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Full-Text Articles in Life Sciences

Assessing Net Returns To Blueberry Production Using A Decision Support Tool, Sokha Sok Dec 2014

Assessing Net Returns To Blueberry Production Using A Decision Support Tool, Sokha Sok

Theses and Dissertations

The purpose of this study was to develop and assess the profitability of four highbush blueberry farming systems in the south: organic field production, conventional field production, organic high tunnel production and conventional high tunnel production. Four baseline budget scenarios, one for each system, are developed for a 15 year production period. The results suggest that under expected production and price conditions for Northwest Arkansas, while all four production systems generated positive present value of net returns, the conventional field production produced the highest present value of net returns across the 15 years. The breakeven years of production were 7 ...


The Economic Viability Of Cocoa Crop Insurance In Ghana, Justin D. Mckinley Dec 2014

The Economic Viability Of Cocoa Crop Insurance In Ghana, Justin D. Mckinley

Theses and Dissertations

This study was motivated by the fact that Ghanaian cocoa producers face lower yields than other main cocoa producing counties which in turn increases food insecurity for smallholder producers. In addition, low yields experienced by Ghanaian producers is a driving factor for forest degradation and deforestation as cocoa producers encroach further into previously undisturbed forests in efforts to increase their incomes. There are currently production methods to achieve higher yields readily available in Ghana; however, many producers choose not to adopt these methods because they are seen as too risky, or simply cannot adopt them due to financial/credit constraints ...


European Consumers' Attitudes Towards Cisgenic Rice, Anne-Cécile Delwaide Dec 2014

European Consumers' Attitudes Towards Cisgenic Rice, Anne-Cécile Delwaide

Theses and Dissertations

The enhancement of existing plant breeding techniques, such as cisgenesis, allows plant breeders to enhance an existing cultivar quicker and with little to no genetic drag. Cisgenesis is the genetic modification of a recipient plant with natural gene(s) from a sexually compatible plant. Unlike transgenesis, which is the genetic modification of a recipient plant with gene(s) from any non‐plant organism, or from a donor plant that is sexually incompatible with the recipient plant, the results of cisgenesis could occur naturally over time. Currently, both cisgenic and transgenic products are classified as genetically modified organisms (GMOs) and are ...


Price Discovery And Futures Spreads For U.S. And Chinese Rice Futures Market, Wei Yang Dec 2014

Price Discovery And Futures Spreads For U.S. And Chinese Rice Futures Market, Wei Yang

Theses and Dissertations

Rice, the primary staple food for more than half the world's population, is the second world's most consumed food grain. In recent years, world rice price has increased and become more volatile especially in the period 2007-2010. Rice price volatility has a huge impact on Asian countries, especially countries in Southeast Asia where rice is a staple food for millions of households. Private market tools to manage price risk and discover price such as futures markets have been analyzed and assessed as possible solutions to coping with rice price volatility issue. Two primary functions of agricultural commodities futures ...


Population Genetics, Distributions And Phenology Of Bombus Latreille, 1802 And Xylocopa Latreille, 1802 (Hymenoptera: Apidae), Amber Dawn Tripodi Dec 2014

Population Genetics, Distributions And Phenology Of Bombus Latreille, 1802 And Xylocopa Latreille, 1802 (Hymenoptera: Apidae), Amber Dawn Tripodi

Theses and Dissertations

This work addresses multiple knowledge gaps in bee ecology, population health and phylogeography in order to provide insights into the changing distributions of native bees. A comparison of Arkansas bumble bee records mirrors range-wide surveys, with records of stable species (Bombus bimaculatus Cresson, 1863 and B. impatiens Cresson, 1863) increasing three-fold, and records of the declining B. pensylvanicus (DeGeer, 1773) dropping to 60% of historical levels. However, nationally-recommended conservation-genetics tools did not mirror these results on a regional level. Stable and declining species had equivalent genetic diversity in samples from Arkansas and Tennessee (HS range: 0.46-0.63). Diploid ...


Consumer Acceptance And Willingness To Pay For Genetically Modified Rice In China: A Double Bounded Dichotomous Choic Contingent Valuation Survey Calibrated By Cheap Talk, Jing Jin Dec 2014

Consumer Acceptance And Willingness To Pay For Genetically Modified Rice In China: A Double Bounded Dichotomous Choic Contingent Valuation Survey Calibrated By Cheap Talk, Jing Jin

Theses and Dissertations

Considering population growth, limitations on land and water resources, and contamination to the ecosystem due to agricultural activities, current rice production in China is facing pressure to fulfill national demand. Self-sufficiency of rice has been a long-held political objective of the Chinese government and it is national goal to maintain the equilibrium between the national production and consumption or even achieve a supply surplus in rice. With the developing bio-technology of genetic modification (GM), scientists believe that using genetically modified cultivars may ease the pressure mentioned above. However, both the government and the people are very cautious about large-scale cultivation ...


