Life Sciences Commons^™

The Effect Of Ddt Residue On The Composition And Digestibility Of Alfalfa Hay, Than Myint

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

DDT (2,2 bis (p-chlorophenyl) 1,1,1-trichloroethane) was first synthesized in 1874 by Seidler in Switzerland, however, its effectiveness as an insecticide was not known until about 1942. The active principle was first known as G.H.B. (Gesarol-Neccid Base): but in 1943 DDT was suggested as an abbreviation for Dichlore Diphenyl Trichloroethane (Kaaegie, 1946). In fact DDT, as a powerful insecticide is one of the developments made during World War II. The importance of DDT in the control of the common insect enemies of mankind, such as mosquitoes, flies, moths, and many agricultural insect pests is realized more day by day. Many studies …

A Study Of A Heron Nesting Colony, Linden J. Leatham

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Herons are well known because of their gregarious nesting habits. Like many others of the lower orders of birds they nest together in pure or mixed colonies of many different combinations and under diverse living conditions. The population of different colonies may vary from a few pairs to many thousands of pairs depending upon the nature and extent of the breeding area, the food supply available and the protection afforded either by natural or artificial means.

In Utah and adjacent areas of bordering states, many types of heron associations have been studied and reported by ornithological workers. Breeding colonies of …

A Survey Of The Native Rabbits Of Utah With Reference To Their Classification, Distribution, Life Histories And Ecology, Reuel G. Janson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Rabbits and hares, both popularly referred to as rabbits, occupy a very prominent position in the wildlife of Utah. Over much of the state, they form the most conspicuous faunal group, and between the lowest portion of the state to above timberline on the highest mountains there are very few areas entirely devoid or their presence. There is great variation, however, in their abundance, both between localities and times. In some areas, rabbit populations often attain amazingly high numbers to the delight of sportsmen and the dismay of farmers.

Wool Scouring Tests In Utah, Alma C. Esplin

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Wool as it is shorn from the sheep, is known as grease wool. The first step in the manufacturing of wool is scouring, or removal of all grease and foreign matter. Within any given grade, as determined by length of staple and fineness of fiber, the yield of clean wool is the primary factor in determining the value of the original grease wool. The price of scoured or clean wool is multiplied by the percentage yield of clean wool to determine the value of the grease wool.

Comparison Of Various Types Of Milk Sampling Devices, William A. Hoskisson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The importance of an accurate measurement of fat in milk deliveries is fully appreciated by most producers and plant operators. Since milk is purchased on a fat basis, the accuracy of the procedure used in sampling and testing the milk has often been questioned by both the buyer and seller.

A composite sample to be theoretically correct, should consist of aliquot portions of the milk shipments represented. Where aliquot portions are to be taken, a milk thief is commonly suggested. This device takes a vertical column of milk from the weigh tank. The idea is that the height of the …

The Relation Of Some Physical And Chemical Factors Of The Soil To The Productivity And Distribution Of Certain Waterfowl Food Plants At The Bear River Migratory Waterfowl Refuge, Grant Hortin Jensen

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Within the last few years several areas within the state of Utah have been and are being developed for the conservation of migratory birds. Of utmost importance in this respect is the management of these areas so as to obtain a sufficient supply of rood plants for use by water fowl. Previous work done at the Bear River Migratory Waterfowl Refuge shows that the productivity of aquatic rood plants, chiefly Potamogeton pectinatus L. and Ruppia maritima L. varies with different localities and that these differences could not be attributed to chemical conditions of the water, i.e., dissolved oxygen, alkalinity, and …

Utah State Agricultural College Graduates Now Living In Other States, Robert Dawson Simpson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

This is a study of graduates of the Utah State Agricultural College who have left Utah and are now residing elsewhere. Inquiries by faculty members and interested alumni, as well as the writer's own interest in the subject of migration, prompted the organization of this study.

