Open Access. Powered by Scholars. Published by Universities.®

Digital Commons Network™

Open Access. Powered by Scholars. Published by Universities.®

Life Sciences

Institution
Keyword
Publication Year
Publication
Publication Type
File Type

Articles 111991 - 112020 of 114027

Full-Text Articles in Entire DC Network

Kentucky Warbler (Vol. 4, No. 1), Kentucky Library Research Collections Jan 1928

Kentucky Warbler (Vol. 4, No. 1), Kentucky Library Research Collections

The Kentucky Warbler

No abstract provided.


Ec28-234 Nebraska System For Tattooing Hogs For Identification After Slaughter, G.R. Boomer, O.O. Waggener Jan 1928

Ec28-234 Nebraska System For Tattooing Hogs For Identification After Slaughter, G.R. Boomer, O.O. Waggener

University of Nebraska-Lincoln Extension: Historical Materials

A plan to identify the individual farm upon which hogs reaching markets are produced has been developed in connection with the efforts toward eradicating tuberculosis among farm animals. While primarily intended as a means of tracing back to determine sources of disease infection, the system of tattooing which is being developed has other significant possibilities. With the growing emphasis on quality products in the market, it is only fair that the producers of high quality commodities receive the premiums paid by processors and consumers. Health of farm animals is a quality factor. The producer of healthy hogs should be rewarded. …


Rb28-229 Fattening Steers Of Various Ages, H.J. Gramlich Jan 1928

Rb28-229 Fattening Steers Of Various Ages, H.J. Gramlich

University of Nebraska-Lincoln Extension: Historical Materials

During recent years the beef industry has undergone vast changes. These have been made necessary in part by economic conditions and in part by changes in the demands of the American people. The tendency has been toward earlier marketing of steers, so that instead of going to the block as mature individuals at from 3 to 5 years of age, they are now reaching the market at a much younger age. In consuming centers where only heavy carcasses of beef were demanded formerly there is a call today for carcasses of the yearling and long yearling class.

The experiments reported …


Wild Birds Introduced Or Transplanted In North America, John C. Phillips Jan 1928

Wild Birds Introduced Or Transplanted In North America, John C. Phillips

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

The early history of the introduction of foreign birds into this country is mostly clothed in darkness. The records of many attempts, if such there were, have long since been buried in back numbers of local newspapers, and if any experiment was unsuccessful it was soon forgotten. Hence, one trying to get an accurate idea of what has happened soon realizes that he is following a hopeless quest. It is much the same with the transplanting of native birds, especially game birds, which have been carried about all over the country from west to east and from east to west …


Bulletin No. 203 - Cattle Ranching In Utah: Report Of A Preliminary Economic Survey Of The Ranch Situations As Of 1925, William Peterson, P. V. Cardon, K. C. Ikeler, Geroge Stewart, A. C. Esplin Nov 1927

Bulletin No. 203 - Cattle Ranching In Utah: Report Of A Preliminary Economic Survey Of The Ranch Situations As Of 1925, William Peterson, P. V. Cardon, K. C. Ikeler, Geroge Stewart, A. C. Esplin

UAES Bulletins

The Mexican War ended in 1846, but the treaty of Guadalupe Hidalgo was not signed until 1848. Meantime, Utah was occupied by the Mormon pioneers, who having no land laws to guide them took land according to a plan furnished by Brigham Young. In Salt Lake City 10-acre blocks were divided into 8 building lots of 1 1/4 acres each. Just at the edge of the city were "five acre lots to accommodate mechanics and artisans; next beyond were 10-acre lots, followed by forty and eighty acres, where farmers could build and reside."


Kentucky Warbler (Vol. 3, No. 4), Kentucky Library Research Collections Oct 1927

Kentucky Warbler (Vol. 3, No. 4), Kentucky Library Research Collections

The Kentucky Warbler

No abstract provided.


