Open Access. Powered by Scholars. Published by Universities.®
- Discipline
-
- Life Sciences (8509)
- Biology (2708)
- Physical Sciences and Mathematics (2395)
- Ecology and Evolutionary Biology (1584)
- Environmental Sciences (1473)
-
- Engineering (1339)
- Social and Behavioral Sciences (1147)
- Animal Sciences (1108)
- Plant Sciences (1029)
- Agriculture (736)
- Earth Sciences (606)
- Forest Sciences (567)
- Education (503)
- Civil and Environmental Engineering (493)
- Biomedical Engineering and Bioengineering (421)
- Psychology (386)
- Genetics and Genomics (380)
- Food Science (337)
- Entomology (323)
- Water Resource Management (309)
- Medicine and Health Sciences (291)
- Chemistry (281)
- Biological Engineering (263)
- Biochemistry, Biophysics, and Structural Biology (251)
- Nutrition (212)
- Sociology (202)
- Arts and Humanities (201)
- Biochemistry (176)
- Natural Resources and Conservation (151)
- Dairy Science (142)
- Keyword
-
- Utah State University (597)
- Utah (453)
- Newspaper (404)
- USU (398)
- The Utah Statesman (371)
-
- Statesman (367)
- Scanning electron microscopy (342)
- Agenda (264)
- Utah State University Extension (240)
- Educational Policies Committee (209)
- Human–wildlife conflicts (196)
- Faculty senate (192)
- Management (165)
- USU Extension (155)
- Minutes (146)
- Climate change (137)
- Curriculum Subcommittee (129)
- UWRL (116)
- Agriculture (114)
- Water (101)
- Transmission electron microscopy (96)
- X-ray microanalysis (96)
- Conservation (89)
- Ecology (80)
- Irrigation (80)
- Commencement (78)
- Environmental (77)
- Usu (77)
- Human-wildlife interactions (76)
- April (75)
- Publication Year
- Publication
-
- All Graduate Theses and Dissertations, Spring 1920 to Summer 2023 (3264)
- Scanning Microscopy (1289)
- Biology (697)
- Human–Wildlife Interactions (686)
- Wildlife Damage Management Conference (478)
-
- All Current Publications (464)
- The Utah Statesman (417)
- Wildland Resources Faculty Publications (416)
- Aspen Bibliography (408)
- All Graduate Theses and Dissertations, Fall 2023 to Present (340)
- Scanning Electron Microscopy (338)
- Educational Policies Committee (329)
- Memorandum (315)
- All Graduate Plan B and other Reports, Spring 1920 to Spring 2023 (303)
- Biology Faculty Publications (299)
- Undergraduate Honors Capstone Projects (293)
- Student Research Symposium (245)
- Reports (195)
- Biology Posters (190)
- Watershed Sciences Faculty Publications (186)
- Chemistry and Biochemistry Faculty Publications (172)
- Small Satellite Conference (171)
- All U.S. Government Documents (Utah Regional Depository) (165)
- Food Structure (161)
- Civil and Environmental Engineering Faculty Publications (158)
- Cells and Materials (148)
- Faculty Senate & Faculty Senate Executive Committee (145)
- Natural Resources and Environmental Issues (139)
- College of Engineering News (127)
- Utah Science (122)
- Publication Type
- File Type
Articles 14761 - 14790 of 16013
Full-Text Articles in Entire DC Network
Teaching Plans In Range Management For Utah High School Vocational Agricultural Programs, Jack A. Soper
Teaching Plans In Range Management For Utah High School Vocational Agricultural Programs, Jack A. Soper
All Graduate Plan B and other Reports, Spring 1920 to Spring 2023
Although several course of study outlines have been prepared to cover the subject of range management, the author has been unable to use them too effectively in teaching this important phase of vocational agriculture. Other teachers of vocational agriculture have expressed similar experiences and in group meetings have indicated a need for more teaching materials in range management and other important areas of agriculture.
Panguitch, Utah, where the author teaches, is located in Garfield County in the heart of a vast range area . There is a vital need for youth ar.d adults in the area to understand the important …
The Influence Of Trace Elements On Anemia, Yung-Fun Wang
The Influence Of Trace Elements On Anemia, Yung-Fun Wang
All Graduate Plan B and other Reports, Spring 1920 to Spring 2023
The fact that anemias constitute an important problem of public health has been realized only comparatively recently. When field surveys made in different countries before and after World War II had collected a great deal of information on dietary habits, food consumption levels, and nutritional status , it became more apparent that mild, moderate, and even severe anemic states existed in different communities. As was to be expected, anemia occurred more frequently in the malnourished people in the developing countries and the vulnerable groups of the population were the most affected (FAO/WHO Report, 1966).
