Digital Commons Network^™

Distributional Notes On The Theclinae Of Arkansas, H. A. Freeman

Field and Laboratory

During the past 24 years I have collected rather thoroughly over the state of Arkansas, and found 12 species of hairstreaks in four genera represented there. Their local habits show that they are most likely indigenous. All of the present information is first-hand, except that on Incisalia irus (Godart), which was furnished by Mr. Paul McHenry of El Dorado, Ark.

Early Release From Aspen Improves Yield Of Pine Plantations, E.I. Roe

Aspen Bibliography

No abstract provided.

The Sedimentation Rate Of Potato Yellow-Dwarf Virus, M. K. Brakke, L. M. Black, Ralph W. G. Wyckoff

Department of Plant Pathology: Faculty Publications

BLACK et al. (1948) have published electron micrographs of bodies believed to represent the New York variety of potato yellow-dwarf virus (Aureogenus vastans (H) Black) (Holmes 1948). The photographs showed bodies in several different extracts of infected plants of Nicotiana rustica L., but not in corresponding preparations from healthy plants. Similar bodies were found in concentrates from plants infected with the New Jersey variety of the virus (var. agalliae Black). These bodies were larger than, and of a different character from, those of plant viruses hitherto examined in the electron microscope. The present study was undertaken to obtain evidence …

Enemies Of Aspen, Clyde M. Christensen, Ralph L. Anderson, A. C. Hodson, Paul O. Rudolf

Aspen Bibliography

So long as aspen was considered primarily a weed species, there was little concern over the enemies which might injure or destroy it. Sometimes these enemies were actually considered "blessings in disguise. Now, however, that aspen not only is the most abundant "but also one of the most widely utilized tree species in the Lake States, there is increasing interest in anything that may affect its future supply. For that reason this brief summary of information on the enemies of aspen has been assembled.

Biotic Interrelationships Of Helminth Parasitism, Robert L. Rausch

Harold W. Manter Laboratory of Parasitology: Faculty Publications

Biotic interrelationships in Alaska have so far suffered little from man's attempts to improve upon nature. As a result of these favorable circumstances, biological investigation in Alaska offers unusual opportunity for elucidating problems which can no longer be approached in the more populated parts of North America. One is very fortunate to have the opportunity of working under these conditions, since present trends indicate that Alaska is soon to go by the way of the great wildernesses which once existed in the United States and Canada.

Studies On The Germination, Production, And Distribution Of Johnson Grass Seed In Certain Areas Of Louisiana., Ruth Patterson Phillips

LSU Historical Dissertations and Theses

No abstract provided.

Mammals Of The Mexican State Of San Luis Potosi., Walter Woelber Dalquest

LSU Historical Dissertations and Theses

No abstract provided.

Progressive Development And Seasonal Variations Of The Corn Crop, T. A. Kiesselbach

Nebraska Agricultural Experiment Station: Historical Research Bulletins

The chief purpose of these studies has been to determine the normal growth changes that occur in the corn plant at successive intervals when growing in the field, and to observe annual yield variations in relation to prevailing weather conditions. Aside from supplying information regarding the physiology of this crop, the data are of interest to the corn grower because they indicate comparative yields, shelling percentages, moisture contents, and feed constituents at various stages of development. Some data also are presented concerning the effects of frost, drouth, day length, and the economic value of tillers and seminal roots.

The Staphylinoid And Dascilloid Aquatic Coleoptera Of The Nevada Area, Ira La Rivers

Great Basin Naturalist

No abstract provided.

Notes On Megathymus, With Description Of A New Species (Lepidoptera, Rhopalocera, Megathymidae), H. A. Freeman

Field and Laboratory

No abstract provided.

Kallstroemia Perennans Turner, Comb. Nov., B. L. Turner

Field and Laboratory

No abstract provided.

Osteology Of The Skull Of Phrynosoma Cornutum (Harlan), Arthur J. Detrie

Field and Laboratory

The horned lizard, Phrynosoma cornutum, was first desscribed by Harlan as Agama cornuta; in 1831, J. E. Gray transferred the species to the genus Phrynosoma. Much work has been done on the species. Many of the references to Phrynosoma cornutum are of a taxonomic nature, while references to its morphology are few and the material in the papers is scant. Description of the osteology of the skull are lacking.

