Life Sciences Commons^™

Control Of Flowering In Teosinte: Short-Day Treatment Brings Early Flowers, R. A. Emerson

Department of Agronomy and Horticulture: Faculty Publications

Attempts to force teosinte into flower in mid-summer, in order to facilitate hybridizing it with maize, have afforded considerable information concerning the flowering time of teosinte under diverse conditions. The possibility that some of this information may be of use to others suggests its publication. The paper is, therefore, to be considered as a help in the technique of teosinte and maize hybridization rather than a contribution ~to the solution of the physiological problems involved.

A Genetic View Of Sex Expression In The Flowering Plants, R. A. Emerson

Department of Agronomy and Horticulture: Faculty Publications

It seems a conservative statement to say that studies

of the past twenty years among animal forms have

tended increasingly to link the phenomena of sex inheritance

with the behavior of chromosomes. To this

result, cytology and genetics have contributed perhaps

almost equally. The number of forms in which

one sex is known to have a morphologically different

chromosome complex from the other sex are many.

That, with respect to the chromosomes, the female of

certain forms produces gametes of a single kind,

whereas the male produces two kinds, and that in

turn an egg fertilized by one kind of …

Development Of Root And Shoot Of Winter Wheat Under Field Environment, J. E. Weaver, Joseph Kramer, Maud Reed

Department of Agronomy and Horticulture: Faculty Publications

Numerous studies have been made on the winter killing of cereals, but few data are available on their actual growth rates during fall, winter, and early spring. No attempt has been made to correlate growth with environmental conditions, at least in the great wheat belt of the Mississippi Valley and Great Plains. During the fall of 1921 a study of the development of winter wheat both above and below ground was begun. A strain of Turkey Red winter wheat recently developed at the Kansas Agricultural College and known as Kanred was grown.

A plat of one tenth acre of fertile …

Ua3/1/2/1 Letter Re: Evolution Taught At Wku, Wku President's Office

WKU Administration Documents

Letter from WKU president Henry Cherry to Charles McKinney regarding evolution being taught at WKU.

A Study Of The Environmental Conditions Influencing The Development Of Stem Rust In The Absence Of An Alternate Host. Ii. Infection Studies With Puccinia Graminis Tritici Form Iii And Form Ix, George L. Peltier

Nebraska Agricultural Experiment Station: Historical Research Bulletins

Stakman and Levine have shown that Puccinia graminis tritici (Pers.) Erikss. and Henn. consists of a number of biologic forms, which can be determined by their action on different varieties of Triticum species. To date 37 such biologic forms have been identified by them through the parasitic action on 12 differential hosts chosen from a large number of varieties of Triticum species. To determine whether these biologic forms remain constant in their behavior under various environmental conditions, a detailed study of the host-parasite relation was undertaken with 2 of these forms. At the same time an opportunity was afforded to …

Seed Potato Investigations, H. O. Werner, R. F. Howard

Nebraska Agricultural Experiment Station: Historical Research Bulletins

The objects of the investigations reported in this bulletin were:

• To determine the condition of western Nebraska seed stock by the tuber unit method and by comparative trials in western Nebraska and various other points.
• To determine the effect of culture, place, disease, etc., upon seed value.
• To perfect methods of applying results to seed production in western Nebraska.

Ua3/1/2/1 Letters Re: Evolution Taught At Wku, Charles Mckinney

WKU Administration Documents

Letters from Charles McKinney to WKU president Henry Cherry regarding the teaching of evolution at WKU.

Ua3/1/2/1 Letter Re: Evolution Taught At Wku, Wku President's Office

WKU Administration Documents

Letter from WKU president Henry Cherry to Charles McKinney regarding the teaching of evolution at WKU.

Two Fossil Hymenoptera From Florissant (Vespidae, Megachilidae), T. D. A. Cockerell

Co

No abstract provided.

Extension Projects : 1924, Ralph E. Johnston, George H. Valentine, G. S. Weaver, Ralph L. Patty, Turner Wright, Gerald Heebink, H. N. Jones, A. L. Ford, H. D. Mccullough, M. D. Benedict, Clara M. Sutter, Paul J. Scarbro, Azalea Linfield, Helen Day Lorshbaugh, Susan Z. Wilder, Mary A. Dolve

SDSU Extension Circulars

This circular contains an outline of the projects or activities carried on by the Extension Service of the South Dakota State College. These projects represent the combined efforts of cooperating farmers and extension workers to formulate plans that, when put into action, will meet the most urgent local and sectional problems of the state pertaining to agriculture and the rural home. This information is designed for the use of community committeemen, country farm bureau directors, extension agents, and other in planning programs of work for 1924.

