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Relation Of Size Of Seed And Sprout Value To The Yield Of Small Grain Crops, T. A. Kiesselbach, C. A. Helm

Nebraska Agricultural Experiment Station: Historical Research Bulletins

A superior yielding power has frequently been attributed to the extra large seed. Since the seeds of any given crop commonly differ markedly in size, it is of importance from the standpoint of crop production to know the extent to which this difference in size may affect the yield of the crop produced. The following experiments have been conducted for the purpose of contributing further to the information upon this subject.

The Entomologist, Edward Meyrick, T. D. A. Cockerell, E. A. Elliot, Selwyn Image, W. G. Sheldon, J. W. Metcalfe, H. D. Smart

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No abstract provided.

The Carpenter Bees Of The Philippine Islands, T. D. A. Cockerell

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No abstract provided.

On The Structure And Classification Of North American Parasitic Worms, Henry Baldwin Ward

Harold W. Manter Laboratory of Parasitology: Library Materials

For many years I have been engaged in the study of parasitic worms from North American freshwater hosts, mostly fish; during this time I have had opportunity to examine and compare material from a large number of localities embracing many widely separated points. In this work I have been aided very greatly by studies on individual groups undertaken and published under my direction by various graduate students to whom my obligation is freely expressed here. In connection with this work it has been necessary to examine critically all original records of parasites from similar hosts and to endeavor to reach …

Color And Color-Pattern Mechanism Of Tiger Beetles, Victor E. Shelford

University of Nebraska State Museum: Entomology Papers

In 1903 the writer undertook a study of variation of the tiger beetles. The work here presented is the outgrowth of this beginning, and indeed includes some small portions regarding color patterns that were written in that year. The work has been prolonged for many reasons, but chief of these was the very large number of species in the group and the fact that an adequate understanding of the material could not be attained without consulting many large collections. Further, the experimental results obtained in 1906 demanded a firsthand study of the variations of the species concerned and their natural …

[Book Review Of] Adaptation In Metapopulations: How Interaction Changes Evolution, By Michael J. Wade., David C. Queller

Biology Faculty Research

Adaptation in Metapopulations: How Interaction Changes Evolution. By Michael J. Wade. Chicago (Illinois): University of Chicago Press . $120.00 (hardcover); $40.00 (paper). vii + 260 p.; ill.; index. ISBN: 978-0-226-12956-3 (hc); 978-0-226-12973-0 (pb); 978-0-226-12987-7 (eb). 2016.

Descriptions Of Fossil Insects, T. D. A. Cockerell

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No abstract provided.

Faunistic Survey Of A Limited Area In New Mexico, Louise Wilkinson, Hazel Fern Reeves

Biology ETDs

The subject of this thesis was suggested by Prof. A. O. Weese. It was chosen by the writers first because they were interested in the distribution and habits of animal life in New Mexico and second because they wished to learn more about classification and methods of classification of animal life in general.

It has been found that New Mexico does not afford so great a variety of animal life as compared with more moist regions but that it affords much more than a casual observation would indicate. Most of those which it affords are found in large numbers.

The …

The Antiquity Of Man In America Compared With Europe, Newton Horace Winchell

Journal of the Minnesota Academy of Science

Last Lecture of Prof. N. H. Winchell, at Cedar Falls, Iowa, April 24, 1914, a week before his death; read also from this revised copy (by Warren Upham) at the monthly meeting of the Minnesota Academy of Science. February, 1916.

Bulletin No. 151 - The Freezing Of Fruit Buds, F. L. West, N. E. Edlefsen

UAES Bulletins

There are many orchards in this country, so located that every few years a frost almost completely destroys the crop, either by killing the buds in the spring of the year, or by freezing the fruit in the fall, just before it is picked. Utah is no exception. A report made by the county agricultural agents of the state, shows that in the spring of 1916, 85 percent of the apples, 90 percent of the peaches, and 65 percent of the mall fruit were killed by frost with a corresponding amount of damage to field crops.

Some Neotropical Megachilid Bees, T. D. A. Cockerell

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No abstract provided.

