Open Access. Powered by Scholars. Published by Universities.®

Life Sciences Commons™

Open Access. Powered by Scholars. Published by Universities.®

Utah State University

Series

2012

Discipline
Keyword
Publication
File Type

Articles 1 - 30 of 148

Full-Text Articles in Life Sciences

The Effect Of Temperature On Seed Quality And Quantity In Crosses Between European (Populus Tremula) And Hybrid Aspens (P. Tremula X P. Tremuloides), L. Koviuranta, T. Latva-Karjanmaa, P. Pulkkinen Dec 2012

The Effect Of Temperature On Seed Quality And Quantity In Crosses Between European (Populus Tremula) And Hybrid Aspens (P. Tremula X P. Tremuloides), L. Koviuranta, T. Latva-Karjanmaa, P. Pulkkinen

Aspen Bibliography

Hybrid aspen (Populus tremula L. Populus tremuloides Michx.) plantations are expanding in Fennoscandia and the Baltic countries; however, the possible effects of plantations on the native European aspen (P. tremula) and the level of gene flow between European and hybrid aspen have not been investigated. We studied seed quantity and quality in intraspecific and interspecific crosses of the European and hybrid aspens over a two year period. In order to study whether elevated temperatures due to climate change would benefit the species differently, we performed the crosses in different temperatures. In both years, interspecific crosses produced more seeds with higher …

Go to article

Product Pig Production Planner, Scott Williams, Darrell Rothlisberger Dec 2012

Product Pig Production Planner, Scott Williams, Darrell Rothlisberger

Archived Agriculture Publications

There are many factors to consider when selecting a market hog for your 4-H project animal. Seek out reputable hog producers who produce hogs with high quality genetics and growth potential. Discuss the health and feeding program the hogs have received and follow these recommendations to assure your project animal can reach its growth potential.

Go to article

Daily Water Consumption Of Turkeys Raised In Utah, David Frame Dec 2012

Daily Water Consumption Of Turkeys Raised In Utah, David Frame

All Current Publications

This publication explains why knowing the daily water consumption of poultry is so important whenit comes to administering medication and vaccines safely and effectively.

Go to article

Effects Of Slash Pile Burning After Restoring Conifer- Encroached Aspen, Christa M. Dagley, John-Pascal Berrill, Stephanie Coppeto, Kyle Jacobson Dec 2012

Effects Of Slash Pile Burning After Restoring Conifer- Encroached Aspen, Christa M. Dagley, John-Pascal Berrill, Stephanie Coppeto, Kyle Jacobson

Aspen Bibliography

Removal of conifers encroaching aspen stands has been advocated and is being practiced in the Lake Tahoe Basin (EIP Project #10080: Aspen Community Restoration Projects). In remote and roadless areas, thinning of conifers is generating large volumes of wood and pile burning is currently being implemented to handle this biomass on site. However, the effects of pile burning on aspen are unknown, and there is an urgent need for guidelines to support design of thinning treatment prescriptions; specifically burn pile size and safe distances from live aspen trees of any size to prevent injury.

Go to article

Meat-Wise Eating Habits, Jenna Haycock, Kelly Anderson, Roslynn Brain Dec 2012

Meat-Wise Eating Habits, Jenna Haycock, Kelly Anderson, Roslynn Brain

All Current Publications

No abstract provided.