Size And Structure Of Leaves Of Cereals In Relation To Climate, William Edward Bruner, John E. Weaver

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

Although a very large amount of work has been done on the variation in form, size, and anatomical structure of native plants grown under different conditions, relatively little attention has been given to similar studies of crop plants. As far as we are able to ascertain, no investigations have been made of variation in the leaves of cereal crops grown under widely different, measured environments.

During the past few years (1920-23), in connection with studies on the development and activities of the roots of crop plants (Weaver, Jean, and Crist, 1922), plant production as a measure of environment (Weaver, 1924), …

Circular No. 48 - Rural Credits In Utah, E. B. Brossard

UAES Circulars

The subject of rural credits is of interest to farmers, bankers, investors, and all others concerned about public welfare. This circular is written for the purpose of giving general information about agricultural credit conditions existing at the present time, with special reference to mortgage credit in Utah and the Federal Farm Loan System as now amended. The passage of the Federal Intermediate Credits Act, approved March 4, 1923 makes this an opportune time to check up on the situation.

Bulletin No. 186 - Irrigation Experiments With Sugar Beets, F. S. Harris, D. W. Pittman

UAES Bulletins

A previous bulletin of this station gives the results of an experiment on the irrigation of sugar-beets continuing for five years. Since this experiment was deemed of sufficient importance to merit our best attention and since the climatic conditions which largely determine what is the best irrigation practice may not for so short a period properly represent the average of the community, it was thought advisable to continue the experiment, with certain modifications, for an additional five years. This bulletin reports the results of these last 5-years' work together with such general conclusions as can be drawn from the entire …

Bulletin No. 187 - Irrigation Experiments With Potatoes, F. S. Harris, D. W. Pittman

UAES Bulletins

In a previous bulletin of this station are given the results of an experiment on different irrigation treatments of potatoes continued for five years. In view of the importance of the potato crop and of the importance of having it properly irrigated it was considered advisable to continue the experiment, with certain modifications based on experience, for a further period of five years. This total period of ten years should include most of the climatic variations which are common in this locality, and by eliminating the more unsatisfactory irrigation systems a closer approximation to the best system should be found. …

The Abortion Problem In Farm Live Stock, L. Van Es

Nebraska Agricultural Experiment Station: Historical Circulars

This casting out of a dead or at least abnormal fetus we call abortion. It constitutes the culminating accident in a process set into motion by disease or injury. To the breeder it is its most conspicuous feature, and it's more or less constant occurrence among live stock warrants us to speak of the abortion problem. It is the purpose of this publication to lay before our Nebraska breeders such information on the subject as can be gathered from the more recent literature and from observations in the field and the laboratory.

A Founder Of American Parasitology, Joseph Leidy, Henry Baldwin Ward

Harold W. Manter Laboratory of Parasitology: Library Materials

A biographical overview of American parasitologist Joseph Leidy and his work. bron September 9, 1823, Philadelphia, Pennsylvania, USA - died 1891.

Conclusion

A detailed study of his writing justifies the statement that no one has yet adequately presented or fully elucidated Leidy's contributions to helminthology and his writing will furnish rich lead to many future workers in this field. How monumental the task of preparing a record of the full life work of this extraordinary man who in the same breath as it were, in a single letter records discoveries of far reaching import on bacteria, amoebae, worms, and fossil …

Propagation And Renewal Of Strawberries, A. L. Ford

SDSU Extension Circulars

During the month of August there usually is a dull period for the strawberry club member. At this time there is nothing new coming up and because of this we feel that this month would be an excellent time to go into the propagation of strawberries and the renewal of strawberry beds. Every club member who intends to grow a few strawberries every year surely will find good use for this information.

Rammed Earth Walls For Buildings, U.S. Department Of Agriculture

Rammed Earth Collection (1923 - 1959)

Earth has been used for building dwellings from time immemorial. One method of use, superior to others, and which was known to the Romans has been preserved by tradition .t o modern times. This method consists of ramming slightly moist, specially selected earth, without the addition of straw or other material, between movable forms, and is known by itsFrench name, " pise de terre," which means "rammed earth." Pise de terre is a reliable building material when properly handled and is admirably adapted to structures on farms distant from transport routes. Little information has been published on rammed earth in …

Viola Grypoceras A. Gray, Albert Newton Steward

Specimens by Name

No abstract provided.

A New Dasymutilla From Arizona, James Chester Bradley, J. Bequaert

Bo

No abstract provided.

