Digital Commons Network^™

Microradiography With Biological Specimens, Arthur D. Wellman

Bachelors’ Theses

Microradiography is a technique in which X-rays are directed through a very thin specimen onto a fine-grained photographic film and the image examined under magnification. It has been used chiefly as a supplementary tool in industrial analysis of metal structures, and even in this field has attained prominence only within the past decade. Its usefulness is limited to fine structures (except where minute flaws or impurities are to be examined in a material), and its success is limited by the degree of clarity in the radiograph to be magnified.

Inheritance Of Certain Characters And The Linkage Relationships Of Factors On Chromosome Iv In Barley, Claude J. Jenkins

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Plant breeding and the development of new or better varieties of plants are essential parts of modern agronomy, horticulture and forestry. The basis for such improvement is a knowledge of the factors and principles of genetics.

A number of genetic studies have been made with barley in recent years. This is partly because of the commercial importance of the crop, and partly because of the many distinct heritable characters of barley plants. The cultivated species of barley offers the plant breeder and geneticist a wealth of material for genetic studies. Varieties differ in a great many readily distinguishable characters, species …

An Etiological And Host Range Study Of Celery Mosaic In Utah, Dennis H. Hall

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Celery mosaic is a virus disease of major economic importance in Utah. In years of severe epiphytotics, it has been a limiting factor in celery production. In 1947 losses due to this disease were estimated to exceed 8 per cent of the total crop. This estimate does not include losses resulting from reduction in grade or from plants discarded in the packing sheds. The celery acreage in Utah dropped from a high of 950 acres in 1946 to 750 acres in 1947 and dropped again in 1948 to 420 acres. Leaders in the industry attributed this reduction in acreage, in …

The Bunt Problem In Relation To Winter Wheat Breeding, Delmar C. Tingey

Faculty Honor Lectures

Man is forever in search of new and better crops. He has for centuries been a persistant and fairly successful plant . breeder. Ancient Chinese are credited with breeding superior varieties of rice and hybrid flowers. Indians in America produced remarkable varieties of corn, and it was not until modern corn breeders developed "hybrid corn" that they produced superior yielding varieties.

The discovery of Mendel's work on hybridization 50 years ago pointed the way to almost limitless possibilities in plant improvement through breeding. Mendel discovered that if two related individuals were hybridized, it was possible in later generations to obtain …

The Sixty-Second Session Of The Iowa Academy Of Science And The Seventeenth Convention Of The Junior Academy Of Science Of Iowa, April 21 And 22, 1950, Iowa Academy Of Science

Iowa Academy of Science Documents

No abstract provided.

A New Elasmosaur From The Eagle Ford Shale Of Texas: The Elasmosaur And Its Environment, Ellis W. Shuler

Fondren Science Series

When Mr. Andy Anderson donated to Southern Methodist University the petrified skeleton of a great marine lizard found on his plantation near Cedar Hill, Texas, he said, "Write about it so common folks can understand." In view of this request, the description of this new and important specimen has been divided into two parts. Part I is a technical description of the skeleton written by S. P. Welles, Principal Museum Paleontologist, University of California (Berkeley), an authority on the elasmosaur group to which the specimen belongs. Mr. Welles completed his manuscript, Part I of Number 1 in the Fondren Science …

Whole Issue Nebraska Bird Review (April 1950) 18(2)

Nebraska Bird Review

Contents

Twenty-five Year Summary of Bird Migration in Nebraska, Part 2.....William F. Rapp, Jr. ..............23

News and Notes ..............25

Report of the Membership Committee 29

Wildfowl Sketches....C.G. Pritchard ..............30

Announcements ..............32

General Notes ..............32

Periodicals in the Nebraska Ornithologists' Union Library ..............36

Book Reviews ..............39

Microorganisms And Soil Structure, T. M. Mccalla

Department of Agronomy and Horticulture: Faculty Publications

SUMMARY

Laboratory tests were made to determine the effectiveness of different compounds and microbial groups in increasing the stability of Peorian loess lumps against the action of falling water drops. The influence of these on percolation tests in the laboratory was also determined.

Many organic substances-dextrose, sucrose, starch, peptone, cullulose, and gum arabic-did not themselves contribute directly to soil-structure stability, though these substances do furnish energy material for soil microorganisms, which can convert them readily into either microbial tissue or decomposition products that increase soil-structure stability. Lignin, proteins, oils, fats, waxes, resin, and paraffin increased the stability of lumps of …

Bulletin No. 345 - Effectiveness Of Gravity Drains And Experimental Pumping For Drainage Delta Area, Utah, O. W. Israelsen, D. F. Peterson Jr., R. C. Reeve

UAES Bulletins

Cooperatie investigations on drainage and reclamation of salted soils in the Delta Area, Utah, were undertaken by the Utah Agricultural Experiment Station, the U. S. Regional Salinity Laboratory, and Millard County Drainage Districts under a memorandum of understanding effective January 1, 1946.