Go to article

Multi-Stage Novice Defensive Driver Training Program: Does It Create Overconfidence?, Jessica Mueller, Laura Stanley, Kezia R. Manlove Nov 2012

Multi-Stage Novice Defensive Driver Training Program: Does It Create Overconfidence?, Jessica Mueller, Laura Stanley, Kezia R. Manlove

Wildland Resources Faculty Publications

Multi-stage training programs have been recommended to transfer knowledge and skills to high-risk novice drivers. However, some have suggested there is a link between skill training and an increased crash probability due to overconfidence. This project evaluates the outcomes of a multi-phase training system and compares the performance of novice drivers who received second-stage training with that of a control group of novice drivers who received traditional, single-stage training. This trained group and an equivalent group of untrained novice drivers completed annual surveys describing their involvement with traffic citations, near-miss crashes, single-vehicle crashes, and multiple-vehicle crashes. Citation records from the …

Go to article

Intrinsic Motivation, Vitality, And High Altitude Climbing: An Analysis Of Seven Case Studies, J. C. Norling, Mark F. Roark, Dale R. Wagner, A. Montour Nov 2012

Intrinsic Motivation, Vitality, And High Altitude Climbing: An Analysis Of Seven Case Studies, J. C. Norling, Mark F. Roark, Dale R. Wagner, A. Montour

Kinesiology and Health Science Faculty Publications

College adventure leadership programs may involve training students through multi-day expeditions to remote locations to test their physical and psychological performance. In the context of a group-oriented, mountaineering course in a high altitude environment participant's performance level might be a function of motivation level, vitality level, and/or may be influenced by physiological changes occurring during the ascent. The theoretical framework selected for the study was Cognitive Evaluation Theory (CET) (Deci & Ryan, 1985b), a sub-theory of Selfdetermination Theory (SDT) (Deci & Ryan, 1985a). CET suggests that an intrinsically motivated activity, if internalized, could be a representation of a participant's inclination …

Go to article

Marketing Strategies For Organic And Natural Meat Producers, Kynda Curtis, Shane Feuz, Nelissa Aybar Nov 2012

Marketing Strategies For Organic And Natural Meat Producers, Kynda Curtis, Shane Feuz, Nelissa Aybar

All Current Publications

In-person consumer surveys concerning meat consumption preferences and willingness to pay for specialty meat products were carried out in the fall of 2007 (Wang, Curtis, and Moeltner, 2011).

Go to article

Streptomycin Resistance Of Erwinia Amylovora, Causal Agent Of Fire Blight, Claudia Nischwitz Nov 2012

Streptomycin Resistance Of Erwinia Amylovora, Causal Agent Of Fire Blight, Claudia Nischwitz

All Current Publications

No abstract provided.

Go to article

Herbicide Strategies To Maximize Yield In Glyphosate-Resistant Corn, Earl Creech, Clark Israelsen, Mike Pace, Ralph Whitesides Nov 2012

Herbicide Strategies To Maximize Yield In Glyphosate-Resistant Corn, Earl Creech, Clark Israelsen, Mike Pace, Ralph Whitesides

All Current Publications

Water, nutrients, space, and sunlight are critical resources for the growth and development of all crops. Over the years, recommendations for inputs such as fertilizer, irrigation, and seeding rate have been fine-tuned to maximize yields while minimizing cost. Weeds compete with crops for this limited pool of resources. As resource availability shrinks, crop yields almost immediately begin to decline

Go to article

Optimizing Land Use On A Beef Operation: A Utah Example, Nicole Nelson, Mark Nelson, D. R. Zobell Nov 2012

Optimizing Land Use On A Beef Operation: A Utah Example, Nicole Nelson, Mark Nelson, D. R. Zobell

All Current Publications

One of the most important resources that a beef producer has is the pasture or range. This resource must be provided great care in order to continue producing beef cattle.

Go to article

Influence Of Aboveground Vegetation On Seed Bank Composition And Distribution In A Great Basin Desert Sagebrush Community, Kristen M. Pekas, Eugene W. Schupp Oct 2012

Influence Of Aboveground Vegetation On Seed Bank Composition And Distribution In A Great Basin Desert Sagebrush Community, Kristen M. Pekas, Eugene W. Schupp

