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Articles 1 - 16 of 16
Full-Text Articles in Life Sciences
How Are Agricultural Research Projects Conceiving Innovation? An Assessment Of The European Union Multi-Actor Projects, Samuel Brea Martinez-Collado
How Are Agricultural Research Projects Conceiving Innovation? An Assessment Of The European Union Multi-Actor Projects, Samuel Brea Martinez-Collado
Graduate Theses and Dissertations
Horizon research programs are the European Union’s lighthouse for innovation and research concerning the agri-food chain, the management of natural resources, and the bioeconomy. Their innovation strategy approach is one that pursues the practical application of the research via the collaboration of all actors involved. Such strategy is the reflection of a Multi-Actor Approach as their procedure to enhance innovation. This paper presents the main trends and directions 101 Multi-Actor Projects (MAPs) are following on said approach towards innovation. The analysis is based on the use of well-defined “pathways” and “measures” proposed in the Guidelines for Evaluation of Innovation in …
Economic Potash Fertilizer Rate Recommendations, Kimberly B. Oliver
Economic Potash Fertilizer Rate Recommendations, Kimberly B. Oliver
Graduate Theses and Dissertations
This thesis is comprised of two studies that estimate profit-maximizing potassium (K) fertilizer application rates for various crops across different time periods. Estimation of profit-maximizing fertilizer-K rate (K*) for both studies considered the initial soil test level of K (STK) and yield response information, as traditional recommendations do, and added crop price and the cost of fertilizer. Profit maximum occurs where the marginal revenue from additional yield is equal to the marginal cost of applying an additional unit of fertilizer-K. The first study calculated K* for corn (Zea mays) and cotton (Gossypium hirsutum) and compared results to previous studies on …
Comparing Organic And Conventional Yield Responses To Climate Variations, Joost Wilken Meyer
Comparing Organic And Conventional Yield Responses To Climate Variations, Joost Wilken Meyer
Graduate Theses and Dissertations
This thesis compares the responses of organic yields and conventional yields towards climate variations. To achieve this objective, weather variables such as growing season weather conditions (average temperature, precipitation, cloud cover, relative humidity, drought index), weather anomalies, the occurrence of severe or extreme droughts and excessive rainfalls, are combined with 23 data sets gathered from previous studies that compare organic and conventional yields from the same location and time periods. To narrow the scope, the thesis focuses on soybean, maize, and wheat production in Europe and North America. Study-level fixed-effects models are used to control for any time-invariant factors such …
Use Patterns And Influencing Factors Of Irrigation Best Management Practices In The Lower Mississippi River Basin, Merri E. Day
Use Patterns And Influencing Factors Of Irrigation Best Management Practices In The Lower Mississippi River Basin, Merri E. Day
Graduate Theses and Dissertations
This study uses the 2016 Irrigation Survey from Arkansas, Louisiana, and Mississippi to document the use of irrigation best management practices (IBMPs), analyze use patterns, and use quantitative methods to determine factors that influence producers’ decisions regarding IBMPs. IBMPs included in the survey can be grouped as: field management practices (zero-grade leveling, precision-grade leveling, end blocking, warped surface, and deep tillage), water flow control practices (computerized pipe-hole selection, multiple-inlet irrigation, surge irrigation, alternate wetting and drying, cutback irrigation, flow meters, and pump timers), water recovery/storage practices (tail-water recovery system and on-farm storage reservoir), and advanced irrigation scheduling practices (soil moisture …
Data Analytics For Sustainable Food And Agriculture Systems, Megan Lord Reavis
Data Analytics For Sustainable Food And Agriculture Systems, Megan Lord Reavis
Graduate Theses and Dissertations
The increasing concentration of anthropogenic greenhouse gases in the atmosphere is altering the climate, posing a serious threat to global agriculture and food security. Agriculture and food production contribute a quarter of all GHG emissions produced, so there is a critical need to limit emissions in this area while increasing food production to feed the anticipated 10 billion people by 2050. To address the needs of the future, data-driven solutions are needed to guide decision-making and provide support for actionable climate mitigation and survival strategies. Research efforts must be focused on analyzing problems on multiple scales, identifying new ways to …
Impact Of Planting Arrangement And Drill Row Spacing For Direct-Seeded, Delayed Flood Rice, Mary Jane Lytle
