Life Sciences Commons^™

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 …

Crop Production In India, J. E. Weaver

Department of Agronomy and Horticulture: Faculty Publications

It is rarely that one finds a book on the subject of agriculture of such broad scope, fascinating interest, and so full of the applications of ecology and physiology as Howard's " Crop-production in India." In every chapter numerous problems of plant growth in relation to environment are brought before the reader in such a stimulating manner that one can scarcely conclude but that ecology will reach its greatest usefulness in the field of general agriculture. It is a book to which every student of environment should have ready access.

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.

The Ontogeny Of The Vascular Elements In Zea Mays, George L. Cross

Electronic Theses and Dissertations

1. The vascular bundles of Zea mays are of the monocot type, except that true amphivasal bundles are found only in the leaves.
2. The xylem and phloem are arranged collaterally, with the xylem occupying the part of the bundle nearer the center of the stem.
3. The xylem is composed of from 2 to 4 protoxylem elements, and two pitted vessels. The elements of the protoxylem are arranged in a radial row, and consist of 1 or 2 annular on the inside, and 1 or 2 spiral elements on the outside. Sometimes the outermost element (in respect to the stem) is a …

The Introduced Plants Of South Dakota, William Houk

Electronic Theses and Dissertations

The vascular plants, native and introduced, in the herbarium of South Dakota State College total 97 families, 511 genera, and about 1279 species. The representation of introduced plants as indicated in the list given below is: 22 families, 75 genera, and 110 species. Only two families have over twelve species; these are Gramineae and Cruciferae, with 30 and 15 respectively.

A Study Of Pollen, Sterility, And Blossoming Dates Of Plum Varieties In The Experimental Nursery At South Dakota State College During The Spring Of 1926, Russell W. Vance

Electronic Theses and Dissertations

The Agricultural Census of the United States for 1920 shows that plums rank second to apples in value in comparison with the other orchard fruits, small fruits and grapes produced in South Dakota. There was an eighty-two percent increase in the value of all orchard fruits produced during the year 1919 over the year 1909. The fact that the majority of the more important commercial varieties of plums are entirely self-sterile and others more or less self-sterile is often one reason for the total or partial failure of the orchard to produce fruit when a plot is planted to one …

A Study Of Certain Physical And Chemical Characteristics Of Flaxseed And Of Linseed Oil, With Especial Reference To Date Of Harvest, Leo F. Puhr

Electronic Theses and Dissertations

From the review of the foregoing literature on flax, it is evident that little work has ever been done on the chemical composition of flax. Most of the work on flax up to the present time has been confined to the diseases of flax, principally the securing of varieties that are resistant to wilt. In an attempt to secure information in regard to the factors affecting the physical characteristics and chemical composition of flaxseed the following work has been done in this experiment: 1. The effect of time of harvesting upon physical characteristics of the seed. 2. The relation of …

The Effect Of Treatment With Ethylene Chlorhydrin Gas Upon The Respiration Of Dormant Potato Tubers, Leon M. Pultz

Electronic Theses and Dissertations

Chemicals have long been in use as mean of eliminating or abbreviating the rest period of various plant organs. Usually, however, they have been in the hands of workers who were interested only in forcing the resting parts into growth and not in determining the physiological effect of the chemicals upon them. Since Appleman (1) presents a very comprehensive review of the earlier literature pertaining to the subject, it will not be again presented here. More recently Denny (4, 5) has given now impetus to this work by demonstrating that ethylene chlorhydrin and various other chemicals will greatly shorten the …

Some Ecological Aspects Of Agriculture In The Prairie, J. E. Weaver

Department of Agronomy and Horticulture: Faculty Publications

It is of more than passing interest that the cereal crops, namely: corn, spring and winter wheat, oats, barley, sorghum, and millet, have their center of greatest production in that portion of the United States originally covered by grassland. In fact, some are grown almost entirely in the grassland region, and other crops, as alfalfa and flax, which are similar in growth habits to wild legumes, wild flaxes, etc., growing among the grasses, also have their greatest acreage in grassland. Likewise, the largest areas of fruit production, including such tree fruits as apples, peaches, pears, and bush fruits as blackberries, …

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.

The Immediate Effect Of Gametic Relationship And Of Parental Type Upon The Kernel Weight Of Corn, T. A. Kiesselbach

Nebraska Agricultural Experiment Station: Historical Research Bulletins

This investigation to determine the relation of the kernel weight of corn to the source of pollen with which it was fertilized has been made to answer several questions of both practical and technical interest: (1) To what extent is kernel weight affected in the current crop by the "breadth of breeding" or the gametic relationship? (2) What is the relation of the diversity of parental type to the immediate effect of foreign pollen upon the kernel weight of corn? (3) Is the immediate effect of cross-fertilization upon the kernel weight of sufficient importance to justify the annual mixing of …

The Differential Reaction Of Strains Within A Variety Of Wheat To Physiologic Forms Of Puccinia Graminis Tritici, T. A. Kiesselbach, George L. Peltier