Laboratory Studies Of Two Species Of Jackrabbit Bot Flies, Craig R. Baird
Laboratory Studies Of Two Species Of Jackrabbit Bot Flies, Craig R. Baird
Biology
The life history and host and site specificity of Cuterebra jellisoni Curran and Cuterebra ruficrus Austen were studied under laboratory conditions. Adult flies of each species were induced to mate. C. jellisoni eggs required seven to eight days for incubation, and C. ruficrus required nine to ten days. First instar larvae were successfully introduced into lagomorph hosts via all natural openings. Regardless of the introduction site, however, each species of larva was later found in a specific terminal site. C. jellisoni larvae completed development in jackrabbit hosts in 36 days and were found in subcutaneous cysts on the head. C. …
The Physiological Role Of The Pineal Body With Respect To Testicular Function In The House Sparrow (Passer Domesticus), Delon W. Barfuss
The Physiological Role Of The Pineal Body With Respect To Testicular Function In The House Sparrow (Passer Domesticus), Delon W. Barfuss
Biology
Pineal hydroxyindole-0-methyl transferase (HIOMT) activity of the House Sparrow was found to have an annual cycle. During seasons of reproductive activity, HIOMT activity was minimal in contrast to the increased HIOMT activity that occurred during the seasons of reproductive quiescence. The lag in response between increase in testes weight and change in pineal HIOMT activity and the fact that testes can increase in weight with an increase of pineal HIOMT activity suggests that the annual cycling of HIOMT activity and melatonin synthesis by the pineal gland is not responsible for the annual cycles in reproduction of the House Sparrow. However, …
Development Of Eimeria Ninakohlyakimovae From Sheep In Cell Cultures, Gary L. Kelley
Development Of Eimeria Ninakohlyakimovae From Sheep In Cell Cultures, Gary L. Kelley
Biology
Monolayer cell line cultures of ovine trachea, thyroid, thymus, and kidney cells, as well as an established cell line (Madin-Darby) of bovine kidney cells, were inoculated with sporozoites of Eimeria ninakohlyakimovae and observed for a maximum of 24 days. Sporozoites were observed penetrating cells within 5 minutes after inoculation, as well as 2 and 3 days after inoculation, and leaving cells 3 days after inoculation. Transformation from sporozoites to trophozoites occurred by a widening or by a lateral outpocketing of the sporozoite body. Trophozoites and schizonts were first seen 3 days after inoculation in all ovine cell types. Large numbers …
The Development Of Selected Vocalization Of The Hand-Reared Black-Capped Chickadees, Vivian Telford Anderson
The Development Of Selected Vocalization Of The Hand-Reared Black-Capped Chickadees, Vivian Telford Anderson
Biology
The development of selected vocalizations of hand-reared Black-Capped Chickadees (Parus atricapillus) was described and compared to the ontongeny of vocal signals of wild-reared juveniles. The adultlike vocalizations given by laboratory-reared juveniles, six weeks after hatching, were similar to the vocalizations of adults reared in the wild. The chickadee-dee, contact-flight, and the fright calls all appear to be derived from the begging call given by the nestlings. Songs may be derived from the chickadee-dee call precursor, however.
The Ontogeny Of Social Behavior Of Uinta Ground Squirrels, D. Andrew Saunders
The Ontogeny Of Social Behavior Of Uinta Ground Squirrels, D. Andrew Saunders
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
The social behavior of juvenile Uinta ground squirrels (Spermophilus armatus) was studied for 2 1/2 years in northeastern Utah. The purpose of the study was to describe the developing social behavior of unconfined, marked squirrels. Their behavior was recorded with motion pictures and written descriptions from the time they emerged from the natal burrow until they entered hibernation.
Three phases of behavioral development were apparent. The first phase began when the juveniles appeared above ground and ended 5 weeks later. This was a period of socialization and consisted of behavioral patterns best described as play. The second phase …
Nonparametric Test Of Fit, Frena Nawabi
Nonparametric Test Of Fit, Frena Nawabi
All Graduate Plan B and other Reports, Spring 1920 to Spring 2023
Most statistical methods require assumptions about the populations from which samples are taken. Usually these methods measure the parameters, such as variance, standard deviations, means, etc., of the respective populations. One example is the assumption that a given population can be approximated closely with a normal curve. Since these assumptions are not always valid, statisticians have developed several alternate techniques known as nonparametric tests. The models of such tests do not specify conditions about population parameters.