A New Violet Endemic To Southeastern Texas., V. L. Cory

Field and Laboratory

No abstract provided.

The Trichoptera Or Caddis Flies Of Dallas County, Texas, Clarence C. Hall Jr.

Field and Laboratory

Major contributions to our knowledge of American Trichoptera have been made (1934-47) by H. H. Ross, Cornelius Betten, and D. G. Denning. Their investigations, while concentrated in the eastern states, included some of the central states. Betten's work (1934) has been the basis for many recent studies. We know little, however, of the distribution of this order in Texas, even though it occurs abundantly in waters of the State. Most of the records for Texas were made in 1939 by H. H. Ross. In his report (1944), he recorded seven families and thirty species from Texas, ten of which were …

Whole Issue Nebraska Bird Review (Oct 1950) 18(4)

Nebraska Bird Review

Contents

Notes on the Nesting of the Black-crowned Night Heron at the Valentine National Wildlife Refuge ....................63

Announcements ....................64

General Notes ....................65

Constitution and By-Laws of the Nebraska Ornithologists' Union ....................71

Mourning Doves ••• Photographed by Don W. Carter ....................74

Book Reviews ....................76

Twenty-Sixth annual Cooperative Spring Migration Report ....................77

Effect Of Stubble Mulching On Number And Activity Of Earthworms, S. P. Teotia, F. L. Duley, T. M. Mccalla

Nebraska Agricultural Experiment Station: Historical Research Bulletins

A survey of earthworm population under different cropping systems was made under stubble mulch farming and where the residue was plowed under. The influence of earthworms on some of the important physical and biological properties of the soil was studied. Their role in the decomposition of crop residues was also determined.

The Growth-Promoting Properties Of Quinic Acid, Malcom Gordon, Francis A. Haskins, Herschel Mitchell

Department of Agronomy and Horticulture: Faculty Publications

Evidence is accumulating that there is a common metabolic precursor to many of the benzene ring derivatives found in living organisms. Recent work by Davis and Tatum indicates that one such precursor is the naturally occurring shikimic acid (Fig. 1) since this compound serves as a growth factor for certain mutants of Escherichia coli and Neurospora which otherwise require a combination of tyrosine, phenylalanine, tryptophan and p-aminobenzoic acid for growth. These mutants cannot utilize the closely related, naturally occurring quinic acid (Fig. 1) as a substitute for any of their requirements.

Kentucky Warbler (Vol. 26, No. 3), Kentucky Library Research Collections

The Kentucky Warbler

No abstract provided.

The Influence Of Crop Plants On Those Which Follow V, Theodore Eugene Odland, Robert Smith Bell, John B. Smith

Special Collections (Miscellaneous)

This is a study of the effect which crop plants have on the growth and yields of those crops which follow. The study began in 1907; this bulletin reports the results from 1930 to 1942. Millet, mangels and rutabagas generally seem to be harmful to crops which follow them. Carrots, mangels and millet were least favorable of all crops to mangels. Potatoes did poorest when following potatoes, rutabagas, or millet. Rutabagas yielded low following rutabagas, mangels and millet. Onions were unfavorably affect by preceding crops of mangels, cabbage, or rutabagas. There is no simple explanation for the effect of crops …

The Production Of A Hardy Strain Of Paramecium Aurelia Using Modified Ringers No. 2 Solution As A Primary Selecting Agent, John Austin James

Tennessee State University Alumni Theses and Dissertations

No abstract provided.

Records Of Mammals From The Mexican State Of San Luis Potosi, Walter W. Dalquest

Occasional Papers of the Museum of Natural Science, Louisiana State University

No abstract provided.