Nebraska Agricultural Experiment Station: Historical Research Bulletins

Black stem rust of wheat (Puccinia graminis tritici (Pers.) Erikss. & Henn.), which occurs in Nebraska and thruout most of the wheat producing regions of the world, is of a composite nature, in that it consists of a number of physiologic forms which can be determined by their action on different varieties of Triticum species, as shown by Stakman and Levine. The ordinary commercial variety of wheat may likewise be regarded as a mixture, in that it consists of numerous strains, which differ in some more or less important characteristics, as has been frequently indicated in the literature concerning …

Alfalfa Investigations, T. A. Kiesselbach, Arthur Anderson

Nebraska Agricultural Experiment Station: Historical Research Bulletins

The purpose of these alfalfa investigations has been to determine the relation of variety, source of seed, and cultural practice to the yield and quality of hay produced. Due to the high initial cost of seeding, the inconvenience and wastefulness of losing a stand prematurely, and the superiority of properly-made hay, an understanding of these relationships is very important.

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

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 …

The Segregation Of Carbohydrates In Crosses Between Waxy And Starchy Types Of Maize, T. A. Kiesselbach, N. F. Petersen

Department of Agronomy and Horticulture: Faculty Publications

The purpose of this paper is to report the Mendelian segregation of waxy and starchy carbohydrates in both the sporophytic and gametophytic generations of maize. This is of especial genetic interest because the counts of segregate waxy kernels have very commonly been short of the expected numbers, although this character appears to be a simple Mendelian recessive. Collins (1909) was the first to point out the physical difference in the endosperm of waxy and ordinary starchy varieties.

While the exact difference in their chemical nature has not been established, Weatherwax (1922) considered that the waxy carbohydrate was erythrodextrin because of …

Bulletin No. 197 - The Pear Leaf Blister Mite As An Apple Pest, I. M. Hawley

UAES Bulletins

The blister mite is a pest of foreign origin, that has been in the United States for many years. It was introduced into this country, probably from Europe, sometime before 1872, and by 1894 it was rather general in its distribution thruout the United States and Canada. At the present time this mite is a serious pest of apples in many of the fruit-growing sections of Western America. The blister mite was first reported in Utah by Hedrick as early as 1898. During the last few years it has been abnormally abundant in some parts of Utah.

Bulletin No. 196 - The Fruit Tree Leaf Roller And Its Control By Oil Sprays, I. M. Hawley

UAES Bulletins

When the fruit tree leaf roller is present in large numbers in an apple orchard it i the most destructive apple insect in the state. Fortunately, it is not a pest of general occurrence. Tho this insect is known to occur from Cache Valley south to Beaver, serious losses from its ravages have been restricted to occasional orchards within the infested territory.

Bulletin No. 195 - Field Studies Of Sugar-Beet Nematode, George Stewart, A. H. Bateman

UAES Bulletins

The sugar-beet nematode has now become of importance in Utah. It occurs in spots in practically all of the older beet-growing districts and in a few parts of the state in much larger areas. The intensity of infestation varies from mere traces to nearly complete occupation. One of the areas of severe infestation in Utah on a large area is in the Lewiston district, of northern Cache Valley. The survey here reported was undertaken in order to find the extent of nematode infestation in Cache Valley and the possibility of its control by ordinary cultural practices.

The Spindle-Tuber Disease As A Factor In Seed Potato Production, H. O. Werner

Nebraska Agricultural Experiment Station: Historical Research Bulletins

The lines of experimentation that supplied the data herein reported, stated in very general terms, were as follows: (1) Tuber-line selection studies (2) Relation of environmental conditions to seed-potato production (3) Seed-potato strain trials of certified and uncertified stock (4) Spindle-tuber transmission experiments. Most of these general lines of experimentation will not be completely discussed as a unit in any one part of the bulletin. For the sake of clarity, consecutive thought, and elimination of repetition, data will be selected from any experiment for insertion and discussion under the most logical heading in any part of the bulletin. Unless otherwise …

Correlated Inheritance In Wheat, George Stewart

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Since the rediscovery of Mendel's law in 1900, there have been many studies of inheritance in wheat. Of these rather numerous investigations, however, only a few have consisted of correlated studies of various characters on the same plant.

Inheritance of awns and of spike density have received some attention but the studies have hardly more than indicated the problem. Both have been thought by some to be rather simple in their inheritance, and in some crosses without doubt such is the case, but lately there has come a recognition of considerable complexity.

Density. As here used, "density" refers to …

The Effect Of Alternate Freezing And Thawing On Impermeable Alfalfa And Dodder Seeds, A. R. Midgley

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

It is surprising to know the small amount of work that has been done on alternate freezing and thawing of seeds. Many experiments, however, have been conducted to see the effect of very low temperatures on seeds and to notice the effect it had on their vitality. Some experimenters subjected seeds to temperatures as low as liquid hydrogen with very interesting results but in very few cases, if any, was the effect of alternate freezing and thawing studied.