Effect Of Food Aid Delivery Mode On Food Production In Recipient Nation, Steven Marc Wolf Oct 2014

Effect Of Food Aid Delivery Mode On Food Production In Recipient Nation, Steven Marc Wolf

Theses and Dissertations

The purpose of this study was to provide quantitative evidence linking food aid delivery mode and its correlation with food production in the recipient nation. Debate over the best way to provide food aid to developing countries inspired this study. The three delivery modes used for this study were direct transfer, locally purchase, and triangular purchase. Food aid data was available from The World Food Programme and food production indices were available from The World Bank. Correlations between the independent variable (food aid quantity by delivery mode) and dependent variable (food production index) were examined using the coefficient of determination ...


Identification And Development Of The Support Needs In Nematology For Arkansas Cooperative Extension Personnel, Mia Gentry Aug 2014

Identification And Development Of The Support Needs In Nematology For Arkansas Cooperative Extension Personnel, Mia Gentry

Theses and Dissertations

County extension agents are vital to the land-grant university system and are responsible for transferring current, research-based knowledge from the university to the community. In-service training allows agents the means to maintain a current, sound knowledge base. Needs identified by leading nematologists led the researcher of this study to assess if nematology education was a topic that warranted in-service training development for Arkansas Cooperative Extension Service (CES) agents. The researcher also assessed agents' comfort level with job related technology. Of the respondents, 67% identified general knowledge of plant parasitic nematodes necessary to meet the needs of their clientele. Findings from ...


A Mixed Methods Approach Of Communication Campaign Development And Assessment: Identifying The Needs Of An Audience And Determining The Value In Evaluation, Tara Johnson Aug 2014

A Mixed Methods Approach Of Communication Campaign Development And Assessment: Identifying The Needs Of An Audience And Determining The Value In Evaluation, Tara Johnson

Theses and Dissertations

The two articles presented in this thesis used both quantitative and qualitative research methods to examine two distinct stages of communication campaigns: research and evaluation. In the quantitative study, students (n = 440) at the University of Arkansas were surveyed to determine their perceptions of the Arkansas Water Resources Center (AWRC), water resources, and water issues. A questionnaire was developed from an existing instrument, reviewed by a panel of experts, pilot tested, and revised. The researchers found participants were most aware (M = 3.23, SD = 1.14), concerned (M = 4.07, SD = 0.86), and interested (M = 4.10, SD = 0 ...


Characteristics Of Agricultural Communications Undergraduate Programs, Morgan Michelle Large Aug 2014

Characteristics Of Agricultural Communications Undergraduate Programs, Morgan Michelle Large

Theses and Dissertations

This study was designed to characterize agricultural communications undergraduate programs nationwide. A total of 41 undergraduate agricultural communications programs were identified via the National ACT database, Internet searches, and previous academic program research. Objectives included creating an accounting of existing programs, a description of those programs, identifying trends in program demographics, curriculum development and identifying top programs. This study employed a census approach and used a mixed methods design. A mixed-methods survey instrument was used to collect the data. The survey included questions to gain both qualitative and quantitative data to meet this study's objectives. The quantitative data were ...


Assessing Food Policy Options In Asia To Reduce Price Volatility Of Rice Market, Ranjitsinh Mane Aug 2014

Assessing Food Policy Options In Asia To Reduce Price Volatility Of Rice Market, Ranjitsinh Mane

Theses and Dissertations

Rice is a staple food in Asia and its prices at national and international levels are largely influenced by different policy actions of trading countries. The consequence of the 2008 food crisis was food riots and rationing of rice in many nations. The ASEAN Plus Three (APT) countries have adopted an institutional framework called ASEAN Plus Three Emergency Rice Reserves (APTERR) to address food security concerns of ASEAN countries that may arise due to climate change, supply chain disruptions or price speculation in the regional rice market. The RICEFLOW model is used to study the effectiveness of the strategic grain ...


Millennial Alumni Perceptions Of Communications Media Utilized By The Dale Bumpers College Of Agricultural, Food And Life Sciences, Amanda Nicole Anthony Aug 2014

Millennial Alumni Perceptions Of Communications Media Utilized By The Dale Bumpers College Of Agricultural, Food And Life Sciences, Amanda Nicole Anthony

Theses and Dissertations

Alumni relationship cultivation serves as the foundation of higher education and must be maintained to keep graduates and alma maters connected. To evaluate the success of communications media in reaching recent graduates, classified as Millennials, this study sought to determine Millennial alumni perceptions of media distributed by the Dale Bumpers College of Agricultural, Food and Life Sciences (Bumpers College) from 2012 through 2014. Assessed communications media included The Graduate and AR Culture magazines, The Graduate e-newsletter, tailgate and mocktail party invitations, College website, and social media presences. Active and inactive Millennial alumni (N = 20) responses were gathered through telephone interviews ...