Impact Of Planting Arrangement And Drill Row Spacing For Direct-Seeded, Delayed Flood Rice, Mary Jane Lytle
Graduate Theses and Dissertations
Direct-seeding is the most frequently utilized planting practice in Arkansas and Mid-South rice (Oryza sativa L.) production. Enhanced plant density and more rapid rice canopy formation may result from the implementation of innovative plant arrangements and spacings. Studies were initiated in 2019 and continued into 2020 to examine different cultural management practice experiments, including evaluating the impacts of planting arrangement, row spacing, and seeding rates on rice stand density, canopy coverage, grain yield, and milling yield. These small-plot trials were conducted at two locations, a silt loam site and a clay site, representative of soils produced to rice in eastern …
Dollar Stores And Supermarket Survivability In Non-Metropolitan Us Communities, Cami Farmer
Dollar Stores And Supermarket Survivability In Non-Metropolitan Us Communities, Cami Farmer
Graduate Theses and Dissertations
With the growing popularity of dollar stores, concerns have surfaced over the potential relationship between dollar stores and the closures of grocery stores. Healthy food accessibility for consumers, particularly those in rural areas, has additionally become of great interest. This thesis aims to investigate the potential relationship of dollar store presence and grocery store closures. Data used included County Business Patterns, Rural Urban Continuum Codes, American Community Survey, and authorized SNAP retailer data. The spatial distance between grocery stores and the number of dollar stores at various radii were calculated. Following the computation of the number of dollar stores surrounding …
Precise Nitrogen Recommendations Improve Economic And Environmental Outcomes In Arkansas Rice Production, Cristin Roberts
Precise Nitrogen Recommendations Improve Economic And Environmental Outcomes In Arkansas Rice Production, Cristin Roberts
Graduate Theses and Dissertations
Soil testing has become an increasingly important tool in making agronomically efficient production management decisions. N-STaR is a N test used in rice production and is unique in its ability to selectively quantify soil organic-N compounds which are readily mineralizable for plant N uptake and contribute to growth and yield. This study uses historical (2002–2018) adoption rates of N-STaR, which is funded through Rice Checkoff funds, to calculate the total cost savings from N-STaR adoption. These cost savings alone would be the “typical” benefits used in a benefit-cost ratio of a public ally funded research program like N-STaR. However, we …
Evaluating The Economics Of Gluten-Free Households, Keia Mornys Alicia Jones
Evaluating The Economics Of Gluten-Free Households, Keia Mornys Alicia Jones
Graduate Theses and Dissertations
Over the past two decades, the diagnoses of gluten allergies and celiac disease has increased significantly. Although there has been no development of a cure for either ailment, these conditions can be managed by the elimination of glutenous foods from a person’s diet. In previous studies, the financial cost of replacing or excluding glutenous foods was higher than the financial cost of diets that do not exclude gluten. The objective of this study is to examine the differences in the economic feasibility of a conventional diet in comparison to a gluten-free diet. Using a sample of foods and prices from …
Are Rice Markets In Bangladesh Efficiently Pricing Rice Based On Quality? An Empirical Assessment, Indrani Saha
Are Rice Markets In Bangladesh Efficiently Pricing Rice Based On Quality? An Empirical Assessment, Indrani Saha
Graduate Theses and Dissertations
Rice is an important staple for more than half of the world’s population and is the main staple in Bangladesh, accounting for 65 percent to 70 percent of the daily calorie intake. The importance of rice consumption and the high level of food insecurity in Bangladesh highlights the importance of having markets that efficiently price rice according to consumer preferences. This study aims to assess how effectively rice prices in Bangladesh are reflective of rice quality. More specifically, we estimate how the rice market is currently pricing selected rice quality attributes, such as broken percentage, chalk percentage, kernel size and …
The Influence Of Peer Irrigators On The Extensive And Intensive Margin Of Irrigation Techniques, Victoria Bailey
The Influence Of Peer Irrigators On The Extensive And Intensive Margin Of Irrigation Techniques, Victoria Bailey
Graduate Theses and Dissertations
