Digital Commons Network^™

G80-510 Sagebrush Control, Robert G. Wilson, Patrick E. Reece

University of Nebraska-Lincoln Extension: Historical Materials

Sagebrush is an all encompassing term commonly used to describe Artemisia species found on range and pasture lands in Nebraska. The dominant woody sagebrush species found in western Nebraska are sand sagebrush, fringed sagebrush, green sagewort, and big sagebrush. These species vary in appearance, distribution and control recommendations. All four species are perennials, have deep extensive root systems and flower in the latter part of the summer. The leaves of sagebrush have a strong odor as a result of camphor like compounds. Palatability and digestibility of sagebrush species found in Nebraska tend to be poor because of high volatile oil …

G80-495 Managing Two-Year-Old Beef Heifers (Calving - Rebreeding), Gene H. Deutscher

University of Nebraska-Lincoln Extension: Historical Materials

This NebGuide discusses the nutrition and management practices recommended for beef heifers during precalving, calving, and early lactation periods. Proper development of replacement heifers has a great influence on the success of calving and rebreeding them as two-year-olds. NebGuide G80-493, Developing Replacement Beef Heifers (Weaning-Breeding), points out that proper selection, adequate nutrition, and judgment in sire selection are all important management factors for developing heifers into high producing cows. With good management before breeding, a high percentage of heifers should be bred early in a short breeding season. Heifers should be pregnancy checked and the open ones culled. Thereafter, the …

Population Regulation In Wolves, Jane M. Packard, L. David Mech

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

The possibility of social regulation of wolf populations has been discussed in the literature for several years. Some of the first ecological studies of wolves indicated that their populations did not increase as rapidly as was theoretically possible, and that they reached a saturation point apparently not set by food. Subsequent captive studies demonstrated the existence of social mechanisms possibly capable of regulating population growth. However, the importance of these factors in wild populations has not been established. This paper has four objectives: (1) to evaluate the existing concept of "intrinsic limitation," (2) to propose that wolf population dynamics may …

G80-489 Feeding The Beef Cow Herd--Part I Factors Affecting The Cow Nutrition Program, Richard J. Rasby, Ivan G. Rush

University of Nebraska-Lincoln Extension: Historical Materials

Considerations for getting the most from your beef cow herd are covered in this NebGuide, including calving season, factors affecting nutrient requirements, cow rations and more.

Feed costs are the greatest expense in keeping a cow herd, and the nutrition program dictates reproductive performance. The ultimate goal for a cow/calf manager is to keep feed costs low, but still meet the nutrient requirements of the cow herd so reproductive performance is not impaired. Once these two factors are balanced, producers, through new genetics of added growth or milk production, can match increased weaning weight with the most economical feed resources …

G80-537 Reproductive Trace Anatomy And Physiology Of The Cow, Gene H. Deutscher

University of Nebraska-Lincoln Extension: Historical Materials

Knowledge of basic reproduction will help a producer to obtain higher conception rates when using estrous synchronization and/or artificial insemination. The reproductive performance of a cow herd has a great influence on the income and profit realized. A good understanding of the anatomy and physiology of the cow's reproductive system is, therefore, beneficial for successful management. Knowledge of basic reproduction will help a producer to obtain higher conception rates when using estrous synchronization and/or artificial insemination. It will also allow for a better understanding of pregnancy examinations, reproductive diseases and calving difficulty problems.

Wheat Straw In Growing Cattle Diets, Gary Lesoing, Ivan G. Rush, Terry Klopfenstein, John Ward

Panhandle Research and Extension Center

Three cattle growth trials were conducted to evaluate the use of untreated and alkali-treated wheat straw as energy sources for ruminants. In trial 1, daily gain decreased as level of untreated wheat straw increased in the diet. A 14% decrease in gain occurred when the level of straw was increased from 30 to 40% of the diet. In trial 2, cattle fed 4% NaOH-treated wheat straw at the 30 or 60% level had better daily gains and feed efficieneies (Pvs. .54 kg/day). In addition, in this trial, cattle fed 50% treated wheat straw gained faster (Pvs. .62 kg/day).