Articles

The quantity, composition, and spatial dispersion of seed banks can greatly affect community dynamics. While seed banks of hot deserts have been studied extensively, little is known about seed banks in cold deserts, in particular the relationship between the seed bank and the aboveground vegetation. We investigated the relationship between the seed bank and aboveground vegetation and the effect of microhabitat (shrub interspace or beneath shrub) and aboveground community phase (high or low perennial bunchgrass cover) on the seed bank of a Great Basin Desert sagebrush community. The seed bank and aboveground vegetation differed in their most dominant species, resulting …

Go to article

Teff Hay Production Guidelines For Utah, Earl Creech, Mike Laca, James Barnhill, Shawn Olsen Oct 2012

Teff Hay Production Guidelines For Utah, Earl Creech, Mike Laca, James Barnhill, Shawn Olsen

All Current Publications

Teff (sometimes spelled tef) [Eragrostis tef (Zucc.) Trotter] is a relatively new forage crop to Utah that has grown in popularity in recent years. It is an annual, warm-season grass that is native to Ethiopia.

Go to article

Blue Orchard Bee, Cory Stanley Oct 2012

Blue Orchard Bee, Cory Stanley

All Current Publications

This publication contains a description,the life cycle, and tips for management of blue orchard bees in Utah.

Go to article

Millard County Crop Production Costs And Returns, 2012, Trenton Wilde, Kynda Curtis, Chris Lewis Oct 2012

Millard County Crop Production Costs And Returns, 2012, Trenton Wilde, Kynda Curtis, Chris Lewis

All Current Publications

Sample costs and returns to establish and produce alfalfa hay, barley, and corn under flood irrigation and wheat under wheel line irrigation in Millard County, Utah, are presented in this publication.

Go to article

Growth And Physiological Responses Of Maize And Sorghum Genotypes To Salt Stress, Youping Sun, Wenwei Xu, Denise Rodriguez, Youping Sun Sep 2012

Growth And Physiological Responses Of Maize And Sorghum Genotypes To Salt Stress, Youping Sun, Wenwei Xu, Denise Rodriguez, Youping Sun

Plants, Soils, and Climate Faculty Publications

The growth and physiological responses of four maize inbred lines (CUBA1, B73, B5C2, and BR1) and four sorghum hybrids (SS304, NK7829, Sordan 79, and KS585) to salinity were determined. Fifteen days after sowing, seedlings were irrigated with nutrient solution (control) at electrical conductivity (EC) of 1.5 dS m−1 or saline solution at EC of 8.0 dS m−1 (salt treatment) for 40 days. Dry weight of shoots in maize was reduced by 58%, 65%, 62%, and 69% in CUBA1, B73, B5C2, and BR1, respectively, while that of sorghum was reduced by 51%, 56%, 56%, and 76% in SS304, NK7829, Sordan79, and …

Go to article

Fortification Of Cheese With Vitamin D3 Using Dairy Protein Emulsions As Delivery Systems, M. Tippetts, Silvana Martini, C. Brothersen, D. J. Mcmahon Sep 2012

Fortification Of Cheese With Vitamin D3 Using Dairy Protein Emulsions As Delivery Systems, M. Tippetts, Silvana Martini, C. Brothersen, D. J. Mcmahon

Nutrition, Dietetics, and Food Sciences Faculty Publications

Vitamin D is an essential vitamin that is synthesized when the body is exposed to sunlight or after the consumption of fortified foods and supplements. The purpose of this research was to increase the retention of vitamin D3 in Cheddar cheese by incorporating it as part of an oil-in-water emulsion using a milk protein emulsifier to obtain a fortification level of 280 IU/serving. Four oil-in-water vitamin D emulsions were made using sodium caseinate, calcium caseinate, nonfat dry milk (NDM), or whey protein. These emulsions were used to fortify milk, and the retention of vitamin D3 in cheese curd in a …

Go to article

Camper Outcomes Increase Regardless Of Session Length: Beyond Anecdotal Evidence Of Increased Competence, Independence And Friendship Skills, Mark F. Roark Sep 2012