Certain assumptions, such as (1) observations are independent and (2) the variable being studied has underlying continuity, are associated with most nonparametric tests. However, …
A Study Of An Unintentional Shutdown (Scram) Problem In The Operation Of The High Flux Isotope Reactor, Cheng Ping Wu
A Study Of An Unintentional Shutdown (Scram) Problem In The Operation Of The High Flux Isotope Reactor, Cheng Ping Wu
All Graduate Plan B and other Reports, Spring 1920 to Spring 2023
The High Flux Isotope Reactor (HFIR) at the Oak Ridge National Laboratory experiences occasional operating difficulties caused by temporary low voltage conditions on its main power feeder line. The low voltage causes the shutdown of one or more of the three primary coolant pumps. When two of these pumps are shut down, the capacity of the cooling system is reduced to the point where the reactor is scrammed due to a high inlet coolant temperature.
This study was made to determine the cause of the high inlet temperature when operating with one primary coolant pump and to suggest possible changes …
Effects Of Sublethal, Cerebral X-Irradiation On Movement And Home-Range Patterns Of Black-Tailed Jackrabbits, Lewis Nelson Jr.
Effects Of Sublethal, Cerebral X-Irradiation On Movement And Home-Range Patterns Of Black-Tailed Jackrabbits, Lewis Nelson Jr.
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Effects of sublethal, cerebral irradiation on movement and home-range patterns of black-tailed jackrabbits were studied in Curlew Valley, Utah, using radio-telemetry. Irradiation of 70 captive animals indicated that the LD50(30) was between 5,556 and 6,200 roentgens.
Nine wild, free-living experimentals were trapped in desert terrain, irradiated, transmittered, and released at the capture sites. Seven wild controls were treated similarly but were not irradiated. The field-irradiation dosage was 5,000 roentgens.
Tracking accuracy was determined by telemetering transmitters at fixed locations. Mean hourly movement was measured within 20-30 percent error and home ranges were measured with an error of less than …
Areal And Temporal Variations In Developmental Phases Of Syringa Vulgaris L. Throughout The Western United States, Joseph Michael Caprio
Areal And Temporal Variations In Developmental Phases Of Syringa Vulgaris L. Throughout The Western United States, Joseph Michael Caprio
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
This paper presents the results of the analysis of 10 years of information 1957-1966 on three phases-- begin, peak and end bloom-- of the purple common lilac (Syringa vulgaris L.) using data recorded at approximately 1,000 locations throughout the Western Region of the United States.
The pattern of geographical advance of the various bloom phases is determined by both a manual mapping procedure developed by the author and by standard statistical methods. Manually drawn isophanes for the various elevations for begin bloom phase are based entirely upon the first 5 years of record, 1957-1961. A Zones of Adjustment map to …
Drift Of Oligophlebodes Sigma And Baetis Bicaudatus In A Mountain Stream, William Dean Pearson
Drift Of Oligophlebodes Sigma And Baetis Bicaudatus In A Mountain Stream, William Dean Pearson
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
The objective of this study was to clarify the relationships between drift rates, population density, production rates, key environmental factors, and movements of adults within two populations of stream insects (a caddisfly--Oligophlebodes sigma and a mayfly--Baetis bicaudatus).
Samples of benthic invertebrates (424 total) were collected every 28 days at four stations on Temple Fork of the Logan River, Utah, from October, 1967 to September, 1969. Samples of drift invertebrates (181 total) were collected every 14 days at three stations on Temple Fork during the same period. During summer months (June-September) a day and a night drift sample …
Effects Of Starvation And Time At Stocking On Survival Of Stocked Rainbow Trout, Salmo Gairdneri, Marlin John Bricker
Effects Of Starvation And Time At Stocking On Survival Of Stocked Rainbow Trout, Salmo Gairdneri, Marlin John Bricker
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Investigations of effects of starvation and time at stocking on the survival of catchable rainbow trout in two areas of Mammoth Creek in Dixie National Forest, Utah, were conducted from May 24 to December 6, 1969. Fish were starved for 6 days and 1 day and stocked in the morning (5:40-7:00 a.m.) and in the afternoon (1:45-5:30 p.m.). Out of 7,000 tagged fish stocked, 4,751 tags were returned by fishermen. The 6-day starved fish, stocked in the morning returned to the creel in highest numbers (1,240); followed by 1-day starved, afternoon-stocked fish (1,194); 6-day starved, afternoon-stocked fish (1,163); and 1-day …
Estimating The Rainfall-Runoff Characteristics Of Selected Small Utah Watersheds, Clive H. Walker
Estimating The Rainfall-Runoff Characteristics Of Selected Small Utah Watersheds, Clive H. Walker
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Runoff and rainfall data have been taken from three high mountain Utah watersheds and subjected to runoff to rainfall comparisons. The resulting Q/P ratios have been compared to the average volumes of runoff curve numbers (CN) computed from this data for each watershed. Runoff curve numbers were also estimated on the basis of the soils and vegetation data available for the watersheds.