Whole Issue Nebraska Bird Review (July 1950) 18(3)

Nebraska Bird Review

Contents

Twenty-five Year Summary of Bird Migration in Nebraska, Part 3 - Ducks ................William F. Rapp, Jr .................41

The Distribution of Field Observations on Nebraska Birds During the Last Fifty Years ••• Thomas B. Thorson .................... 47

Ornithology in Nebraska Colleges and Universities Ramona E. Dreyer and William F. Rapp, Jr ....................48

Least Tern ....................Photographed by Ray S. Wycoff, Lexington, Nebraska ....................50

Minutes of the Forty-Ninth Annual Meeting of The Nebraska Ornithologists' Union ....................52

Announcements & General Notes ....................56

Book Reviews ....................60

Studies On The Reactivating Sclerotium Of Physarella Oblong Morgan With Special Reference To The Nucleus, William Thomas Allman

Master's Theses

The Myxomycetes, because of their naked, mobile mass of protoplasm have served biologists and chemists as material for the study of the char­acteristics of protoplasm. The typical life his­ tory of such an organism may be summarized as follows: The vegetative phase in the life history consists of a naked mass of protoplasm, to which Oienkowski (9) applied the name "plasmodium". This plasmodium creeps by reversible streaming over and throughout the substratum, deriving its food from various constituents of decaying vegetable matter which serve as its normal substrate. Upon reaching a state of maturity and under certain environmental conditions, the …

Aspen Management Problems Of The Lake States, Z.A. Zasada

Aspen Bibliography

No abstract provided.

Distribution Of Mayfly Nymphs (Ephemeroptera) In Streams Of Dallas County, Texas, Louis E. Moore Jr.

Field and Laboratory

Although mayflies are of common occurrence in the Southwest, but little work has been done here on them. Most investigations on this group of insects have been done in New York, the Great Lakes Region, and Canada. Some work has been done in the Rocky Mountain area, and also along the Atlantic coast. Berner (1950) has published an extensive work on the mayflies of Florida. This is the first major work in this field since the book, Biology of Mayflies, by Needham, Traver, & Hsu (1935). Besides these, many minor papers on this group have appeared; but for Texas only …

Birthplace Of Ferdinand Rugel (1806-79), Early Southern Botanist, S. W. Geiser

Field and Laboratory

No abstract provided.

A Study Of Stimulated Respiration In The Adrenal Gland, Owen Foster Kline Jr.

Biology ETDs

The purpose of this paper is to present certain preliminary observations on what is believed to be completely new special metabolism in the adrenal gland of Hereford cattle. Although no direct correlation between any of the substances isolable from the adrenal gland and the respiratory system to be described in this paper has been obtained, it is nevertheless necessary to present a review of the chemical and medical data available pertaining to these glands.

Ecological Changes In An Overgrazed Grassland Area Resulting From Eleven Years Of Protection Against Livestock Usage, Larry L. Gordon

Biology ETDs

The present paper, like many others already published, contributes to our knowledge of the effect of long time overgrazing and the recovery of lands temporarily retired from utilization. In the present study, an attempt is made to determine the effects of an eleven year recovery of grazing lands following misuse for nearly two centuries. The topics given detailed attention include the flora with particular reference to the grasses and forbs, the fauna with special emphasis on the rodents, and the climatic and edaphic factors.

The area in which the study was conducted is on the east side of the Rio …

The Man Of Tomorrow, Murray N. Silverstein

Biology Honors Papers

This 28 page thesis speculates on possible evolutionary changes that humans may undergo in order to survive the threats of atomic energy.

63rd Annual Report, Agricultural Experiment Station, University Of Nebraska College Of Agriculture, May 1950

Agricultural Research Division: News and Annual Reports

Soils Research Erosion Control and Moisture Conservation, Soil Microbiology and Crop Residue Management, Mineralogical Studies, Classification and Correlation of Soils in Soil Conservation Districts, Influence of Perennial Grasses on Soil Structure, Phosphorus Status of Nebraska Soils, Fertilizers for Corn on Nonirrigated Soils, Nitrogen Fertilizers for Bromegrass, Properties of Sandy Soils in Northeastern Nebraska, Fertilizers for Winter Wheat, Lime and Commercial Fertilizers for Sweetclover, Nitrogen Maintenance in Sharpsburg Silty Clay Loam Soil, Influence of Irrigation Practice, Seeding Rate and Fertilizer Application on the Production of Safflower, Cultural Experiments with Sugar Beets, Fertilizers for Potatoes Following Bromegrass Pasture, Influence of Irrigation Practice, …