We examine how irrigation techniques in use by family and friends influence the use and share of land utilizing different irrigation techniques by Arkansas producers. A bivariate sample selection model simultaneously estimates how farm characteristics determine the use and explain the share of a farm that utilizes an irrigation technique. We find that the irrigation techniques in use by family and friends do affect the irrigation techniques a producer uses and the share of acres utilizing different irrigation techniques. A producer with a family or friend that uses end-blocking irrigation is 41% more likely to use end-blocking themselves. Having a …
Economic And Ecosystem Impacts Of Gm Maize In South Africa, Kristiina Ala-Kokko
Economic And Ecosystem Impacts Of Gm Maize In South Africa, Kristiina Ala-Kokko
Graduate Theses and Dissertations
White maize in South Africa is the only staple crop produced on a widespread commercial basis for direct human consumption using genetically modified (GM) cultivars. Using a combined economic and environmental approach, we estimate the total welfare benefits attributable to GM white maize in South Africa for 2001-2018 are $694.7 million. Food security benefits attributable to GM white maize in South Africa also manifest through an average of 4.6 million additional white maize rations annually. To achieve these additional annual rations using conventional hybrid maize, the additional land required would range from 1,088 hectares in 2001 to 217,788 hectares in …
Economic Feasibility Of Sub-Surfaced Poultry Litter, James Timothy Stults
Economic Feasibility Of Sub-Surfaced Poultry Litter, James Timothy Stults
Graduate Theses and Dissertations
Livestock producers routinely spread fertilizer or broadcast poultry litter to improve forage production. With poultry litter widely available across the Southeastern United States and a cheaper source of plant nutrition than fertilizer when proximal to application sites, the novel application of litter below the soil surface, while costly, allows for greater nutrient retention than broadcasting. Since quantifying costs and benefits of sub-surface litter application (SSLA) is complex, we develop and present a spreadsheet tool for automated comparison between SSLA, fertilizer, and broadcasted litter for user-specific scenarios involving equipment choices (new, used, custom), desired nutrient needs for crops grown, litter nutrient …
Short-Term Effects Of Winter Cover Crops On Soil Properties, Yield, And Partial Returns In A No-Tillage Soybean Rotation, Drew Dillon Kirkpatrick
Short-Term Effects Of Winter Cover Crops On Soil Properties, Yield, And Partial Returns In A No-Tillage Soybean Rotation, Drew Dillon Kirkpatrick
Graduate Theses and Dissertations
Cover crops have the potential to provide many benefits including weed suppression, erosion control, and improvements to soil quality. These benefits can be affected by species, biomass accumulation, and management practices. Although large amounts of biomass are good for maximizing benefits, it can result in problems for establishing the subsequent crop. Soybean [Glycine max (L.) Merr.] accounts for over 50% of Arkansas crop hectares annually; therefore, understanding the effect that a cover crop can have on the following soybean crop is crucial to the successful implementation of cover crops within the state. A study was established to evaluate winter cover …
Quality Determinates Of Rice Price In Open Bag Markets In Sub-Saharan Africa, Bailey Peterson-Wilhelm
Quality Determinates Of Rice Price In Open Bag Markets In Sub-Saharan Africa, Bailey Peterson-Wilhelm
Graduate Theses and Dissertations
Weaknesses in the grades and standards system in low-income countries across Sub-Saharan Africa undermine the transparency of agricultural markets. In the Democratic Republic of the Congo (DRC), Ghana and Mozambique rice is predominately sold in open bags and if rice price does not reflect its quality, then inefficiencies may lead to consumer welfare losses. Importantly, it is possible that impoverished communities are priced out of the market due to inflated and inefficient prices. The objective of this study is to examine determinates of rice price by estimating the impact of selected rice quality attributes on rice prices in DRC, Ghana …
Analyzing Purchase Behavior For Domestic And Imported Dry Wines In The U.S. Market Using Panel Data, Nadica Koskarovska
Analyzing Purchase Behavior For Domestic And Imported Dry Wines In The U.S. Market Using Panel Data, Nadica Koskarovska
Graduate Theses and Dissertations
The objective of this study is to explore wine purchase behavior in the United States market, including different off-premise channels using AC Nielsen panel data and wine prices and rankings from the Wine Enthusiast database of wine reviews. The purpose of this thesis is to identify factors that impact customer loyalty to retail wine brands. In so doing my goal is to provide information that can be used to improve marketing efforts of small wineries that are seeking to grow into mainstream retail formats. The results suggest that efforts to build brand equity will be more successful if the brand …