Agricultural Experiment Station News January 1980

Agricultural Research Division: News and Annual Reports

CONTENTS:
FROM THE DIRECTOR'S DESK
PERSONNEL ACTIONS
GRANTS AND CONTRACTS
GENERAL NOTES
NEBRASKA AGRICULTURAL EXPERIMENT STATION PUBLICATIONS - December 1979
BULLETINS PRINTED

Animal Science Newsletter, Winter 1980

Department of Animal Science: Departmental News

Contents:

1980 Animal Science Reunion Successful
Animal Science Enrollment Grows
Department has Comprehensive Review
Graduate Students Receive Widaman Trust Awards
Animal Science Staff Recognized
Newer Additions to the Animal Science Staff
New Swine Unit in Operation
Block and Bridle Club Receives National Honor
Japanese Students Study at UNL
From the Readers
Staff Members Named to National Offices
Department Hosts International Visitors
Did You Know?
University Judging Teams Compete in National Events

Block And Bridle Annual, 1980

Block and Bridle Annual (1933–2021)

Table of Contents:

Purpose and Emblem ..... inside cover
Animal Science Dept. Chairman Address .........2
Block & Bridle Presidents' Address..... ..........3
Portrait Presentation-Honoree ......4
Visit with the Honoree .......5
Senior Scholarship Award .....6
Junior Scholarship Award .....7
Ads.. ........8-9
Animal Science Faculty ..... 10
Animal Science Graduate Students ........ 11
Animal Science Secretaries ........12
Ads. . . .....13-14
Block& Bridle Advisors... ........l5
Block & Bridle Officers.... .......16
Block & Bridle Executive Committee ... ...17
Block & Bridle Members ....... 18-19
Block & Bridle Initiates...... ......20
Ads... .....21-22
Liaison Committee .........23
Block & Bridle Seniors .........24-30
Ads... .....31-32
Activities & Program …

The Influence Of Cardiac Sympathetics And Periods Of Ischemic Insult Upon Myocardial Blood Flow, Incidence Of Arrhythmia, Electrical Activity And Myocardial Infarction During Coronary Occlusion, Michael J. Barber

Dissertations

No abstract provided.

Lysine Requirement Of Pigs Weighing 5 To 15 Kg Fed Practical With And Without Added Fat, A. J. Lewis, E. R. Peo, Jr., B. D. Moser, T. D. Crenshaw

Department of Animal Science: Faculty Publications

Weanling crossbred pigs (average weight 5 kg) were fed diets containing two levels of fat and six levels of lysine in a 2 • 6 factorial design to determine the lysine requirement of young pigs fed practical diets with and without added fat. The diets were based on corn and soybean meal and contained either 5% sucrose or 5% lard. Lysine levels ranged from .95% (basal) to 1.45% in .10% increments. The growth trial was 28 days long and pigs were bled at 14 and 28 days. Feed intake (ADFI), weight gain (ADG), feed efficiency (G:F) and changes in plasma …

Heterosis And Breed Effects In Swine, R. K. Johnson

Department of Animal Science: Faculty Publications

An objective of the NC-103 regional swine breeding project is to evaluate inter-population and intra-population performance of domestic and exotic strains of swine. Several cooperating stations have conducted experiments relative to this objective. Projects were not exact replicates, but sufficient overlap allowed combining the information to yield more precise estimates of heterosis and breed effects than was possible from the analyses of data from any single experiment. This publication summarizes data available from NC-103 cooperating stations on breed and heterosis effects in swine. An extensive crossbreeding experiment has been conducted and results published by Canadian researchers Fahmy and Bernard, 1971 …

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

Farm, Ranch and Home Quarterly

In this issue

: Market Center Proposed...................................... 2

Founder-Researchers Seek Baseline Information .......................... 3

Research Digest .......................................... 4

'Technical Assistance is Key In Food Production Development ......................... 6

Botulism-A Big Problem in a Small Package ........................ 8

Pen of Three-Youth Experience in Beef Production ...................................... 11

Applicators Tested for Soybean Herbicide Control ...................................... 12

Fuel Survey-Keeping Tabs on Energy Use ................... 14

Creativity in Young Children .............................. 16

Education Importance and Satisfaction- QUALITY OF LIFE................................ 18

Alexandria: A Study in Community Development .......................................... 22

G80-518 Factors In Marketing Corn, W. Duane Foote

University of Nebraska-Lincoln Extension: Historical Materials

This NebGuide discusses grain standards for corn and how they effect the value of corn.

Grading standards have been established for corn, wheat, barley, oats, rye, sorghum, flax seed, soybeans, triticale, and mixed grain. Grade requirements are designed to describe grain and provide the foundation for pricing. Within a defined range, grain standards inform buyers and sellers about the general characteristics of the grain being graded. Thus, a uniform system of grading is essential for the orderly marketing of grain.