The immediate reason for the inquiry was an enlarging interest on the campus concerning the present whereabouts of graduates who have left the state. When present residence was ascertained, other questions arose. What kind of employment had migrating graduates secured? What major interests were had? What important voluntary public services are graduates rendering to …

Trichomoniasis Of The Utah Agricultural Experiment Station Dairy Herd, Rue Jensen

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Bovine trichomoniasis is a venereal infection that reduces the fecundity of cattle. It is caused by Trichomonas foetus (Riedmuller), a flagellated protozoan which inhabits the genital tract, causing inflammation and partial sterility. Both sexes are susceptible to infection. In females it is usually of short duration and frequently terminates spontaneously following abortion. In males the disease has both acute and chronic stages. During the acute stage the prepucial membranes become inflamed and a muco-purulent discharge develops in which trichomonads are abundant. In the following chronic stage symptoms disappear, but the animal remains a carrier and is a dangerous source of …

The Feeding Value Of Certain Duck Food Plants Of The Bear River Migratory Bird Refuge As Determined By Chemical Analysis, Dale Clair Christensen

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The study of bird feeding problems has become a prominent factor in wild life management. This is true especially with respect to the evaluation of recently established migratory bird refuges. In 1929 the Federal Government assumed control of a large area of land located on the Bear River Bay of Great Salt Lake for the purpose of providing a sanctuary for water fowl. Dykes were built and the areas inside these dykes flooded with fresh water from Bear River. During subsequent years aquatic and marsh plants* developed abundantly and apparently have provided satisfactory feeding and nesting grounds for migratory birds. …

Bird Studies Of The Bear River Marshes, Ernest W. Parkinson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The establishment of the Bear River Bay Bird Refuge has created for the state of Utah an immense and valuable biological field, a veritable paradise for naturalist and sportsman alike. The naturalist wants a place to study wild life and the sportsman desires game. With the proper control of open seasons on wild fowl the hunting instinct and incentive for the sport should be satisfied for the sportsman. To the naturalist this region will open up bountiful treasures of knowledge that is to be gained only by intense and prolonged scientific study.

Within this new field, and the limited time …

A Study Of Bull Associations, Arthur J. Morris

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

"A cooperative bull association", according to the United States Department of Agri culture, is "a farmers' organization formed for the purpose of joint ownership, use, and exchange of high class, purebred dairy bulls."

The members of the association are divided into three or more groups of neighboring farmers, each group being known as a block. A block may consist of one herd or several herds and contains from 40 to 60 cows. One bull is used in each block, and in order to prevent inbreeding, each bull is moved to another block every two years. If all the bulls live …

Bulletin No. 135 - A Study In Annual Egg Production: Based On The Records Of A Flock Of Seven-Year-Old Hens And Their Progeny, E. D. Ball, Geo. Turpin, Byron Alder

UAES Bulletins

Experimental work in breeding for egg production was started with this flock of Single Comb White Leghorns in 1907. The flock of 1907 was hatched from eggs from a small flock that had been introduced into the plant two or three years before.

After two years' records of these flocks had been completed and studied it was found that nearly three-fourths of the first flock had made better records the second year than they did the first and that there was a great variation in the two years' records of individual hens. This raised the question of whether the first …

Bulletin No. 127 - Report Of The Richmond-Lewiston Cow Testing Association, W. E. Carroll

UAES Bulletins

The function of all domestic animals is to utilize the coarse rough reeds and transform them into something useful to mankind, either food, clothing, or energy. The animal thus acts as a concentrator for low grade ores, so to speak. The class of animals which will produce most human food, clothing, or energy for man from a given amount of feel--other cost being equal--is the most economical and the one which will remain longest with us as population becomes more dense and the question of food supply becomes keener.

Experiments have shown the dairy cow to be probably the most …

Bulletin No. 107 - Improvement Of Utah Horses, John T. Caine Iii, H. J. Frederick

UAES Bulletins

Horse breeding in Utah, with some exceptions, has been carried on in a hap-hazard manner, and unsound horses of doubtful breeding have been purchased at high prices and have proven of little value. Where good blood has been introduced the temporary improvement has been marked, but as this work has not been followed up with care, results have not been lasting.