Camper Outcomes Increase Regardless Of Session Length: Beyond Anecdotal Evidence Of Increased Competence, Independence And Friendship Skills, Mark F. Roark

Kinesiology and Health Science Faculty Publications

Session length may not be as vital to the accomplishment of developmental outcomes as directors are anecdotally sharing. Interestingly, no empirical support exists for the conventional wisdom that longer sessions have better outcomes than shorter sessions for campers. Dimock and Hendry (1929) found that campers’ level of development in general did not significantly vary whether they were at camp one or two months. They cautioned that this finding might not appropriately represent the actual effect of camp due to limitations in the measurement tool. Comparably, ACA’s Directions (2005) reported that session length was not a reliable predictor of camper developmental …

Go to article

Developing An Online Certification Program For Nutrition Education Assistants, D. Christofferson, N. Christensen, Heidi Leblanc, M. Bunch Sep 2012

Developing An Online Certification Program For Nutrition Education Assistants, D. Christofferson, N. Christensen, Heidi Leblanc, M. Bunch

Nutrition, Dietetics, and Food Sciences Faculty Publications

Objective: To develop an online certification program for nutrition education paraprofessionals to increase knowledge and confidence and to overcome training barriers of programming time and travel expenses. Design: An online interactive certification course based on Supplemental Nutrition Assistance Program-Education and Expanded Food and Nutrition Education Program core competencies was delivered to employees of both programs. Traditional vs online training was compared. Course content validity was determined through expert review by registered dietitians. Parameters studied included increase of nutrition knowledge and teaching technique/ability, educator satisfaction, and programming costs related to training. Setting: Utah State University Extension. Participants: Twenty-two Supplemental Nutrition Assistance …

Go to article

West Nile Virus In Utah, Erin Hodgson Sep 2012

West Nile Virus In Utah, Erin Hodgson

All Current Publications

West Nile Virus (WNV) was first detected in Uganda in 1937. For several years, WNV remained relatively contained in Africa, Europe and the Middle East.

Go to article

The Local Food Movement: Definitions, Benefits & Resources, Roslynn Brain Sep 2012

The Local Food Movement: Definitions, Benefits & Resources, Roslynn Brain

All Current Publications

No abstract provided.

Go to article

Preserving Quality Silage At The Bunker, Clark Israelsen, Allen Young, Dillon Feuz, Lyle Holmgren Sep 2012

Preserving Quality Silage At The Bunker, Clark Israelsen, Allen Young, Dillon Feuz, Lyle Holmgren

All Current Publications

Corn silage is a high value commodity and is becoming increasingly important in livestock and dairy diets. Over time, growers have made impressive progress in producing remarkable yields in the field along with increasing efficiency.

Go to article

Lawn Fertilizers For Cool Season Turf, Taun Beddes, Kelly Kopp Sep 2012

Lawn Fertilizers For Cool Season Turf, Taun Beddes, Kelly Kopp

All Current Publications

Lawns provide a durable and functional surface for many outdoor activities while adding beauty to the landscape. For these reasons, a healthy, green lawn is the goal of many homeowners and landscape managers. Keeping a lawn healthy and green may require many management practices such as mowing, irrigation and aerification. Often, these practices will include fertilizing with supplemental nutrients at various times during the growing season. This promotes optimum turf color, improves re-growth, and increases tolerance to wear, drought, insects and disease. The broad number of fertilizer options available from retailers can make choosing a fertilizer difficult. However, choosing an …

Go to article

Measurement Of The Respiratory Quotient Of Peat, Jake Nelson Aug 2012

Measurement Of The Respiratory Quotient Of Peat, Jake Nelson

Hydroponics/Soilless Media

Respiratory quotient (RQ) is the ratio of CO2 produced to O2 consumed by an organism. Complete respiration of glucose will give an RQ of 1 as described by the formula CnH2nOn+nO2→nCO2+nH2O. The respiration of molecules with lower oxygen content, such as lipids, give RQ values of less than one, whereas in cases of anaerobic metabolism, an increase in biomass or the respiration of substances such as humic, oxalic and citric acids the respiratory quotient can be greater than one. In complex systems such as soil, Dilly …