Dynamic Simulation Of Animal Growth And Reproduction, Otto J. Loewer Jr., Edward M. Smith, Gerald Benock, Nelson Gay, Thomas C. Bridges, Larry G. Wells

Biosystems and Agricultural Engineering Faculty Publications

A rather unique systems analysis approach has been made to simulate the utilization of dry matter by ruminant animals, and the natural breeding and reproduction process within a herd. Physiological factors occurring over time and the time related effects of these factors are simulated.

Sulphur Nutrition Of Pastures And Crops Phosphorus And Potassium Nutrition Of Pastures On Deep Sands In The High Rainfall Areas, J S. Yeates, M F. Clarke

Experimental Summaries - Plant Research

CONTENTS A. SULPHUR 1. Sources, rates, time of application of sulphur to legume pastures (high rainfall) - 80AL1, 80AL4, 80MA1, 80KE1. 2. Sulphur soil test on pastures (high rainfall) - 80AL12, 80AL13, 80AL14, 80BY2, 80KE2. 3. Sulphur rundown on sulphur absorbing soils of the high rainfall areas - 80BY1. 4. Sulphur requirements of pasture in low rainfall areas - 80JE17, 80M020. 5. Residual value of 1979 applied sulphur. Rates of fine gypsum applied 1980 - 79AL2, 79AL18, 79AL22, 79AL23, 79AL25, 79AL41, 78BA8 B, 79BY3, 79BY4, 79HA2, 79KE3, 79KE7, 79M020. 6. Sulphur requirements of wheat - 80JE16, 80M09. B. PHOSPHORUS 7. …

Wheat Potential Yield Trials., M. W. Perry

Experimental Summaries - Plant Research

Contents: 1. Wheat Potential Yield Trials. 80BA4 - Cooperative project with R.N. Weir. 80KA7, 8OWH8 D. Tennant and A.G.P. Brown. Detailed summary issued as a separate report. 2. Yield Analysis of Historically Important Wheats 80WH6, 80M4*, 80C2, 80N4* 80WH7, 80M5*, 80A3, 80SG20. 3. Cereal Seeding Rates for the Eastern Wheatbelt. 80ME5*, 80M6*. 4. Intensive Wheat Production Trials (Seeding Rates x Cycocel x Nitrogen xSeptoria Control) 80M038, 80N042, 80MT4, 80N041, 80KA34. 5. Alternative Crop Trials - High Rainfall 80MA7, 80MA8. 6. Regenerating sandplain Lupin Rotation Trials 79GE38/SOGE12 , 79GE42/80GE13. 7. Miscellaneous Trials i) Early Seeding of Late Maturing Varieties - 80MT5. …

Trace Element Nutrition, J. W. Gartrell, R. F. Brennan

Experimental Summaries - Plant Research

Field trials. 1. Long term copper residual page 1. 2. Effect of granule size and cultivations on copper availability – 79N23 page 2. 3. Copper, zinc residual for sub-clover – 78MO26 page 5. 4. Copper, zinc residual for sub-clover on peaty sand – 75AL24 page 6. 5. Effect of copper fertilizer on wheat yield – 80NO27 page 7. 6. Ammonium sulphate/molybdenum on wheat – 80NO28 page 8. 7. Mo, lime, mg on sub-clover – 80NO29 page 9. 8. Zinc residual with high analysis N.P. Fertilizer for wheat – 80NO31 page 10. 9. Zinc, sulphur, copper residual with high analysis N.P. …

Horse Pasture, Garry D. Lacefield, J. Kenneth Evans, John P. Baker

Agriculture and Natural Resources Publications

Pastures for horses should be more than mere exercise lots. High quality pasture can supply enough protein, vitamins, and minerals to meet the nutritional needs of most pleasure horses at relatively low cost. Although pastures furnish substantial amounts of energy, working horses will likely need additional energy supplementation. In addition, pasture will help to maintain healthy animals by furnishing the bulk needed in horse rations, as well as exercise areas, sunshine, and fresh air.

The pasture should be enclosed by a safe, strong fence. Fresh water and shade should also be provided. The pasture should be large enough to encourage …

Effect Of Dietary Lactose On Gain, Feed Conversion, Blood, Bone And Intestinal Parameters In Postweaning Rats And Swine, R. L. Moser, E. R. Peo, Jr., T. D. Crenshaw, P. J. Cunningham

Department of Animal Science: Faculty Publications

Two trials were conducted to determine the effect of lactose on performance, bone integrity and certain blood constituents in post-weaning rats and swine. The effect of lactose on calcium and phosphorus and percentage ash content of the small intestine was also determined. In both trials, average daily gains were not influenced by the feeding of diets containing 30% lactose. Feed conversion was depressed in both rats and pigs when 30% lactose was fed.