An attempt has been made to estimate the watershed lag characteristics by computing synthetic hydrographs for successively larger values of time to peak estimates until the best fit comparison was achieved between the snythetic and the actual hydrographs. …
Levels Of Art Development Among Preschool Children, Sally Lynn Miner
Levels Of Art Development Among Preschool Children, Sally Lynn Miner
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
The problem which was investigated in this study was the influence of a child development laboratory experience and the child's discriminatory abilities on the developmental level of children's art productions.
Forty-eight children, three and four years of age, of whom 24 had no prior experience, and 24 others had completed approximately six months as participants in a child development laboratory, were included in the study.
All children were given a discrimination task to establish their individual levels of discriminatory abilities. Each child painted four pictures, two with easel paint and two with crayons. Each painting was analyzed to determine art …
The Teaching Of Concrete Thinking Strategies To Five-Year-Old Children And Its Effect On Performance On The Bender-Gestalt Test, Ronald C. Bennett
The Teaching Of Concrete Thinking Strategies To Five-Year-Old Children And Its Effect On Performance On The Bender-Gestalt Test, Ronald C. Bennett
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
This study was designed to examine the effect teaching five and one-half to six-year-old children analytical and conceptual thinking strategies would have on their subsequent performance on the Bender-Gestalt Test. The sample was composed of 34 kindergarten children in this age range from the Providence Elementary School. They were randomly divided into two groups of equal size; one group was then given three 10-minute training sessions over three days which were designed to teach them analytical and conceptual thinking strategies. The other group was also given three 10-minute sessions with the investigator; however, they were only involved in looking at …
An Economic Analysis Of Range Improvements On Saddle Creek Allotment And Curlew National Grasslands--With Special Consideration On The Effects Of Improvements On Wildlife Management, Jerry Russell Meyers
An Economic Analysis Of Range Improvements On Saddle Creek Allotment And Curlew National Grasslands--With Special Consideration On The Effects Of Improvements On Wildlife Management, Jerry Russell Meyers
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Range improvements for livestock were analyzed for the Curlew National Grassland and Saddle Creek Allotment. Increases in aum's which were a result of range improvements were calculated and valued at $4.00 each. Internal rates of return for both study areas were computed with a 15-year project life span for estimated grazing capacity and permitted grazing. Rate of return was then set at 10 percent to calculate project life span for both permitted grazing and estimated grazing capacity for the two areas.
Effects of range improvements for livestock on wildlife habitat were studied. Due to a lack of quantitative data, values …
Educational And Family Conditions That Affect Post-High School Plans Of Intermountain Navajo Seniors, George Patrick Lee
Educational And Family Conditions That Affect Post-High School Plans Of Intermountain Navajo Seniors, George Patrick Lee
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Graduation from high school has become the accepted educational goal for most Americans and stands as the minimum requirement not only for higher education but also competitive positions in the employment market. The general public, the government, business, industry and education have great interest in the plans and decisions of high school graduates.
Survey Of Interests Of The Aged As Related To Leisure Time With Special Emphasis On Educational Tv, Jessie M. Eller
Survey Of Interests Of The Aged As Related To Leisure Time With Special Emphasis On Educational Tv, Jessie M. Eller
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
This was a study of television interests of older citizens using respondents from two geographical areas--Cache County and Salt Lake City--using random sampling, rest home, and active senior citizens.
The purpose of this study was to assist in determining program preferences for a series of television shows beamed for the aged. This involved educational television and particularly KUSU Channel 12.