In spite of bad breeding, however, the standard of Utah horses has been advancing so that in western markets they command high pries. The climate, soil, feed and general conditions throughout the state make it an ideal place for …

Bulletin No. 102 - Poultry Experiments, James Dryden

UAES Bulletins

There are many problems connected with the housing of poultry. Among them the question of egg fertility is one of the most important. We have begun investigations at this Station to learn if possible what kind or method of housing is most conducive to a high percentage of fertility in the eggs. It is a serious question with many poultrymen how to maintain the percentage of fertile eggs, and there have been cases where the poultryman has been driven out of the business because of inability to renew his flock. There is little doubt that the artificial methods, both in …

Bulletin No. 96 - Care Of Milk On The Farm And The Manufacture Of Butter And Cheese, R. W. Clark

UAES Bulletins

Dairying is one of the most profitable lines of agriculture in Utah. Ever since the establishment of the dairy industry in the State, the demand for Utah butter and cheese has been strong and prices have averaged good. A good article will always sell at top price; a poor article may sell at a good price when the demand is strong, but it will not sell at a good price, if at all, when the demand is weak. High prices are undesirable at any time if they create a tendency to put out a poor article. The success of any …

Bulletin No. 92 - Poultry Experiments, James Dryden

UAES Bulletins

This bulletin reports experiments extending over several

years on the following subjects:

1. The egg-type in hens.

2. Breeding to increase egg yield.

3. Cost and profit of egg production.

4. Weight and cost of food eaten.

5. The value of exercise for the laying hen.

6. The relative value of different breeds.

7. The most profitable age of the hen.

8. The relative value of different forms of animal food.

9. The value of fat in poultry foods.

10. Feeding color into the egg.

11. Incubator experiments.

12. Tests of evaporation of eggs during incubation.

13. Tests of carbonic …

Bulletin No. 90 - Feeding Beet Molasses And Pulp To Sheep And Steers, Lewis A. Merrill, R. W. Clark

UAES Bulletins

Very few stockmen possess a knowledge of the value of beet pulp and beet molasses as animal food. Very little is known of the food value of molasses, but much information has accumulated, from time to time, concerning the value of pulp as stock food. The most authentic data at hand concerning the food value of pulp come from our experiment stations. To emphasize the value of pulp with the view to encourage small farmers to use it and thereby strengthen the live stock industry of the State, the results obtained by some of our experiment stations are given in …

Bulletin No. 82 - Feeding Beet Pulp To Steers And Sheep, R. W. Clark

UAES Bulletins

For the last two winters feeding experiments have been carried on by this Station to ascertain the value of beet pulp and beet molasses as food for sheep and steers. In a feeding test made with sheep two years ago, the results of which are reported in bulletin No. 78, sugar beet pulp and sugar beet molasses gave profitable returns. When lucern and pulp were fed, one pound of gain was made from 7.95 pounds of lucern and 17.86 pounds pulp. One hundred pounds of increase was made at a cost of $2.48 and pulp had a value of $1.86 …

Bulletin No. 94 - Summary Of Pig Feeding Experiments At The Utah Experiment Station From 1890 To 1902 With Deductions From The Same, F. B. Linfield

UAES Bulletins

The Utah Experiment Station has conducted a large number of feeding experiments with animals, the most extensive work in this direction being with hogs. Since the station was organized, over one hundred tests of various rations have been made and over three hundred hog;s have been fed. The results of these feeding tests are scattered through many hundred pages of reading matter in the station publications. As the continuation of these experiments fell upon the writer, it was decided to investigate thoroughly the work already done at the station and to tabulate the results for study. A summary of the …

Bulletin No. 67 - Poultry Experiments, James Dryden

UAES Bulletins

The results of the third year's work in egg production at this Station, together with the summing up of the results of the three years, are given herewith. The third year's work began Nov. 7,1898, and ended Nov. 1,1899. Some of the experiments originally planned have run the full period of three years. In addition to a continuation of the original work a set of feeding experiments was conducted during the third year. This latter work was made possible by the erection of an addition to the poultry house which doubled the experimental capacity of the building and made possible …