Circular No. 68 - Summary Of Publications Jul 1927

Circular No. 68 - Summary Of Publications

UAES Circulars

Circular No. 68 contains a summary of publications issued by the Utah Agricultural Experiment Station, thru its Publications Division, since September 1, 1926. The publications of this Station are no longer sent to a general mailing list (except in cases of libraries and state editors) but are sent only on request. Therefore, copies of any of the publications listed will be sent without charge to those requesting them as long as the supply is available. However in the case of abstracts of scientific and technical papers the supply is very limited and the requests for these should be limited …


Kentucky Warbler (Vol. 3, No. 3), Kentucky Library Research Collections Jul 1927

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

The Kentucky Warbler

No abstract provided.


Bulletin No. 202 - Some Observations On Winter Injury In Utah Peach Orchards, T. H. Abell Jun 1927

Bulletin No. 202 - Some Observations On Winter Injury In Utah Peach Orchards, T. H. Abell

UAES Bulletins

During the winter following the freeze, fruit growers in Utah were deeply concerned over the effects of the cold on their orchards, since it was observed that not only were fruit buds killed, but the tissues of the trunks, limbs, and twigs were turning brown. The question at once arose as to whether or not this browning indicated the approaching death of the trees. It was, therefore, considered important to determine, if possible, the nature and extent of the damage, to discover any factor which might have favored or lessened the injury, and finally to offer suggestions to the orchardist …


Forty-First Annual Meeting Of The Iowa Academy Of Science, May 6 And 7, 1927, Iowa Academy Of Science May 1927

Forty-First Annual Meeting Of The Iowa Academy Of Science, May 6 And 7, 1927, Iowa Academy Of Science

Iowa Academy of Science Documents

No abstract provided.


Bulletin No. 200 - Maintaining Potato Yields By Hill Selection, George Stewart, D. C. Tingey May 1927

Bulletin No. 200 - Maintaining Potato Yields By Hill Selection, George Stewart, D. C. Tingey

UAES Bulletins

Utah's agriculture has passed definitely out of its pioneer period. Single-cropping, whether to wheat, to potatoes, or to sugar-beets, during the past few years has been forced from its last stronghold. The earmarks of mature agriculture are already visible. Of these, there are four important ones: (1) the production of both crops and livestock; (2) careful manuring and irrigation; (3) good crop rotations; and (4) the use of high-grade parental stock, that is, prepotent sires for livestock and strong and healthy seed for crops.


Bulletin No. 199 - Mutual Irrigation Companies In Utah, Wells A. Hutchins May 1927

Bulletin No. 199 - Mutual Irrigation Companies In Utah, Wells A. Hutchins

UAES Bulletins

Cooperation has been an important factor in the development of agriculture under irrigation in Utah. The Mormon pioneers in the Great Basin were the first Anglo-Saxons to practice irrigation on an extensive scale in the United States; hence, it is significant that from the first their irrigation work was accomplished largely as a result of community effort. Private diversions of water there were, of course, even in the earliest times, but for years they were quite out of place in an environment that took quick toll of those individualists who scorned the protection of numbers and refused to cooperate. The …


Bulletin No. 201 - Economic Insects In Some Streams Of Northern Utah, James G. Needham, Reed O. Christenson Apr 1927

Bulletin No. 201 - Economic Insects In Some Streams Of Northern Utah, James G. Needham, Reed O. Christenson

UAES Bulletins

The food of trout in our mountain streams is mainly insects. It is, in part, land insects that fall on the water and are taken as they float upon its surface, but in a much larger part it is insects that grow up in the water and are taken in their immature stages. These are the constant and dependable food-supply. They have been little studied hitherto. This bulletin is a report of a preliminary examination of some Utah streams, made for the purpose of discovering what forms of life are present in the streams and in what relative abundance. Some …


Kentucky Warbler (Vol. 3, No. 2), Kentucky Library Research Collections Apr 1927

Kentucky Warbler (Vol. 3, No. 2), Kentucky Library Research Collections

The Kentucky Warbler

No abstract provided.