The top ten program preferences, in rank order, were:
News and Current Events
Music
Travelogues
Nature Study
Drama
Health and Medical Care
Sports and Recreation
Nutrition
Hobbies and Crafts
Security-Financial Management
There are very few programs beamed for the specific …
Racial Awareness Of Children In A Predominately White Area Compared To An Interracial Area, Janis S. Withrich
Racial Awareness Of Children In A Predominately White Area Compared To An Interracial Area, Janis S. Withrich
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
The effects of region and sex in relation to racial awareness were studied by comparing an interracial area to a predominately white area. The test ing of the hypotheses was carried out with two groups of preschool children comprised of 20 children from Utah State University in Logan , Utah, and 20 children from Children's World in Ogden, Utah.
The instrument used was one developed by J. Kenneth Morland, the Chairman of the Department of Sociology and Anthropology at Randolph- Macon Women's College in Lynchburg, Virginia. The instrument con isted of s ix 8-by-10 black and white pictures about which …
A Study Of Flooded And Rain Infiltration Relations With Surface Ponding, Yehia Z. El-Shafei
A Study Of Flooded And Rain Infiltration Relations With Surface Ponding, Yehia Z. El-Shafei
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
The non-linear partial differential equation (combination of Darcy's law and continuity equation) has been used in this investigation to predict the flooded infiltration through soils possessing appreciable amount of clay and initially drier than its field capacity. One of the most important assumptions made in solving the differential equation is that the capillary conductivity-moisture content relationship is unique for each initial moisture content computation due to the different reaction of clay minerals with different initial moisture contents.
Mathematical equations were also derived to predict:
- The rate of the wetting front advance, prior to the occurrence of surface ponding, taking into …
An Application Of Statistical Decision Theory To Farm Management In Sevier County, Utah, Suwaphot Lakawathana
An Application Of Statistical Decision Theory To Farm Management In Sevier County, Utah, Suwaphot Lakawathana
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
The major purpose of this study is to present selected empirical results of a study employing decision-making theory as a framework for considering decision making under risk. The particular problem involves choices between alternative crop rotations for Sevier County farmers. The study demonstrates the usefulness of the Bayesian theory that gives more than a point estimation.
A multiple regression model using two linear terms was employed to determine the influence of snow pack and reservoir storage on water availability for irrigation purposes during July, August, and September.
The Bayesian approach was employed. The optimal action or decision was first determined …
Factors Influencing The Performance Of Bromoxynil 4(2,4-Db), Or A Companion Crop For Weed Control In Seedling Alfalfa, Ferrin D. Leavitt
Factors Influencing The Performance Of Bromoxynil 4(2,4-Db), Or A Companion Crop For Weed Control In Seedling Alfalfa, Ferrin D. Leavitt
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Some of the factors influencing the performance of bromoxynil, 4(2,4-DB), or a companion crop for weed control in seedling alfalfa were studied in the greenhouse and at field locations in Farmington and Logan, Utah. The effect of application rate, stage of growth, temperature, and soil moisture on the phytotoxicity of bromoxynil and 4(2,4-DB) to alfalfa and weeds were studied.
Alfalfa yields were increased by 4(2,4-DB) at all rates and stages of application. All rates and stages of bromoxynil treatment except the one-fourth pound per acre three to four trifoliate application resulted in alfalfa yields below that of the control.
The …
The Secondary School Principal's Role In Professional Negotiations As Perceived By Representatives Of Utah's Educational Enterprise, Paul H. Lefevor
The Secondary School Principal's Role In Professional Negotiations As Perceived By Representatives Of Utah's Educational Enterprise, Paul H. Lefevor
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
The objective of this study was to examine the extent to which congruent role expectations on 50 selected variables were held for the secondary school principal about his role in professional administration and in collective negotiations by representatives of Utah's educational enterprise. The selected variables describe certain possible functions performed by the principal and were subgrouped into nine topic headings that were tested by use of the null hypothesis method. The nine topic variables were: (A) Instruction and Curriculum Development, (B) Personnel Staffing and Placement , (C) Pupil Arrangement and Control, (D) Public Relations, (E) School Building Management and Finance, …
The Annual Demography Of A Population Of Antelope Ground Squirrels In Curlew Valley, Utah, James R. Kitts
The Annual Demography Of A Population Of Antelope Ground Squirrels In Curlew Valley, Utah, James R. Kitts
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
The annual demography of a population of antelope ground squirrels in Curlew Valley, Utah was studied by measuring population density, natality, and mortality. Capture- recapture techniques yielded lower estimates than the Hayne strip- census. The estimates suggested 1968 was a year of population decline.