The work that follows deals directly with the effects of alternate freezing and thawing on impermeable seeds of alfalfa and of dodder. …

Circular No. 61 - Rules And Regulations For The Third Utah Intermountain Egg-Laying Contest, Byron Alder

UAES Circulars

This contest is located on a part of the Utah Agricultural College Farm near the experimental poultry yards. It is managed by the Poultry Department with an experienced poultry raiser in direct charge of the feeding and care ,of the hens in the contest. The buildings, grounds, and fences were built and furnished by the Experiment Station.

Circular No. 60 - Seed-Potato Treatment: For The Control Of Four Common Diseases Rhizoctonia, Scab, Blackleg, Dry-Rot, B. L. Richards

UAES Circulars

Potato diseases are a constant menace to the Utah potato crop. During the 4-year period from 1920 to 1924 losses sustained from disease averaged 19.5 per cent, or approximately one-fifth of the entire state crop. This means that every year a large percentage of the seed planted is useless and that one-fifth of every acre planted to potatoes is wasted. Again, labor in the way of planting and in cultivation is used to poor advantage, and finally the grower suffers a direct financial loss which frequently eats up his expected profit.

Circular No. 59 - Control Of Stinking Smut Of Wheat With Copper Carbonate, B. L. Richards, A. F. Bracken

UAES Circulars

Stinking smut or bunt of wheat is an ever-present and destructive disease in the wheat fields of Utah. During the past season (1925) this disease was especially prevalent, causing losses in certain fields of from 25 to 50 per cent, not counting the loss to the grower in reduced grade of grain. In the threshing of smutty wheat there is also the risk of loss from smut explosion. Almost every season cases of this sort are reported. In addition of all of the wheat tested by the U. S. Grain Inspector at Logan for Northern Utah and Southern Idaho 30 …

A Text And Manual Of Timpanogos Mosses, Seville Flowers

Theses and Dissertations

This present paper is an attempt to open the field of bryology in the state of Utah. It is necessarily a limited treatment both from the standpointof the number of species and the area. It represents the efforts of one summer's collection and the preparation of the manuscript and illustrations. The collection was taken at Mount Timpanogosby the students of the Alpine Summer School of the Brigham Young University during the 1925 session.

Circular No. 58 - Potato Production In Utah, George Stewart

UAES Circulars

Potatoes were the first crop planted in Utah. In July 1847, the Mormon pioneers turned the water from City Creek over the parched land near what is now the center of Salt Lake City. The ground was then broken and sown at once to potatoes. Only a small yield was obtained but this helped materially to eke out the meagre food supply until the harvest of 1848. During the several hard years that followed potatoes were among the most important foods for the pioneer settlers. Since then they have held a prominent place in the agriculture of the state.

A Study Of The Environmental Conditions Influencing The Development Of Stem Rust In The Absence Of An Alternate Host. Iv. Overwintering Of Urediniospores Of Puccinia Graminis Tritici. V. The Period Of Initial Infection Of Urediniospores Of Puccinia Graminis Tritici On Wheat. Vi. Influence Of Light On Infection And Subsequent Development Of Urediniospores Of Puccinia Graminis Tritici On Wheat, George L. Peltier

Nebraska Agricultural Experiment Station: Historical Research Bulletins

IV. In order to ascertain whether the urediniospores of Puccinia graminis tritici (Pers.) Erikss. and Henn. overwinter under the environmental conditions prevailing at Lincoln, Nebraska, a series of experiments was carried out extending over a period of 5 years. The results of this investigation are briefly presented. V. By the period of initial infection is meant the time required by a pathogen after it reaches a susceptible plant part to enter the tissues. To determine what the period of initial infection of urediniospores of Puccinia graminis tritici might be, experiments were undertaken during the season of 1923-24 using urediniospores of …

Winter Wheat Investigations, T. A. Kiesselbach

Nebraska Agricultural Experiment Station: Historical Research Bulletins

Twenty years of wheat breeding, consisting chiefly of the isolation and testing of pure lines, has now been conducted at the Nebraska Agricultural Experiment Station. It is the purpose of this paper to report the conduct and results of this work. The resulting strains are compared with the best other wheats available from Nebraska and other sources. The effects of a number of cultural practices related to the preparation of seed, seeding, treatment of the growing crop, and harvesting are also presented. Some consideration is given to the experimental technique of the comparative tests.

Circular No. 57 - Economy In Harvesting Sugar-Beets, George Stewart

UAES Circulars

During sugar-beet harvest the farmer has two big opportunities to increase his income from the beet crop. No great amount of extra labor is entailed in either case, and yet the profits are written in large figures. To neglect getting the most from beets at harvest time after a toilsome and expensive production seems wasteful. Farmers are urged to give full consideration to these two phases of beet harvest: (1) The making of beet-top silage from fresh beet tops. Large yields of good quality feed may thus be secured. (2) The preventing of losses in tonnage due to evaporation. Poor …