Knowledge, Perceptions, And Outcomes Of Agricultural Communications Curriculum In Arkansas Secondary Agricultural Classrooms, Carley Payne Calico May 2014

Knowledge, Perceptions, And Outcomes Of Agricultural Communications Curriculum In Arkansas Secondary Agricultural Classrooms, Carley Payne Calico

Theses and Dissertations

The purpose of this mixed method study was to assess the effectiveness of agricultural communications curriculum developed and incorporated into a semester-long agricultural leadership and communications course for secondary agricultural education programs in Arkansas. This study was comprised of three parts including a pilot test, teacher training assessment, and a descriptive field test over a two-year period. For the pilot test portion of the study, students (N = 297) participated in newly developed instructional modules (careers, writing, design, and multimedia) predetermined by a committee of agricultural education and communications faculty at the University of Arkansas. The pilot test indicated students' knowledge ...


A Content And Visual Analysis Of Promotional Pieces Used To Promote The Arkansas Soybean Promotion Board, Amy Hughes May 2014

A Content And Visual Analysis Of Promotional Pieces Used To Promote The Arkansas Soybean Promotion Board, Amy Hughes

Theses and Dissertations

A communications campaign was developed for a commodity promotion board in the southern region of the United States with promotional pieces produced and disseminated by a third-party communications group to reach the general public, soybean producers, and animal agriculture producers target audiences through key themes and messages. A systematic, content-driven approach assessed the potential impact on perceptions of individuals. This study utilized a content and visual analysis based on semiotic theory to analyze creative pieces and focus groups to assess content quality and impact.

Many of the creative pieces displayed too many themes, and the themes did not accurately represent ...


Perceptions Of The Audubon Cooperative Sanctuary Program: A Survey Of Superintendents On University - Affiliated Golf Courses In The U.S., Jacob Joseph Kuban Apr 2014

Perceptions Of The Audubon Cooperative Sanctuary Program: A Survey Of Superintendents On University - Affiliated Golf Courses In The U.S., Jacob Joseph Kuban

Theses and Dissertations

This project assessed U.S. university-affiliated golf courses on their certification level in regards to the Audubon Cooperative Sanctuary Program (ACSP) for golf courses and the amount of college or university student involvement with the certification process. Certification through the ACSP is designed to recognize environmental stewardship and sustainable golf course management practices. A cross-sectional, self-administered online questionnaire was administered to U.S. university golf course superintendents via an online link to the survey in an e-mail message. The population of 120 university golf course superintendents was asked to participate. Data was analyzed using Qualtrics, SPSS, SAS, and Microsoft Excel ...


Nitrogen Rate Optimization For Grain Yield Within Fall And Spring Applications, Justin Wheeler Apr 2014

Nitrogen Rate Optimization For Grain Yield Within Fall And Spring Applications, Justin Wheeler

Theses and Dissertations

This thesis is a comprehensive analysis of research, investigating the impact of fall and spring applied nitrogen at various rates on the vulnerability of fall applied nitrogen, nitrogen uptake, and corn yields. In addition, optimal nitrogen rates and timing were evaluated across East Central Illinois.


Effects Of River Stages And Barge Rates On Illinois Corn And Soybean Basis, Zachary Gass Mar 2014

Effects Of River Stages And Barge Rates On Illinois Corn And Soybean Basis, Zachary Gass

Theses and Dissertations

During the drought of 2012 the Midwest suffered one of the worst droughts to date which created adverse effects on multiple sectors of the agriculture economy including river transportation. During the last week of 2012, grain barge movement decreased by 41 percent from the same period in 2011. This thesis identifies the relationship between river stages, barge rates, and Illinois corn and soybean basis. By implementing simple regression techniques, river stages and barge were each used as an independent variable and experimental region basis minus control region basis was used as the dependent variable. Multiple regression techniques combined both river ...


Nursery Pig Growth Response To Feed Ingredients And Feed Additives: I). Spray-Dried Blood Plasma Vs. Spray-Dried Egg Effect On Nursery Pig Growth Performance Ii). Effect Of Α-Galactosidase And Citric Acid On Nursery Pig Growth Performance When Added To A Corn-Soybean Meal Diet, Elizabeth Kaye Pegg Mar 2014

Nursery Pig Growth Response To Feed Ingredients And Feed Additives: I). Spray-Dried Blood Plasma Vs. Spray-Dried Egg Effect On Nursery Pig Growth Performance Ii). Effect Of Α-Galactosidase And Citric Acid On Nursery Pig Growth Performance When Added To A Corn-Soybean Meal Diet, Elizabeth Kaye Pegg

Theses and Dissertations

Nursery pigs are defined as newly weaned pigs adjusting to a solid-plant based diet after being weaned from a milk-based diet. Weaning has nutritional, environmental, social, and physiological impacts on the nursery pig. Nutrition is modified to accommodate changing needs of the nursery pig. The nursery pig diet is developed by adding highly digestible animal proteins to the standard corn-soybean meal swine diet. Development of the nursery diet improves pig performance but animal-based proteins can be expensive and do not address undigestible components of the plant-based ingredients. Addition of lower-cost animal proteins, addition of enzymes, and addition of acidifiers have ...