Effect Of Various Levels Of Dietary Calcium And Phosphorus On Performance, Blood, And Bone Parameters In Growing Boars, R. D. Nimmo, E. R. Peo, Jr., B. D. Moser, P. J. Cunningham, D. G. Olson, T. D. Crenshaw

Department of Animal Science: Faculty Publications

Ninety-six 8-kg crossbred boars were initially allotted to three dietary levels of calcium (Ca) and phosphorus (P) - (A) .65% Ca; .50% P; (B) .975% Ca; .75% P and (C) 1.3% Ca; 1.0% P - to determine the effects of the different levels on average daily gain (ADG), average daily feed intake (ADFI), feed to gain (F:G) and certain blood and bone parameters.

Effects Of Microbial Feed Additives On Performance Of Starter And Growing-Finishing Pigs, D. S. Pollmann, D. M. Danielson, E. R. Peo, Jr.

Department of Animal Science: Faculty Publications

Three trials were conducted to evaluate the effect of lactic acid-producing microbial feed additives (Probiotics) on performance of starting and growing-finishing pigs. Two commercially available probiotics, Probios (L. acidopbilus) and Feed-Mate 68 (Streptococcus faecium type Cernelle 68), were used. In the first of two starter trials, 192 crossbred pigs (initial weight 7 kg) were used in a 2 • 4 factorial arrangement of treatments, with Probios and antibiotics (ASP-250, lincomycin, tylosin) as the main effects.

Response Of Different Genetic Lines Of Boars To Varying Levels Of Dietary Calcium And Phosphorus, R. D. Nimmo, E. R. Peo, Jr., B. D. Moser, P. J. Cunningham, T. D. Crenshaw, D. G. Olson

Department of Animal Science: Faculty Publications

Two experiments were conducted to determine the effect of various levels of dietary calcium (Ca) and phosphorus (P) on performance, soundness and blood and bone parameters of different genetic lines of boars fed under variable environmental conditions. The first experiment compared different genetic lines of boars fed two levels of dietary Ca and P. Forty purebred (Large White) and Nebraska Gene Pool boars were allotted by breed and initial weight to two levels of dietary Ca and P (.65 Ca/.50% P and 1.3% Ca/1.0% P).

Potential Of Utilizing Scrap Processed Cheese As A Major Ration Component For Channel Catfish, Calvin J. Haskins, Scott H. Newton

Journal of the Arkansas Academy of Science

Three cages (0.9 m³) were stocked with 200 channel catfish, Ictalurus punctatus Rafinesque, fingerlings (73.7 g avg.) in a 1.5 hectare pond. Two cheese rations were formulated and fed to the catfish; the first consisting of cheese, oil, and vitamin C (C + VC)and the second consisting of cheese, cottonseed meal, oil, trace minerals, and vitamins (CC + VM). A commercial trout ration (TC) was fed as a control. High mortalities occurred in the C + VC diet, thus resulting in premature removal of that cage from the study (after 86 days). A sample of 50 fish from the two …

Evaluation Of A Full-Fat Soybean Ration For Channel Catfish Production In Cages, Scott H. Newton, Walter R. Robison, Calvin J. Haskins

Journal of the Arkansas Academy of Science

An experimental ration consisting of 50% full-fat soybeans, heated 170°C, was compared to a commercial trout chow in a 120-day feeding trial using two stocks of channel catfish, Ictalurus punctatus Rafinesque. Catfish were reared in 0.9 m³ floating cages, with 200 fish per cage, anchored in a 1.5 hectare farm pond. A Central Arkansas stock significantly outperformed a Southeast Arkansas stock for comparisons of net production and food conversion efficiency (FCE), with 92% greater production and 41% better FCE, respectively. Survival was 90% or greater for all fish. There was no significant difference in dress-out weight between the stocks. However, …

Feeding Value Of High Protein Oat Silage Versus Corn Silage For Dairy Cows, Tilahun Sahlu

Electronic Theses and Dissertations

Corn accounts for 80% of the total silage production in the United States while oats ranks second as a feed grain crop. Oats are a major crop in areas of the world where temperatures are cool and short growing seasons are not well suited for corn production. South Dakota is the leading oat producing state in the nation with 1. 68 million kilograms of oats produced annually. Oats play an important roll as animal feed because among common cereals in the United States it ranks highest in both protein and lysine content. Due to the wide genetic diversity of oat …

