-8 resulted in development of high antibody titers against desulfated and sulfated CCK-8. Immunization against CCK-8 decreased fat content of the carcass but failed to affect feed intake, carcass weight or ADG.

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Winter Wheat Growth In Artificially Compacted Soil, Wallace Wilhelm, L. N. Mielke Aug 1988

Winter Wheat Growth In Artificially Compacted Soil, Wallace Wilhelm, L. N. Mielke

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

Dense soil tillage pans can develop from the improper use of tillage tools. The influence of compacted layers or pans on plant growth and development, although much studied, is not clearly understood. This greenhouse experiment evaluated the influence of uniformly compacted soil and thin layers of compacted soil placed at various depths on early growth of winter wheat (Triticum aestivum L.). Artificially compacted soil [Alliance silt loam, Aridic Argiustoll (Eluviated Brown Chernozem); A horizon] profiles were constructed in polyvinyl chloride tubes of 150-mm diameter by 350 mm long. Treatments were: (1) uniformly noncompacted (bulk density 1.30 Mg m-3) …

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Male Sterility In Soybean-An Overview, Robert Graybosch, Reid G. Palmer Jan 1988

Male Sterility In Soybean-An Overview, Robert Graybosch, Reid G. Palmer

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

The most common type of reproductive mutations observed in the soybean [Glycine max (L.) Merr.]are those that induce male sterility.The high frequency of occurrence of male-sterile mutations indicates that a number of genes influence the processes of microgametogenesis and microsporogenesis. The current knowledge of these mutations is summarized. The origins of male-sterile mutations, their inheritance patterns, and known linkage relationships are detailed. The phenotypic expression of male-sterile mutations, including their effects on both male and female reproduction, is discussed. The influence of environment on the expressivity of male sterile mutations, and the effects of male-sterile mutations on physiological processes …

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Duration Of Fertility Of Turkeys Inseminated At Different Times After The Onset Of Photostimulation, M. R. Bakst Jan 1988

Duration Of Fertility Of Turkeys Inseminated At Different Times After The Onset Of Photostimulation, M. R. Bakst

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

To investigate the relationship between photostimulation, ovary and oviduct weights, and oviducal sperm-storage tubule (SST) development and functional capacity, 33-week-old turkey hens were placed in four groups of 15 hens each. Each group was inseminated three times in 30 min with 50 × 106 spermatozoa (a total of 150 × 106 spermatozoa) on the day of photostimulation, or on Days 7, 14, or 21 after the onset of photostimulation (Groups A, B, C and D, respectively). From weeks 4 to 8 after photostimulation, 5 additional hens were inseminated each week and then killed 24 h later to determine …

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Considerations In Breeding Endophyte-Free Tall Fescue Forage Cultivars, Jeffrey F. Pedersen, D. A. Sleper Jan 1988

Considerations In Breeding Endophyte-Free Tall Fescue Forage Cultivars, Jeffrey F. Pedersen, D. A. Sleper

Department of Agronomy and Horticulture: Faculty Publications

Breeding tall fescue (Festuca arundinacea Schreb.) cultivars that are free of the endophytic fungus Acremonium coenophialum Morgan-Jones and Gams [previously identified and referred to as Epichloe typhina (Fries) Tulasne] is necessary to improve animal performance. The techniques used in developing new cultivars are not greatly different from those used previously, with one exception. Prior to the evaluation of new tall fescue lines or populations, the endophyte needs to be eliminated from the seed or the plants. Several techniques utilizing aging, heat, or chemical treatment are being used to effectively accomplish this in the seed. Methods for permanently eliminating the endophyte …

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Levels And Timing Of Nitrogen Fertilizer Applications For Tall Fescue In Central Alabama, J. W. Odom, Jeffrey F. Pedersen Jan 1988

Levels And Timing Of Nitrogen Fertilizer Applications For Tall Fescue In Central Alabama, J. W. Odom, Jeffrey F. Pedersen

Department of Agronomy and Horticulture: Faculty Publications

Tall fescue (Festuca arundinacea Schreb.), the most important cool season perennial pasture grass in the United States, is generally well adapted to the northern two-thirds of Alabama. Unfortunately, the most commonly grown tall fescue cultivar, Kentucky 31, is of northern origin and is dormant during the winter. To reduce this problem, AU Triumph was selected from Mediterranean germplasm. The Alabama Agricultural Experiment Station released this cultivar to growers in 1981. Compared to Kentucky 31, AU Triumph produces about 80 percent more forage during the winter and produces mature seed about 2 weeks earlier in the spring. Total annual forage production …

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Suggestions Regarding Alcoholic Bird Collections, Peter F. Cannell, Murray R. Bakst, Cheryl S. Asa Jan 1988

Suggestions Regarding Alcoholic Bird Collections, Peter F. Cannell, Murray R. Bakst, Cheryl S. Asa

