Digital Commons Network^™

Impact Of Seed Consumers Desert Biome, M. Bryant, D.J. Depree, S. Dick-Peddie, P. Hamilton, W.G. Whitford

Progress reports

No abstract provided.

Plant Food Preferences Of Two Sympatric Rodents And Their Potential Impact On A Great Basin Shrub Community, E.L. Becker Ii, D.F. Balph

Progress reports

No abstract provided.

Programming Phase Of Water Response Ecosystem Model: V. Annual Plant Submodel, B. J. Gilbert

Progress reports

No abstract provided.

Conceptualization And Early Development Of A Water Response Ecosystem Model, D. C. Wilkin, P. W. Lommen, J. V. Robinson, G. S. Innis

Progress reports

No abstract provided.

Data Search For Aquatic Model, J. Perry Ii, G. W. Minshall

Progress reports

No abstract provided.

Further Development Of A Stream Ecosystem Model, J. H. Wlosinski, G. W. Minshall

Progress reports

No abstract provided.

Impact Of Seed Consumers In A Desert Ecosystem, W. C. Whiteford

Progress reports

No abstract provided.

Interaction Between A Fossorial Rodent (The Pocket Gopher, Thomomys Bottae) And A Desert Plant Community, R. E. Dingman, L. Byers

Progress reports

No abstract provided.

Effects Of Rodents On Germination Of Desert Annuals, O. J. Reichman

Progress reports

No abstract provided.

Effects Of Rodents On Germination Of Desert Annuals, O. J. Reichman

Progress reports

No abstract provided.

Factors Affecting Seed Reserves In The Soil Of A Desert Ecosystem, R. M. Chew, J. F. Nelson

Progress reports

No abstract provided.

Food And Distribution Of Underyearling Brook And Rainbow Trout In Castle Lake, California, Wayne A. Wurtsbaugh, R. Brocksen, C. Goldman

Watershed Sciences Faculty Publications

A difference was found in the summer distribution of underyearling brook trout, Salvelinus fontinalis (Mitchill), and planted rainbow trout, Salmo gairdneri Richardson, in Castle Lake, California. Brook trout underyearlings oriented to the bottom and were found primarily in shallow water on the eastern shore of the lake near springs. The rainbow trout underyearlings were more pelagic and were found in the littoral areas along the entire shoreline. Gravimetrically, the food eaten during the summer by brook trout underyearlings was 13% terrestrial, 11% limnetic, and 76% benthic. Rainbow trout ate 15% terrestrial, 15% limnetic, and 70% benthic food. In summer, rainbow …

Wood And Wood-Based Residues In Animal Feeds, Andrew J. Baker, Merril A. Millett, Larry S. Satter

Aspen Bibliography

Cellulose is the most abundant, naturally renewable material on earth. It, and hemicellulose, make up about 70% of the dry weight of shrubs and trees. The cellulose of woody plants, however, is largely unavailable to ruminants because of the highly crystalline nature of the cellulose molecule and the existence of a lignin-carbohydrate complex. If convenient ways can be found to enhance the availability of wood cellulose to enzymatic or microbiological systems, wood residues could provide an additional renewable energy feed supply for a world that can maintain no contingency reserve of feedstuffs. It would permit utilization of the large quantities …

A Field Technique Measuring Virus Decay And Potential Aerosol Hazard From Wastewater Sprinkler Irrigation, Michael F. Torpy, Robert A. Gearheart, J. Clifton Spendlove, Rex S. Spendlove

Reports

The increased use of domestic wastewater for irrigation purposes has stimulated a growing practice of sprinkler irrigating from oxidation ponds and other domestic wastewaters. Aerosols generated from these sprinkler irrigation systems may contain potentially hazardous pathogens. Subsequently, the aerosols can contain infective viruses which can be carried through the air to surrounding populations. Thus, a public health hazard can be created by sprinkler irrigating domestic wastewater. This study is an investigation of a means by which the virus decay rate of viruses in aerosols and the potentials hazard of sprinkler irrigation aerosol clouds may be examined. A means of injection …

A Technique For Predicting The Aquatic Ecosystem Response To Weather Modification, Eugene K. Israelsen, David R. Bernard, Thomas M. Twedt, Henry M. Runke

Reports

In the past, considerable effort has been spent on the development of techniques for increasing precipitation from a given cloud formation. However, little attention has been given to identifying and evaluating the impacts of cloud seeing activities on the aquatic ecosystems within the affected areas. The objective of this study was to apply the simulation technique to predict the impacts of cloud seeing on the aquatic ecosystem within the area subject to weather modification. A small mountain watershed near Logan, Utah, was selected for the study. Measurements were made of the significant parameter levels under current conditions. A hydrologic and …

A Study Of Alternative Methods To Modernize Water Institutions And Eliminate Problems Of Multiple Jurisdiction And Conflicting Objectives, Frank W. Haws

Reports

No abstract provided.