This investigation comprises project 250 of the Utah Agricultural Experiment Station, R. H. Walker, director; and project 50-46-1 of the U. S. Regional Salinity Laboratory, H. E. Hayward, director.

The objectives of the investigations covered by the memorandum of understanding were:

1. To study the effectiveness of present methods of drainage; tile and open drains.

2. To determine …

Bulletin No. 342 - The Nutritive Content Of The Grazing Sheep's Diet On Summer And Winter Ranges Of Utah, C. Wayne Cook, Lorin E. Harris

UAES Bulletins

Approximately two million sheep graze the native ranges of Utah each year. These animals are on the range most of the year and their food supply must come from range plants as they are normally selected. The nutritive value of range forage is often borderline or deficient in essential nutrients, yet, sufficiently adequate to prevent obvious physiological disorders. These mild deficiencies may affect the productive efficiency of the animal even though no symptoms are apparent.

Genetic And Taxonomic Studies In Gilia: I. Gilia Capitata, Verne Grant

Aliso: A Journal of Systematic and Floristic Botany

No abstract provided.

Influence Of Eastern Redcedar On Soil In Connecticut Pine Plantations, Laurence C. Walker, R.A. Read

Faculty Publications

Physical and chemical properties of surface soil beneath eastern redcedar trees in pine plantations in Connecticut were found to be different from those beneath adjacent pines. Properties of the surface soil beneath redcedars were apparently influenced by the specific chemical nature of the cedar leaflitter, its decomposition products, and subsequent' incorporation in the soil by earthworms.

Ecology And Silviculture Of Whitecedar And Associated Hardwoods In Southern New Jersey, Silas Little Jr.

Yale School of the Environment Bulletin Series

No abstract provided.

Pollination (In Growing Alfalfa For Seed In Utah), F. E. Todd, George E. Bohart, William P. Nye

All PIRU Publications

No abstract provided.

Agricultural Research In South Dakota: Sixty-Third Annual Station Report, July 1, 1949 - June 30, 1950, South Dakota State College Of Agriculture And Mechanic Arts

Agricultural Experiment Station and Research Farm Annual Reports

No abstract provided.

Leaflet No 1003 - The Salt Problem In The Wheat Belt, G. H. Burvill

Bulletins 1 - 2999

IN the wheat belt of Western Australian bare patches in farm paddocks are often seen. Many are bare, or almost bare, because of too much salt in the soil. The excess of salt prevents the germination of seeds, or kills living plants, because it causes the water supply for germination or growth to be cut off. This salt problem is so serious in places that single farms or groups of farms have been ruined; wheat growing on them has become unprofitable.

Influence Of Winter Housing Conditions On Growth Rates And Feed Consumption Of Dairy Heifers, Emery H. Bartle

Electronic Theses and Dissertations

It is important in dairy cattle management to maintain steady and continuous growth of heifers and thereby secure properly developed cows which will give the production that is expected of them when they are brought into the milking herd. In general, heifer calves during the first twelve months of their growing period are carefully managed as to feed, housing and care to promote normal growth. However, they are often neglected during their yearling stage to the point where growth is retarded because of environment factors. On many dairy farms in the North Central States the management of yearling dairy heifers …

Dimension Stock And Other Uses Of Aspen, Alexis J. Panshin

Aspen Bibliography

Utilization of aspen for pulpwood, excelsior bolts, veneer logs and lumber has increased steadily during the past 10 years. This was particularly true during the war years when, because of the scarcity of other timber, aspen entered many new phases of utilization. In the lumber field alone the wider acceptance of aspen has been reflected in an increase in the annual production from 67 million board feet in 1941 to 152 million board feet in 1946. It is estimated, however, that aspen stands in the Lake States can provide an annual cut of at least 300 million board feet of …

South Dakota Farm And Home Research, Agricultural Experiment Station

South Dakota Farm and Home Research: 1949 -1998

Liquid Seed Treatment Reduces Hazard [p] 25
Deep Freeze or Locker Plant Meat [p] 29
Fruits and Vegetables in the Home Freezer [p] 32
Looking Ahead to Irrigation [p] 34
Project Families Like Irrigation Farming [p] 36
Norghum—Its Feed Value for Lambs [p] 40
Controlling Heel Flies and Cattle Grubs [p] 43
Weed Control [p] 46
New Fruit Trees for South Dakota [p] inside back cover

Agricultural Problems Of India., Teja Singh Gill

LSU Historical Dissertations and Theses

No abstract provided.