The Insect Association Of A Local Enviornmental Complex In The Dsitrict Of Holmes Chapel, Cheshire., Alfred E. Cameron

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No abstract provided.

X. Notes On Some British Guiana Hymenoptera (Exclusive Of The Formicidae)., G. E. Bodkin

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No abstract provided.

Genetical Studies Of Variegated Pericarp In Maize, R. A. Emerson

Department of Agronomy and Horticulture: Faculty Publications

Two years ago there were presented some results of a study of the inheritance of self pattern in the pericarp of maize seeds, occurring as a sporophytic2 variation in variegated ears (EMERSON1 914). Further results, in entire accord with those previously reported, have now been obtained. In addition, data bearing upon new phases of the problem are also available.

The chief results reported in the earlier paper were the following: ( I ) The more nearly self-colored the pericarp of any seed of a variegated ear, the more likely is the progeny of that seed to produce a self-colored ear …

Amiotic Parthenogenesis In Taraxacum Vulgare (Lam.) Scrk. And Traxacum Laevigatum (Willd.) Dc., Paul B. Sears

Papers in Ecology

The work of which the results are here offered, awaiting detailed presentation in a paper to follow, was begun at the University of Nebraska in 1914, under the direction of the late Dr. Charles E. Bessey. The two species of dandelion which have been studied are respectively the Leontodon taraxacum and the L. erythrospermum of the Second Edition of Britton and Brown's Illustrated Flora: the nomenclature used in the title of this paper has been adopted on the basis of evidence presented in the monograph of the genus Taraxacum by Handel-Mazetti.

On The Occurance Of Vespa Austriaca Panzer In The Northeastern United States, Joseph Bequaert

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There are many facts in the taxonomy and still more in the life-histories of the common American wasps (Vespa) which need a thorough revision. The following small contribution is made with the hope of interesting other entomologists in the subject. During the last summer, the .writer made a point of capturing all the specimens of wasps he met with on his collecting trips, but the result as a whole was very poor, 1916 apparently not being a wasp-year. However, amongst the catch were found two females which he was unable to refer to any of the species previously known from …

The Ceratinid Bees Of The Philippine Islands, T. D. A. Cockerell

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No abstract provided.

A Physiological Study Of Two Strains Of Fusarium In Their Causal Relation To Tuber Rot And Wilt Of Potato, George K. Link

Nebraska Agricultural Experiment Station: Historical Research Bulletins

1. Fusarium tuberivorum Wilcox and Link is the same as Fusarium trichothecioides Woll. 2. Both Fusarium oxysporum and F. trichothecioides can produce both tuber rot and wilt of the potato plant. 3. The wilt is induced by destruction of the root system and by clogging of the xylem elements in the stem, and is, in mild cases, marked by such symptoms as discoloration of leaves, curling and rolling of leaves, and production of aerial tubers. 4. Under field and storage conditions Fusarium oxysporum is more probably responsible for wilt than is F. trichothecioides, and the latter more responsible for …

Notes On Two Free-Living Larval Trematodes From North America, Henry Baldwin Ward

Harold W. Manter Laboratory of Parasitology: Library Materials

Summary

A description is given of the structure and activity of two new cercariae of peculiar type captured free in Lake Erie and Lake St. Clair. They are designated Cercaria anchoroides nov. spec. and C. gorgonocephala nov. spec., and are compared with known European species. Although such an occurrence must be common, these forms are the first to be taken in open fresh waters.

The Keene Forest: A Preliminary Report, J. W. Toumey, Ralph C. Hawley

Yale School of the Environment Bulletin Series

In 1913 the Yale School of Forestry came into possession of certain parcels of land located near Keene, New Hampshire. This land amounting to 629.4 acres was presented to the School as a nucleus for a school forest to be used for purposes of instruction and research. Subsequently in March, 1915, additional lots comprising 270.9 acres were purchased with funds contributed by the original donor. The present area totals 900.3 acres and is know as the "Keene Forest."