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

One third of the known species of birds are unrepresented in alcoholic collections and nearly 70% of the rest are represented by 10 or fewer specimens (Wood et al. 1982, Zusi et al. 1982). Simply put, "existing anatomical specimens do not meet present and future research needs and . .. the situation must be corrected" (Jenkinson and Wood 1985:587). Actually, current alcoholic specimen resources may be even worse than indicated by Wood et al. (1982), despite commendable recent improvements. Here, we argue the urgent need for additional alcoholic specimens, stressing in particular quality of fixation, the importance of series, documentation …

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Turkey Hen Fertility And Egg Production After Artificial Insemination And Multiple Oviduct Eversion During The Pre-Laying Period, M. R. Bakst Jan 1988

Turkey Hen Fertility And Egg Production After Artificial Insemination And Multiple Oviduct Eversion During The Pre-Laying Period, M. R. Bakst

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

The onset of egg production (mean 18 · 3 days after the onset of photostimulation) and the rate of egg production (flock averaged 4 · 9 eggs per bird per week for the first 8 weeks of egg production) were not affected by 5 days of twice daily oviduct eversion ('venting') in the pre-laying period when compared to unvented controls. After the onset of photostimulation, pre-laying hens were inseminated twice daily on Days 12 to 16 with 3 μl semen containing 15 × 106 spermatozoa, and compared with groups of hens inseminated once daily on Days 15 and 16 with …

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Isolation And Identification Of The Major Component Of Setal Exudate From Corythucha Ciliate, William Lusby, James Oliver, John W. Neal Jr., Robert Heath Dec 1987

Isolation And Identification Of The Major Component Of Setal Exudate From Corythucha Ciliate, William Lusby, James Oliver, John W. Neal Jr., Robert Heath

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

Clear microdroplets are associated with secretory, abdominal setae on nymphs of the sycamore lace bug Corythucha ciliata. The major component of this exudate material has been identified as 3,6-dihydroxy-2-[1-oxo- lO(E)-terradecenyl]cyclohex-2-en- 1-one [1]. Preliminary observations of these insects suggest a defensive function for these exudate droplets.

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Conservation Tillage And Irrigation Effects On Corn Root Development, R. L. Newell, Wallace Wilhelm Nov 1987

Conservation Tillage And Irrigation Effects On Corn Root Development, R. L. Newell, Wallace Wilhelm

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

The effects of conservation-tillage practices on the root environment of corn (Zea mays L.) may differ with varying amounts of irrigation. Dryland, 50% irrigation, and 100% irrigation treatments were applied in combination with disc, no-tillage, and a postemergence chisel treatment designed to allow rapid infiltration of irrigation water. The study was conducted during the 1980 growing season at the Nebraska Agricultural Experiment Station near Mead, NE, on a Sharpsburg silty clay loam (fine, montmorillonitic, mesic Typic Argiudolls). Root samples were taken to 1.50 m in 0.15-m increments. Sampling was done at 60 (V8), 77 (V14), and 90 (R2) days …

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Dryland Maize Development And Yield Resulting From Tillage And Nitrogen Fertilization Practices, Wallace Wilhelm, James S. Schepers, M. L. Mielke, John W. Doran, James R. Ellis, Walter W. Stroup Jun 1987

Dryland Maize Development And Yield Resulting From Tillage And Nitrogen Fertilization Practices, Wallace Wilhelm, James S. Schepers, M. L. Mielke, John W. Doran, James R. Ellis, Walter W. Stroup

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

Conservation tillage ( 7 30% residue cover) has proven to be very effective in reducing runoff and erosion and in increasing soil water storage. In dryland cropping situations, the latter fact should result in a greater yield potential for conservation than for conventional tillage. In practice, however, this theoretical advantage has not consistently realized. The objective of this study was to determine the influence of tillage and N-fertilization management on growth and yield of maize (Zea mays L.) under dryland conditions in the western Corn Belt (U.S.A.). The experiment was conducted from 1977 through 1983 on a Crete-Butler silty …

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Effects Of Planting Date On Development Of Net Blotch Epidemics In Winter Barley In Pennsylvania, Leslie M. Delserone, H. Cole Jr. May 1987

Effects Of Planting Date On Development Of Net Blotch Epidemics In Winter Barley In Pennsylvania, Leslie M. Delserone, H. Cole Jr.

University of Nebraska-Lincoln Libraries: Faculty Publications

The influence of planting date on fall and spring net blotch epidemics (caused by Pyrenophora teres) was evaluated with the winter barley cultivar Pennrad. Experiments were conducted in Centre County, Pennsylvania, in 1982 and 1983 and in Lancaster County, Pennsylvania, in 1983. The three planting dates evaluated corresponded to the recommended date as well as dates I wk earlier and later than recommended for each specific location. Planting date had a significant influence on fall net blotch epidemics, with the greatest and least disease severities observed in the earliest and latest plantings, respectively. When spring environmental conditions were warm …

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Intsormil Annual Report 1987, John M. Yohe, Timothy T. Schilling Jan 1987