Liquid Loss From Glass Jars Processed In The Pressure Cooker, Arnold E. Baragar

Nebraska Agricultural Experiment Station: Historical Research Bulletins

Home canners and extension home economists have inquired frequently why much liquid is sometimes lost from glass jars of food processed in the pressure cooker. At an extension service Home Canning Research Conference held at Kansas City, December, 1946, state extension agents requested research on this home canning problem, because no published reports were available. This bulletin is a report of experiments with glass jars processed in a pressure cooker to determine (1) conditions that allow much liquid to be expelled from jars, (2) conditions that reduce liquid loss to a negligible amount, and (3) the physical conditions involved in …

Observations Of The Life Cycle And Larval Development Of Paruterina Candelabraria (Goeze, 1782) (Cestoda: Dilepididae), Robert L. Rausch

Harold W. Manter Laboratory of Parasitology: Faculty Publications

Paruterina candelabraria (Goeze, 1782) is parasitic in owls in Europe and North America, and appears to be the most frequently encountered cestode occurring in strigiform birds (Wolffhugel, 1900; Rausch, 1948). It is the purpose of this paper to present observations on the larval development and life cycle of P. candelabraria. Apparently nothing is known concerning the life cycles of cestodes of the genus Paruterina Fuhrmann, 1906, most of which occur in passeriform birds.

South Dakota Farm And Home Research, Agricultural Experiment Station

South Dakota Farm and Home Research: 1949 -1998

In This issue
Norghum [p] 1
Nitrate Poisoning [p] 3
Breeding Better Pigs [p] 5
Farm Septic Tanks [p] 7
The Dairy Calf Needs a Boost [p] 12
Don’t Just Dig a Hole! [p] 15
Should We Feed Lambs Cobalt? [p] 18

Soil-Root Relationships Of Certain Native Grasses In Various Soil Types, J. E. Weaver, R. W. Darland

Department of Agronomy and Horticulture: Faculty Publications

Table of Contents:
Introduction
Methods
Selecting The Site
Preparing The Trench
Marking Out The Monolith
Examination Of Soil
Preparing And Washing Away Of The Soil
Preparing The Roots For Photographing And Quantitative Study
Photographing And Sectioning The Root System
Examples Of Root Distribution In Different Types Op Sol
Kentucky Bluegrass
Blue Grama
Big Bluestem
Root Distribution In Soils With Claypans
Western Wheat Grass In Crete Silty Clay Loam
Western Wheat Grass In Butler Silt Loam
Root Development In Adjacent Soil
Western Wheat Grass In Scott Silty Clay Loam
Western Wheat Grass In Rendzina Soil
Root Distribution In Mellow Loess Soils …

Adequacy Of The High School Science Vocabulary In Biology In Filling The Needs For Normal Reading Of Popular Magazines, Clarence H. Stinemetze

Master's Theses or Doctor of Nursing Practice

The problem as implied in the title of this report has been an attempt to evaluate in terms of the vocabulary of the high school biology textbooks adopted by the State of Kansas. This study used five current magazines which were available to the students at the high school circulation desk, at the public library, on magazine counters, and in the home library.

Commencement Exercises 1949, College Of Medical Evangelists

Commencement Programs

CONTENTS

2 | Lead On, O King Eternal - Ernest W. Shurtleff

3 | Program

4 | Class Roll

Commencement Sermon 1949, College Of Medical Evangelists

Commencement Programs

CONTENTS

2 | The Lord in Zion Reigneth - Fanny Crosby

3 | Program

4 | Class Roll

William D. Moore (1824-96), Amateur Geologist Of Mississippi, S. W. Geiser

Field and Laboratory

It is now nearly ninety years since William D. Moore, then professor of English at the University of Mississippi, collaborated with Eugene W. Hilgard on his famous geological report of that State. The archivists and historians have lost Moore from their records (if, indeed, they ever sought seriously for information of him), so that what was written five years ago of W. D. Moore (in another connection) remains as true as it was then: "No record of whence he came, or whither went (when the University closed in 1861), is to be found at the Univer­sity." Since the present writer …

A Study Of Saponification Rates As Characteristic Of Esters, Thomas F. Mitchell Jr.

Bachelors’ Theses

The saponification of esters has been the subject of considerable study, and the technology of manipulation of the reaction well defined. As a result, the reaction has become a quantitative standard for ester analysis. However the comparison of the rates of this reaction with various esters as charaeteristic of them has received little consideration compared to the course of the reaction. The work of Mr. F. E. Adler on the adaptation of fat constants to waxes suggested the problem. The thesis will attempt to ascertain any significant differences in the saponification rates of various esters with regard to their characterization.

An Inquiry Into The Relationship Between Sulfur And Plant Growth, George E. Dillinger Jr., William F. Weber

Biology Honors Papers

This 64 page thesis attempts to clarify the relationship between sulfur and plant growth.