Babcock Testing - Principles And Uses, L. K. Crowe, H. P. Davis Apr 1927

Babcock Testing - Principles And Uses, L. K. Crowe, H. P. Davis

Nebraska Agricultural Experiment Station: Historical Circulars

The manufacturing of dairy products on a commercial scale began about the middle of the nineteenth century and was greatly stimulated by the development of the centrifugal cream separator in the late eighties. The invention of the Babcock test in the early nineties overcame some of the difficulties that had developed in paying for milk upon its butterfat content, since it was early recognized that milk varied widely in that respect.


1927 Little International Agricultural Exposition Catalog, Little International Agricultural Exposition South Dakota State University Mar 1927

1927 Little International Agricultural Exposition Catalog, Little International Agricultural Exposition South Dakota State University

Little International "Little I" Agricultural Exposition Catalogs

No abstract provided.


Circular No. 63 - Tomato Culture In Utah, A. L. Wilson Mar 1927

Circular No. 63 - Tomato Culture In Utah, A. L. Wilson

UAES Circulars

The object of this circular is to point out in a general way the essential considerations for successful tomato-growing in Utah. It has become necessary because of the increasing importance of this crop in the state as well as in the United States.


Kentucky Warbler (Vol. 3, No. 1), Kentucky Library Research Collections Jan 1927

Kentucky Warbler (Vol. 3, No. 1), Kentucky Library Research Collections

The Kentucky Warbler

No abstract provided.


Factors Controlling Germination And Early Survival In Oaks, Clarence F. Korstian Jan 1927

Factors Controlling Germination And Early Survival In Oaks, Clarence F. Korstian

Yale School of the Environment Bulletin Series

There is little information available upon the seed and seedling characteristics of the American oaks. Among the fundamental problems in American silviculture, those which relate to seed efficiency are especially important. The future productiveness of the hardwood forests in which chestnut has been an important·element rests largely upon seed and sprout efficiency. Seed efficiency is governed by (I) seed production, (2) seed distribution, and (3) the factors affecting the reproductive value of the seed, such as viability, storage of seed in the litter of the forest floor, and destruction by insects and rodents.


A Revision Of The Nematodes Of The Leidy Collection, Arthur C. Walton Jan 1927

A Revision Of The Nematodes Of The Leidy Collection, Arthur C. Walton

Harold W. Manter Laboratory of Parasitology: Library Materials

Through the courtesy of Dr. Henry Baldwin Ward of the University of Illinois, and of Dr. J. Percy Moore of the University of Pennsylvania, the extensive nematode collection assembled by the late Joseph Leidy, and now housed in the museum of the University of Pennsylvania, has been made available for critical study and the present report is the first of a series covering this material. The writer wishes to express his hearty appreciation of the kindness of these two men, and also of that of Dr. Joseph Leidy, Jr., in making this opportunity possible. To make the study more complete …


A Study In The Metabolism Of The Adult Honey Bee, M. D. Farrar Jan 1927

A Study In The Metabolism Of The Adult Honey Bee, M. D. Farrar

Electronic Theses and Dissertations

The study of metabolism in the higher forms of life has been carried on for many year and much has been found out that has been of great importance in understanding the way things live and grow. It has been only in the last few years that attention has been given to this phase of the work in insects. The extensive work that has been carried on concerning metabolism in men and animals is the basis for the more recent researches on the lower forms including the microorganisms. Before this work could be carried out on the small forms it …


Bulletin No. 198 - Report Of The Director: For The 18-Month Period From January 1, 1925, To June 30, 1926 Dec 1926

Bulletin No. 198 - Report Of The Director: For The 18-Month Period From January 1, 1925, To June 30, 1926

UAES Bulletins

In the following report of the Utah Agricultural Experiment Station for the past eighteen months, record has been made in as much detail as space would permit. The text is intended to give the present status of the projects under consideration and to record the changes and additions since the last report.