Proceedings Of The 7th Annual Meeting, Southern Soybean Disease Workers (April 2-3, 1980, Fort Walton Beach, Florida)

Southern Soybean Disease Workers: Conference Proceedings

Contents

Schedule, Committees, Officers

History of the Southern Soybean Disease Workers, Glen Whitney

Presidential Address, H. Ray Smith

Global Agriculture Year 2000: A Strategic Analysis, Stuart Stearns

Attorneys Got Us Into This Mess, Attorneys Must Get Us Out, John Donley

Soybeans as a Protein Source, Kenneth Lepley

Soybeans in Human Nutrition, Ruth Patrick

Review of Plant Parasitic Nematode Problems on Soybeans, John Fulkerson

Efficacy of Nematicides for Nematode Control, Charles Baldwin

Breeding for Nematode Resistance, C. E. Caviness and R. D. Riggs

Effects of Fertility on Efficacy of Nematicides for Control of the Soybean Cyst Nematode, Al Chambers

Mississippi's Approach …

Growth And Performance Of Growing-Finishing Lambs Exposed To Long Or Short Photoperiods, B. D. Schanbacher, J. D. Crouse

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

The effects of photoperiod (8 hr light: 16 hr dark [8L:16D] or 16L:8D) on performance of growing-finishing lambs were evaluated in an experiment with 24 rams and 24 wethers. All lambs were caged in groups of two in a controlled environment and fed a pelleted diet ad libitum for the duration of the study (10 to 22 weeks of age). Performance and carcass data showed that both photoperiod and sex of lamb affected growth rate (P<.01) and feed efficiency (P<.05) but that only sex of lamb affected carcass quality (P<.05) and yield (P<.10). A sex by photoperiod interaction was not observed for any of the traits measured. Average daily gain (grams/per day) and feed efficiency (feed/gain) for lambs in the four treatment groups tested were: rams (16L:8D), 410 and 4.3; rams (8L:16D), 340 and 4.5; wethers (16L:8D), 345 and 4.6, and wethers (8L:16D), 300 and 4.8, respectively. Carcass weight, like slaughter weight, was affected by photoperiod (P<.01) and sex of lamb (P<.05); both rams and wethers exposed to long photoperiods had the heaviest carcasses. Ram carcasses were leaner, had better yield grades and were heavier than wether carcasses, yet both ram and wether carcasses graded Choice. Testosterone concentrations in serum were undetectable (<.2 ng/ml) at 22 weeks of age in wethers but were elevated (P<.O1) in ram lambs exposed to short (3.4 ± 1.4 ng/ml) or long (.8 ± .2 ng/ml) photoperiods. Prolactin concentrations, on the other hand, were not influenced by sex of lamb but were influenced (P<.01) by photoperiod; i.e., prolactin concentrations were high in rams (190 ± 34 ng/ml) and wethers (178 ± 28 ng/ml) exposed to long photoperiods and low in rams (43 ± 9 ng/ml) and wethers (27 ± 11 ng/ml) exposed to short photoperiods. These results suggest that testosterone and prolactin may independently affect growth and performance of growing-finishing lambs.

Origins And Effects Of Spartina Wrack In A Virginia Salt Marsh, Thomas G. Reidenbaugh, William C. Banta

Gulf and Caribbean Research

Movements of mats of tidal wrack (dead Spartina alterniflora) and impacts of the wrack were followed in color infrared aerial photographs of a sloping foreshore salt marsh on Wallops Island, Virginia. Tidal wrack may be stranded in high marsh, where it decomposes, or it may be temporarily stranded at lower elevations. The wrack kills underlying Spartina alterniflora in low marsh and in the transition zone from low to high marsh. Wrack is the major cause of devegetated areas within the marsh, but these areas eventually revegetate, and do not evolve into pans. There are substantial short-term reductions in S. …

1980 Beef Cattle Report, Leo E. Lucas

Nebraska Beef Cattle Reports

Weighing steers three consecutive days at the beginning and end of the trial reduced variation and increased the probability of detecting a difference in daily gain and gain/protein ratios between treatments when compared to a standard weighing method (once at the beginning and once at the end of the trial). Regressing 1 initial, 1 final and 11 weekly weights also decreased variation and increased the probability of detecting treatment differences compared to the standard method, but was more variable than using three weights at the beginning and end of the trial.

Young, growing steers and lambs supplemented with natural protein …