Nutrient Dynamics And Gas Production In Aquatic Ecosystems: The Effects And Utilization Of Mercury And Nitrogen In Sediment-Water Microcosms, D. B. Porcella, V. D. Adams, P. A. Cowan, S. Austrheim-Smith, W F. Holmes, J. Hill Iv, W. J. Grenney, E. J. Middlebrooks

Reports

Sixteen sediment-water microcosms designed to allow complete gas, liquid, and solid mass balances of gases, nutrients, and mercury were studies under dark conditions or varying light intensity for a period of 189 days. Results indicated that the microcosm technique is a very sensitive method of analyzing microbial dynamics in sediment water systems. Gas quantity and composition changes were easy to monitor and were especially sensitive to light and nutrient variations. Nitrogen fixation occurred in all lighted systems (blue-green algae nitrogen fixers, Anabaena, and others) and was adequate to insure that no nitrogen limitation occurred even though nitrogen limitation was imposed …

Colorado River Regional Assessment Study Part One: Executive Summary, Basin Profile, And Report Digest, Utah Water Research Laboratory

Reports

No abstract provided.

Urban Storm Runoff Inlet Hydrograph Study, Volume 5, Soil-Cover-Moisture Complex: Analysis Of Parametric Infiltration Models For Highway Sideslopes, Cheng-Lung Chen

Reports

The main objective of this study is to develop an accurate design method for computing inlet hydrographs of surface runoff, with average recurrence intervals of 10, 25, and 50 years, from typical urban highway by flood routing technique. The boundary-value problem of one-dimensional infiltration resulting from rainfall is formulated and solved numerically on a digital computer. The numerical solutions of this idealized mathematical model is used as a basic testing tool in the subsequent analysis of various parametric infiltration models including the Green-Ampt, Kostiakov, Philip, Horton, and Holtan equations. The time of ponding is shown to be the most important …

Watershed Management On Range And Forest Lands Proceedings Of The Fifth Workshop Of The United States/Australia Rangelands Panel, R. J. Mcconnen, B. S. Sadler, Colin L. Pierrehumbert, Kenneth G. Renard, Donald L. Brakensiek, Alden R. Hibbert, T. Talsma, C. W. Rose, Ronald E. Sosebee, Richard Meeuwig, Paul Packer, Walter C. Boughton, J. Paul Riley, Richard H. Hawkins

Reports

Preface: The U.S.-Australia Cooperative Rangeland Science Program In October 1968 the governments of the United States and Australia entered into an agreement for the purpose of facilitating close cooperative activities between the scientific communities of the two countries. The joint communique issued at that time designated the U.S. National Science Foundation and the Australian Commonwealth Department of Education and Science as the coordinating agencies. Both countries were to encourage binational teamwork in research, interchanges of scientists, joint seminars, and exchanges of information. A United States-Australia Rangeland Panel was established in December 1969 to further cooperation between the two countries in …

Utah Science Vol. 35 No. 4, December 1974

Utah Science

Food for Consumers - A living for Producers Doyle J. Matthews 107

Goals for Utah Agriculture D. Wynne Thorne 109

Ag Research in the College of Engineering E. J. Middlebrooks 115

Family Awareness Phyllis R Snow 117

Utah - and the Nation's Needs Thadis W. Box 119

The Importance of Basic Research Ralph M . Johnson 122

Utah's Tourism and Recreation Potential John D. Hunt 126

Agriculture Research Covers Utah 133

New Station Director: Doyle J. Matthews 136

Food, Nutrition, And Health, Problems And Prospects, D. K. Salunkhe

Faculty Honor Lectures

Food, nutrition, and health - and their complex interrelationships - are necessities of life. Basically, nutrition depends on food; health depends on nutrition. Everyone needs to have enough good quality food to sustain himself. Satisfying that need on a world basis must be of concern to each of us.

Although accurate data are lacking, it is estimated that more than two-thirds of today's world population is afflicted by hunger and/ or malnutrition. Almost 300 million children are suffering physical and, probably, mental damage because of insufficient food. This evidence points to one of two conclusions: we have either too many …

Utah Science Vol. 35 No. 2, June 1974

Utah Science

The Blue Grouse in Northern Utah David Weber, Barry Barnes, and Jessop B. low 43

An International Approach for Improving Utah's Sheep D. W. Thorne, W. C. Foote, and J. J. Spillett 47

Cardon and Hansel - new smut resistant winter wheat varieties Wade G. Dewey 53

Unsprayed Fruit Trees - how much of a problem to commercial orchards? Donald W. Davis 56

Assessing Feed Quality R. Gaurth Hansen and Lorin E. Harris 58

Veterinary Medicine Helps Humans N. C. Leone 62

Agriculture Wastes and Energy - some problems and potentials J. Clair Batty 66

Science Shorts 52, 71

New …

Role Of Cytoplasmic Microtubules In The Control Of Normal Spermiogenesis In Drosophila Melanogaster, Richard F. Wilkinson Jr.