One hundred seventy- three squirrels were collected and autopsied to obtain sex ratio, age structure, natality, and mortality data. The seasonal sex ratios for adult and yearling squirrels showed 82 percent females in spring 1968, this gradually changed to 56 percent by winter. The seasonal sex ratios of the young squirrels showed 59 percent females upon …
Seed Response Under Snow On A Subalpine Range In Central Utah, Alvin T. Bleak
Seed Response Under Snow On A Subalpine Range In Central Utah, Alvin T. Bleak
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
The response of grass, forb, and shrub seeds to the subalpine environment during the fall and under winter snow and under laboratory conditions at 20/28 C was observed for 3 consecutive years at an elevation of about 3000m on the Wasatch Plateau in central Utah.
Seeds in nylon sleeves were planted under 2 cm of soil before snowfall. Under snow plantings were made directly on the soil surface and under 2 cm of soil. The seeds planted before snowfall were removed each year on four occasions: when under snow plantings were made, after snow depth exceeded 130 cm (deep snow), …
Seasonal Utilization Of Sago Pondweed By Waterfowl At Bear River Migratory Bird Refuge, Utah, Michael R. Sterling
Seasonal Utilization Of Sago Pondweed By Waterfowl At Bear River Migratory Bird Refuge, Utah, Michael R. Sterling
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Seasonal utilization of sago pondweed (Potamogeton pectinatus L.) by waterfowl was studied at Bear River Miqratory Bird Refuge by comparing amounts of sago production on a series of plots on Unit Four. One plot was available to carp and waterfowl; one only to carp; and one available to neither.
The cage used to eliminate carp and waterfowl use of a plot caused a significant increase in sago production. The increase was attributed to less turbidity and less wind and wave action within the cage.
Carp distribution was limited to deep-water portions of Unit Four, a small area, and …
A Study Of Root Biomass In An Engeimann Spruce-Subalpine Fir Stand In Northern Utah, Larry O. Gadt
A Study Of Root Biomass In An Engeimann Spruce-Subalpine Fir Stand In Northern Utah, Larry O. Gadt
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Biomass of roots in the top 6 inches of soil profile was measured . This weight was then used in a stepwise multiple regression to test correlations between root biomass and above ground merisurational parameters.
Total biomass of all roots was 9822 ± 2810 pounds per acre oven dry. Spruce roots weighed 4417 ± 997 pounds per acre; of this spruce roots less than 0.125 inch diameter weighed 2023 ± 347 pounds per acre and biomass of spruce roots greater than 0.125 inch diameter was 2394 ± 8S3 pounds per acre. Total fir roots weighed Sl56 ± 2687 pounds per …
A Study Of Insects Attacking Pinus Flexilis James Cones In Cache National Forest, Thomas Evan Nebeker
A Study Of Insects Attacking Pinus Flexilis James Cones In Cache National Forest, Thomas Evan Nebeker
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Six species of insects were found attacking limber pine cones from July 26, 1968, through October 4, 1969, in Cache National Forest. The three species considered of major importance are: Conophthorus flexilis Hopkins, Dioryctria abietella (D. & S.), and D. sp. near or disclusa Heinrich. The three minor species encountered are; Bradysia sp., Trogoderma parabile Beal, and Asynapta keeni (Foote). In addition to the major and minor cone pests three parasites, Apanteles sp. prob. starki Mason, Elacherus sp., and Hypopteromalus percussor Girault were found associated with the cone pests.
C. flexilis, which completely destroys the cone, was ranked as …
The Effects Of Cholinergic And Adrenergic Chemicals On Drinking Behavior (Thirst), G. Ron Norton
The Effects Of Cholinergic And Adrenergic Chemicals On Drinking Behavior (Thirst), G. Ron Norton
All Graduate Theses and Dissertations, Spring 1920 to Summer 2023
Because of inconsistencies in the research literature following Grossman's (1960) demonstration that drinking behavior (thirst) could be modulated by intrahypothalamic injections of adrenergic and cholinergic chemicals, a series of studies were undertaken to clarify the relation between introducing chemicals into the brain and drinking behaviors.
The first study attempted to determine the effect of water deprivation on post-deprivation drink sequencing. It has been demonstrated that 75% - 90% of the water consumed by normal rats is taken during the evening hours (Fitzsimmons, 1957; Stellar & Hill, 1952). Grossman's (1960; 1962a) studies failed to consider normal drinking rhythms and consequently modulated …