Bulletin No. 61 - Alfalfa Or Lucern: The Cutting Time. Its Feeding Value., Luther Foster, Lewis A. Merrill

UAES Bulletins

These experiments, as originally planed, had for their object the determination of the best time to cut alfalfa in order to secure the most profitable annual yield, its chemical composition, digestibility and the results of feeding trials being considered. A comparison of the yield and feeding value of the first, second and third crops was also made a part of the investigation, and as with the different cuttings, the composition and digestibility formed a part of the work. In conducting this experiment to determine the comparative feeding value of the various cuttings and of the different crops of alfalfa, some …

Bulletin No. 60 - Poultry Experiments, James Dryden

UAES Bulletins

The experiments in egg production outlined in Bulletin No. 51 of this Station, were, in the main, continued during the year ending November 7, 1898. The results of this second year's work are reported herein.

Bulletin No. 57 - By-Products Of The Dairy, F. B. Linfield

UAES Bulletins

Soon after becoming connected with the Station, the writer, from observations made in various parts of the State, was impressed with the necessity for investigation looking to the profitable disposal of the by-products of the dairy, both at the factory and on the farm. The common method at the factories seemed to be to feed hogs on milk or whey alone, and where grain was fed, it was only given to finish the hog for market. This method of management did not appear to be successful, for it generally took the whole season to get one crop of hogs ready …

Bulletin No. 54 - Cattle Feeding, Luther Foster, Lewis A. Merrill

UAES Bulletins

For three successive seasons, just preceding the work herein detailed, experiments had been conducted at this Station for the purpose of determining the comparative yield and feeding value of early, medium and late cut lucern, also of the first, second and third crops, the object being to decide, by chemical tests and feeding trials, at just what period of its growth lucern should be cut for the best results, and, pound per pound, the relative value of the different crops.

Bulletin No. 51 - Poultry Experiments, James Dryden

UAES Bulletins

In November, 1896, experiments in egg production were begun at this station.

Bulletin No. 43 - 1. Dairy Herd Record For 1984-95. 2. Winter Feeding Experiments With Dairy Cows. 3. Some Suggestions On The Building And Equipment Of Factories., F. B. Linfield

UAES Bulletins

The Dairy Department of this Station was fully organized by June 1894. The latter part of 1893 and early part of 1894 were devoted to fitting up the dairy rooms and getting the' necessary appliances and machinery in place. As our dairy herd was too small for experimental work, it was decided during the spring of 1894 to increase the number to fifteen head. The selection and purchasing of those cows were left to the writer.

Bulletin No. 42 - Creaming Experiments, F. B. Linfield

UAES Bulletins

During the summer of 1894, before our hand separator was fitted with power attachment, the writer found it scarcely practicable to run the separator, so that most of the milk was skimmed by deep setting. Although the usual methods of procedure were practiced, it was found impossible to get results that were satisfactory, or that would approximately compare with those reported from many eastern stations. Because of this and because ' the larger proportion of our dairymen use some method of setting, it was decided to undertake a series of experiments that might throw some light upon the subject. As …

Bulletin No. 40 - The Economic Production Of Pork, A. A. Mills

UAES Bulletins

This bulletin contains the detailed results of two years' work along the lines indicated, and a summary of the work of four years as far as it has been carried along these same lines.

In the summer of 1894, twelve lots of pigs were selected. They were purchased in Cache valley, and were a fair average of the pigs raised here. It was originally intended to put three pigs in each division, but just at the time of beginning the experiment it was difficult to procure enough animals of the proper age and size, so that the lots contained but …

Bulletin No. 36 - Relative Value Of Corn And Oats For Horses, A. A. Mills

UAES Bulletins

This Bulletin reports the continuation of the study of the best nutritive ratio for horses under moderate work. The experiment was so arranged that a direct comparison could be made between oats and corn as the principal grain ration. The work was planned by Prof. J. W. Sanborn, who was then Director of the Station.