Biology

An experimental study was conducted to determine the role of cytoplasmic microtubules in normal spermiogenesis of Drosophila melanogaster. An earlier study of mutant ms(3)10R of Drosophila presented evidence that suggested a direct role of cytoplasmic microtubules in sperm development. This finding provided some direction toward the clarification of currently controversial and conflicting hypotheses; are cytoplasmic microtubules necessary subcellular organelles during sperm maturation? These conflicting hypotheses are particularly opposed on the role of microtubules in the normal modeling of the sperm nucleus. One hypothesis states that cytoplasmic microtubules around the nucleus ("manchette" microtubules or nuclear-sheath microtubules) apply a modeling …

Social Organization Of The Cassin's Finch In Northern Utah, Fred Burton Samson

Biology

Cassin's Finch populations were studied in northern Utah during three breeding seasons and three winters to determine patterns of breeding, factors limiting breeding population size, social dominance and individual survival in winter flocks, and interrelationships of social systems between the seasons. Population levels on the breeding area, Beaver Mountain, Cache County, exhibited marked fluctuations from year to year; and males significantly outnumbered females in these populations. Cassin's Finches nested in colonies that varied in size from 9 to 20 nests. Adult males in reddish plumage predominated in breeding; but, if lost from the population or experimentally removed by shooting, they …

The Effects Of Regulated Livestock Grazing On Waterfowl Production, Mark A. Hilliard

Biology

Waterfowl nesting was studied on the Salt Creek Waterfowl Management Area in Box Elder County, Utah, during 1970 and 1971. Ungrazed nesting habitat was studied in 1970 which was subsequently grazed the following winter. Nesting in 1971 was studied on the same area for variations attributable to effects from grazing. During winter 1969-70, cattle were held in pilot plots to study their behavior during winter-grazing on marshlands. Ten plots were grazed at varying rates during winter 1970-71. Warming mid-January weather thawed much of the marsh both years of the study and cattle were restricted to drier sites, resulting in severe …

Effects Of Fertilizers On Cultured Salt Marsh Plants, Ruppia And Chara, Scott Marshall Stenquist

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Widgeongrass (Ruppia maritima), muskgrass (Chara Sp.), and midge larvae (family Chironomidae) were grown under controlled greenhouse conditions using a solution of Logan tap water, 3000 ppm. sodium chloride, and an algicide-fungicide inhibiter. Soil, vegetation, and invertebrates came from a spring-fed marsh in western Utah. Ammonium sulfate, treble superphosphate, and sewage sludge fertilizers were applied to the plants at 5, 10, 20, 25, 50, 75, 100, and 300 pounds per acre equivalents of ammonium sulfate; 5, 25, 50, 75, 100, and 300 pounds per acre equivalents of treble superphsophate; and 5, 25, 100, 200, 300, 400, 500,700, and …

The Indian Student Placement Program As A Means Of Increasing The Education Of Children Of Selected Indian Families, Geraldine T. Lindquist

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The purpose of this paper was: (1) To compare the number of years of formal education of participants in the Latter-Day Saints Indian Student Placement Program with those that had not participated. (2) To see if the number of years a student participates in the Indian Student Placement Program had an effect on the amount of formal education he receives. (3) To compare the future educational and employment plans of the two groups. (4) To see how students evaluated their educational program.

The results showed no differences between the two groups in number of years of formal education, future educational …

The Production And Prevention Of Stomach Ulcers In Rodents, Eric H. Rudrud

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

Rats given L-Ascorbic Acid in their drinking water prior to and during starvation did not develop severe ulceration in the glandular portion of their stomachs. Control rats which were either nontreated or given deactivated L-Ascorbic Acid developed severe stomach pathology on the starvation regimen.

The present study was based on the finding that food deprivation results in severe rumenal ulceration in rats. Given that L-AA is essential in maintaining tissue integrity and that ulcers are examples of tissue degeneration, the L-AA in large amounts could retard, or prevent, the formation of starvation induced stomach ulcers in rats.

The results show …

A Comparative Study Of Gpa Predictability Using The Japq And The Svib, Kathleen A. Peterson

All Graduate Theses and Dissertations, Spring 1920 to Summer 2023

The purpose of this thesis was to compare the results from two vocational interest blanks, the Job Activity Preference Questionnaire (JAPQ) and the Strong Vocational Interest Blank (SVIB) in the prediction of grade point averages (GPA) for university students. An investigation was also made to determine if the variable vocational interest would contribute to a multiple r composed of American College Test (ACT) scores and GPA.

One hundred students were administered both instruments and predictions made of their GPA's after the completion of two quarters of classroom study and after the completion of the most recent quarter of classroom study. …