Studies On The Ascaris Lumbricoides, H. M. Martin Dec 1926

Studies On The Ascaris Lumbricoides, H. M. Martin

Nebraska Agricultural Experiment Station: Historical Research Bulletins

The Ascaris lumbricoides, in one phase or another, has attracted the attention of parasitologists for many years, and during the last decade this parasite has been studied by a large number of investigators. The recent observations have been, to a great extent, directed along one line, the study of its life history. These investigators have established two important points: (a) That the life history of Ascaris is more complex than was supposed, as it has been found that a vasculo-pulmonary circuit of the larvae is necessary before they settle down in the intestine, where they develop to the adult …


Studies On The Ascaris Lumbricoides, Harry Mathias Martin Dec 1926

Studies On The Ascaris Lumbricoides, Harry Mathias Martin

University of Nebraska-Lincoln Extension: Historical Materials

The Ascaris lumbricoides [roundworm], in one phase or another, has attracted the attention of parasitologists for many years, and during the last decade this parasite has been studied by a large number of investigators. The recent observations have been, to a great extent, directed along one line, the study of its life history. These investigators have established two important points: (a) That the life history of Ascaris is more complex than was supposed, as it has been found that a vasculo-pulmonary circuit of the larvae is necessary before they settle down in the intestine, where they develop to the adult …


Nutrient Requirements Of Growing Chicks, F. E. Mussehl Dec 1926

Nutrient Requirements Of Growing Chicks, F. E. Mussehl

Nebraska Agricultural Experiment Station: Historical Research Bulletins

The object of our experimental work was to establish if possible certain principles of poultry nutrition, permitting later a better combination of natural feedstuffs with the highest growth efficiency.


Kentucky Warbler (Vol. 2, No. 4), Kentucky Library Research Collections Oct 1926

Kentucky Warbler (Vol. 2, No. 4), Kentucky Library Research Collections

The Kentucky Warbler

No abstract provided.


Circular No. 62 - Summary Of Publications Sep 1926

Circular No. 62 - Summary Of Publications

UAES Circulars

Circular No. 62 contains a summary of publications of the Utah Agricultural Experiment Station issued since September 1925. The publications of this Station are no longer sent to a general mailing list (except in the case of libraries), but are sent. only on request. Therefore, copies of any of the publications listed will be sent without charge to those requesting them as long as the supply is available. However, in the case of abstracts of scientific and technical papers the supply is very limited and the requests for these should therefore be limited as far as possible only to those …


Grazing Periods And Forage Production On The National Forests, Arthur W. Sampson, Harry E. Malmsten Sep 1926

Grazing Periods And Forage Production On The National Forests, Arthur W. Sampson, Harry E. Malmsten

Aspen Bibliography

Stockmen in the West have always had confidence in the adequacy of the native forage crop to provide pasturage for their livestock. Indeed, under normal climatic conditions this enormous natural resource has not failed the grazier, except where it has been called upon to meet unreasonable demands. The productivity of the range has declined sharply, however, wherever the requirements of plant growth have been disregarded for many years in succession. Where there has been too early or too frequent and to heavy grazing, undue trampling, or some other unsatisfactory feature of range use, the results have been uniformly bad. Many …


Kentucky Warbler (Vol. 2, No. 3), Kentucky Library Research Collections Jul 1926

Kentucky Warbler (Vol. 2, No. 3), Kentucky Library Research Collections

The Kentucky Warbler

No abstract provided.


Turkey Production, F. E. Mussehl Jul 1926

Turkey Production, F. E. Mussehl

Nebraska Agricultural Experiment Station: Historical Circulars

Whatever problems turkey production presents, lack of demand for roast turkey is not at this time one of them. Turkeys rate so high in popular esteem that very rarely indeed do prices fall below that of dressed chickens and usually the best grades are 12 to 15 cents per pound higher during the holiday season. The world of commerce has become quite complex but the consuming public still has one clear way of speaking to producers. In the language of the dollar we are apparently being asked to raise more turkeys.