Transpiration As A Factor In Crop Production, T. A. Kiesselbach

Nebraska Agricultural Experiment Station: Historical Research Bulletins

The object of experiments reported in this bulletin has been to determine principles according to which water is used by crops. In many agricultural districts, water is frequently a seriously limiting factor in crop production. It has been thought that some means might be devised through a correct understanding of the principles involved, whereby economy in the use of water in farm practice could be increased. In this effort there are two chief points of attack, namely, (1) adjusting the external factors to the needs of the plant, and (2) selecting plants adapted to the conditions.

Ecological Investigations Upon The Germination And Early Growth Of Forest Trees, Richard H. Boerker

University Studies (University of Nebraska) (1888–1984)

Briefly stated the purpose of the present investigation is to inquire into the effect of the more important habitat and seed factors upon the germination and early development of certain American forest trees in control cultures in the greenhouse for the purpose of obtaining data that may be used in the ~ilvicultural management of these species.

Prefatory Note 1 / Preliminary Considerations 7 / Historical 7 / Classification and Resume of Habitat Factors 11 / The Germination Process 15 / Method of Attacking Problem at Hand 19/ Methods and Apparatus Used 2 1/ The Control of Habitat Factors 24 / …

Sunflower Insects In California And South Africa, T. D. A. Cockerell

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No abstract provided.

On A New Subspecies Of Porcupine From Nebraska, Myron H. Swenk

University Studies (University of Nebraska) (1888–1984)

Publication NO.2 of the Nebraska State Biological Survey.

Nebraska porcupines all belong to the yellow-haired species (Erethizon epixanthum) , and these animals have never been abundant in the state. Formerly, however, they were much more numerous than today, and enjoyed a more extended range in the state than they do at the present time. Up to about 1885 these animals occurred across the northern portion of Nebraska east at least to Pierce and Madison counties, there being records of four specimens secured along the small streams tributary to the Elkhorn river in these two counties between 1870 and 1885. Also, …

Evaporation And Plant Zones In The Cedar Point Marsh, Paul B. Sears

Papers in Ecology

Yapp in trying to account for the xerophytic structure of marsh plants by means of evaporation studies has shown a definite correlation to exist between the strata of marsh vegetation and rates of evaporation at corresponding levels. The following studies were made in an attempt to discover what additional correlations, if any, exist between distribution of marsh plants and the evaporational power of the air at different portions of the habitat. While the exact quantitative significance of such work as the following may be brought into question, as it often is, the striking results obtained by Transeau, Livingston, Fuller, Weaver, …

Rules For Entries In Bibliographies, Supplementary To The American And British Library Associations' Catalog Rules, James Chester Bradley

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No abstract provided.

The Prairie Dog And Its Control, Myron Harmon Swenk

University of Nebraska-Lincoln Extension: Historical Materials

Introduction
Injury
Appearance and History
The Prairie Dog Home
Habits
Natural Enemies
General Control
Use of Poisoned Baits
Competitive Experiments in Fall Poisoning
Competitive Experiments in Spring Poisoning
Demonstration Poisoning Experiments
Effect of Poisoning on Other Animals
Fumigation of Burrows
Fumigation Experiments
Less Successful Methods
Bibliography

Mallophaga From Apteryx, And Their Significance, With A Note On The Genus Rallicola, Launcelot Harrison

Harold W. Manter Laboratory of Parasitology: Library Materials

Regards the skins of five species of Apteryx in the collection at the Cambridge University Museum in England. From these were collected three species of Mallophaga belonging to the genus Rallicola. These are described with discussion about the significance of this occurrence upon Apteryx, from which no Mallophaga have previously been recorded.

A Study Of Senescence, William T. Sanger

Historical Dissertations & Theses

A complete study of senescence would involve, not only a consideration of man, but of lower organisms, animal and plant, as well as institutions, races, nations, even the cosmos itself; for assuredly the phenomena of decay are as universal and intricate as those of genesis. In the present study, however, it will be attempted merely to indicate, first, the best that has already been done upon human senescence; second, to add further findings; and third, to set more definitely a number of new problems for future investigation.

Initiation Of Development In Nereis, E. E. Just

Department of Biology Faculty Publications

No abstract provided.