Go to article

A Comparison Of Methods For Measuring Co2 And O2, Jake Nelson Aug 2012

A Comparison Of Methods For Measuring Co2 And O2, Jake Nelson

Techniques and Instruments

Understanding the dynamics of respiratory gasses gives critical insight into the metabolic processes of a biological system. An efficient and effective means of measuring respiration is essential to understanding aspects of the biosphere. Many methods have been developed for measuring changes in CO2 and O2, both as integrated systems and as individual components. Many experiments use an alkali trap with subsequent titration as an inexpensive method for CO2 measurement. Haney et al. (2008) compared the titration method against infrared gas analysis (IRGA) and found them to be highly correlated, with r2=0.95. The use of …

Go to article

Geographical Distribution And Survival Of Iris Yellow Spot Virus In Spiny Sowthistle, Sonchus Asper, In Georgia, Claudia Nischwitz Aug 2012

Geographical Distribution And Survival Of Iris Yellow Spot Virus In Spiny Sowthistle, Sonchus Asper, In Georgia, Claudia Nischwitz

All Current Publications

No abstract provided.

Go to article

Demography, Vital Rates, Habitat-Use, And Seasonal Movements Of Greater Sage-Grouse 2012 Annual Report, Avery Cook, Brain Wing, Todd Black, Terry A. Messmer Aug 2012

Demography, Vital Rates, Habitat-Use, And Seasonal Movements Of Greater Sage-Grouse 2012 Annual Report, Avery Cook, Brain Wing, Todd Black, Terry A. Messmer

All Current Publications

No abstract provided.

Go to article

Rancher Adoption Potential Of The Birdsfoot Trefoil Pasture Beef Production System In The Intermountain West, Kynda Curtis, Zhao Ma, Jennifer Macadam, Voravee Chakreeyarat Aug 2012

Rancher Adoption Potential Of The Birdsfoot Trefoil Pasture Beef Production System In The Intermountain West, Kynda Curtis, Zhao Ma, Jennifer Macadam, Voravee Chakreeyarat

All Current Publications

Beef cattle raised in the western United States spend the majority of their life on rangeland or pasture, eating grasses and forbs, followed by three to four months in a feedlot eating a combination of grain and hay to reach target weight (Norwak 1991).

Go to article

Concentrated Flow Erodibility For Physically Based Erosion Models: Temporal Variability In Disturbed And Undisturbed Rangelands, Osama Z. Al-Hamdan, Frederick B. Pierson, Mark A. Nearing, C. Jason Williams, Jeffry J. Stone, Patrick R. Kormos, Jan Boll, Mark A. Weltz Jul 2012

Concentrated Flow Erodibility For Physically Based Erosion Models: Temporal Variability In Disturbed And Undisturbed Rangelands, Osama Z. Al-Hamdan, Frederick B. Pierson, Mark A. Nearing, C. Jason Williams, Jeffry J. Stone, Patrick R. Kormos, Jan Boll, Mark A. Weltz

Articles

Current physically based overland flow erosion models for rangeland application do not separate disturbed and undisturbed conditions in modeling concentrated flow erosion. In this study, concentrated flow simulations on disturbed and undisturbed rangelands were used to estimate the erodibility and to evaluate the performance of linear and power law equations that describe the relationship between erosion rate and several hydraulic parameters. None of the hydraulic parameters consistently predicted the detachment capacity well for all sites, however, stream power performed better than most of other hydraulic parameters. Using power law functions did not improve the detachment relation with respect to that …

Go to article

Arbor Text, Larry A. Sagers Jul 2012

Arbor Text, Larry A. Sagers

All Archived Publications

No abstract provided.

Go to article

Next Last