Bulletin No. 185 - The Influence Of Nitrogen In Soil On Azofication, J. E. Greaves, D. H. Nelson

UAES Bulletins

Many soils of the arid west have a rich active azofying flora. This is due in no small measure to their composition. They are high in calcium and magnesium carbonate and contain a good supply of available phosphorus and potassium but have a low nitrogen content. They are poor in organic carbon; hence, their native supply of energy is limited. It is well-known that a liberal supply of rapidly decaying organic matter is beneficial, and this is being supplied to some soils in the form of manures. This will increase the nitrogen content of the soil. What effect will this …

The Plains False Wireworm And Its Control, M. H. Swenk

Nebraska Agricultural Experiment Station: Historical Circulars

The last three crops of winter wheat, and especially the crop of 1922-23, have been seriously injured in southwestern Nebraska and especially on the dry land farms of Cheyenne, Kimball, Banner, Morrill, Garden, Deuel , Keith, Perkins, and Hitchcock Counties, by an abundance of hard-bodied, cylindrical, shining waxy yellow, soil-infesting larvae. These greatly resemble wireworms and are often mistaken for them, but they differ conspicuously in being more active and having well-developed, club-shaped antennae, long and stout front legs, and a less flattened body with a distinctly upturned tip. These larvae destroy the planted seed in the fall and eat …

Picking, Marketing And Canning Of Strawberries, A. L. Ford

SDSU Extension Circulars

Some may believe that strawberry picking is not a subject to be taken up for July but let us tell you why we are taking it up at this time. Club members who are planting spring bearing varieties will not get a crop until next June, but those who have planted everbearing varieties should get a fair crop this fall if it is not too dry. We are giving the first year members this information now so that they can use it for their everbearing varieties. This information should be filed away carefully so you can turn to it again …

A Study Of The Tissues Of Leaves Of Certain Angiosperms, Amybelle Halbert Brady

Bachelors’ Theses

The leaves used for the study of the tissues were those of the Oleander, Ficus, Ivy, Cyperus and the Aristolochia. Portions of the leaves used were cut into rectangular pieces, about one centimeter long and one half centimeter wide, each piece including a portion of a large vein and its subsidiary veinlets. The material was placed into chrome acetic acid solution. After twenty four hours it was a shed in running water for twelve hours and then dehydrated by means of alcohol, and was then imbedded in paraffin. The sections used for the study were cut from 12 to 15 …

Vii: Expedition Of The California Academy Of Sciences To The Gulf Of California In 1921: The Bees (I), T. D. A. Cockerell

Co

No abstract provided.

Farm Sanitation, G. S. Weaver

SDSU Extension Circulars

Sanitation means to keep things clean, to be hygienic. Farm sanitation helps to preserve the health of domestic animals and, indirectly, the health of the people that live on the farm. Cleanliness, sunlight, fresh air, and disinfectants are the important factors in sanitation.

Vestigial Pleometrosis In The North American Polistes Pallipes Lepeletier, Joseph Bequaert

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In the October-December, 1919, issue of this BULLETIN my esteemed friend, Mr. Wm. T. Davis, has published some observations of the common American social wasps, a most welcome addition to the scanty literature of the subject in America. Among other interesting points, he relates several cases in which two, three, or four queens of the common Eastern Polistes pallipes Lepeletier ( = metrica Say; variatus Say) had worked together in establishing a new colony, though in this as in other species of Polistes each queen as a rule starts her nest alone.

Bulletin No. 184 - A Farm-Management Study Of The Great Salt Lake Valley, George Stewart

UAES Bulletins

This survey had for its purpose the study of farm organization in Great Salt Lake Valley. It is hoped that some conclusions may have been reached as to how to improve farming conditions. The records were taken during the summer of 1915 and consequently represent the farm business for 1914. Ordinarily the period of time that has elapsed since the records were taken would be too long to justify their being published. In view of the fact, however, that the World War began in 1914 and that its effects on the prices of farm products lasted until 1921, it is …

Improvement Of Small Grains By Pure Line Selection, Dilworth Walker

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The present economic status of grain farming in the United States calls for adjustments in various ways. Legislation, such as price fixing, can do very little. Adjustment of acreage along with improved methods of marketing can do much. But improvement of the grains grown through breeding processes to increase the yields per acre and improve the milling quality, will render a service of permanent value, since all of the results appear in the profit column.

Hybridization Of Wheat, Floyd M. Beach

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The purpose of this paper is to set forth the purpose of wheat hybridization. To do this properly it is necessary to know the history of hybridization of plants. Also to know some of the workers in this field and the hybrids produced by them. In the work at the Experiment Stations the various experimenters have discovered many interesting facts which it is necessary to know and understand. To thoroughly comprehend the work it is also necessary to do the actual processes of the work and to carry the hybrid through several generations and eventually to the goal for which …