Intsormil Annual Report 1987, John M. Yohe, Timothy T. Schilling

INTSORMIL Impacts and Bulletins

The Sorghum/Millet CRSP was initiated on July 1, 1979. This annual report covers the activities for program Year 8. Eight years of experience have reaffirmed the need for this type of research program aimed at relieving the constraints to improved sustainable sorghum/millet production in developing countries. The emphasis by the CRSP on development of collaborative linkages with national sorghum/millet research programs has been unique. Significant contributions have been made toward resolving constraint problems and enhancing the national program capability by strengthening its human resource base as well as the national institutional capability to conduct collaborative research. Thus, the CRSPs present …

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Short Communications: Localization Of Oviductal Sperm-Storage Tubules In The American Kestrel (Falco Sparverius), Murray R. Bakst, David M. Bird Jan 1987

Short Communications: Localization Of Oviductal Sperm-Storage Tubules In The American Kestrel (Falco Sparverius), Murray R. Bakst, David M. Bird

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

Sperm-storage tubules (SST) are discrete tubular invaginations of the bird's oviduct epithelium located in the anterior end of the vaginal folds, a region generally referred to as the uterovaginal junction (UVJ). [We prefer to refer to the UVJ sperm-storage sites collectively as the SST (originally used by Mero and Ogasawara 1970) because SST accurately describes their function and structure.] Of the 27 recognized orders of birds, SST have been identified histologically only in selected species of Charadriiformes and Procellariformes (Hatch 1983), Galliformes (Fujii and Tamura 1963), Anseriformes (Pal 1977), and Passeriformes (Bray et al. 1975). Whether SST are structures common …

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Growth And Carcass Traits Of Heifers As Affected By Hormonal Treatment, J. D. Crouse, B. D. Schanbacher, H. R. Cross, S. C. Seideman, S. B. Smith Jan 1987

Growth And Carcass Traits Of Heifers As Affected By Hormonal Treatment, J. D. Crouse, B. D. Schanbacher, H. R. Cross, S. C. Seideman, S. B. Smith

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

Seventy-seven tleifers weighing about 200 kg were assigned randomly to 1) intact control (C), 2) ovariectomized (OVX), 3) immunized against estradiol (BSA-E), 4) BSA-E + trenbolone acetate (BSA-E+TBA), 5) TBA or 6) ovx + TBA groups. The objective of the study was to determine the effects of ovariectomy, immunoneutralization of estradiol and trenbolone acetate treatment on growth rate and carcass merit. Heifers were fed a corn-corn silage diet and were slaughtered when treatment groups attained live-animal weights of 433 kg. Observations of rate of growth, efficiency of feed conversion, characteristics of carcasses and characteristics of organoleptic properties of the cooked …

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Lipogenesis In Adipose Tissue From Ovariectomized And Intact Heifers Immunized Against Estradiol And(Or) Implanted With Trenbolone Acetate, L. C. St. John, P. A. Ekeren, J. D. Crouse, B. D. Schanbacher, S. B. Smith Jan 1987

Lipogenesis In Adipose Tissue From Ovariectomized And Intact Heifers Immunized Against Estradiol And(Or) Implanted With Trenbolone Acetate, L. C. St. John, P. A. Ekeren, J. D. Crouse, B. D. Schanbacher, S. B. Smith

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

Forty-two heifers were allotted randomly to six treatment groups: 1) intact controls, 2) intact heifers implanted with trenbolone acetate, 3) ovariectomized heifers, 4) ovariectomized heifers implanted with trenbolone acetate, 5) intact heifers immunized against estradiol and 6) intact heifers immunized against estradiol and implanted with trenbolone acetate. Blood titers of estradiol-17β were increased over lO0-fold in heifers immunized against estradiol in Freund's complete adjuvant or saline:squalene/arlacel containing Mycobacterium. Lipogenic enzyme activities and acetate incorporation into fatty acids were increased in subcutaneous adipose tissue obtained at slaughter from heifers receiving immunization or the combination of immunization and trenbolone acetate. The increased …

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Evaluation Of Repellent Seed Treatments And Effects On Early Corn Performance, Ann E. Koehler, Ron J. Johnson, Orvin C. Burnside, Stephen R. Lowry Jan 1987

Evaluation Of Repellent Seed Treatments And Effects On Early Corn Performance, Ann E. Koehler, Ron J. Johnson, Orvin C. Burnside, Stephen R. Lowry

Department of Agronomy and Horticulture: Faculty Publications

A combination of field, field enclosure, and germination chamber studies was used to evaluate the effects of methiocarb [3,5-dimethyl-4-(methylthio)phenol methylcarbamate] and thiram (tetramethylthiuram disulfide) repellent seed treatments on early corn performance. The thiram treatments used (0.08, 0.4,0.8,0.5,1.25, and 2.5% active ingredient by corn seed weight) had negligible effects on germination/emergence time or on com plant heights. The thiram treatments never reduced stand counts in comparison to controls, but apparently increased stand counts in some trials, particularly under wet conditions. The methiocarb treatments evaluated (0.5, 1.25, 2.5, and 5.0% active ingredient by corn seed weight) had only occasional effects on early …

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