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Articles 1 - 14 of 14
Full-Text Articles in Life Sciences
Insights Into The Challenges Posed By Climate Change And Land Competition To Brazil’S Midwest Pulpwood Market, Roberto Hajime Sant Anna Kimura
Insights Into The Challenges Posed By Climate Change And Land Competition To Brazil’S Midwest Pulpwood Market, Roberto Hajime Sant Anna Kimura
Theses and Dissertations
I investigated the effect of climate change in one of the few expanding markets in the world in Brazil. In the last decades the demand for pulpwood increased from zero to 11 million tons, leading to an expansion of 700 thousand hectares of Eucalyptus plantation. In 2024, a new mill will start operating increasing the consumption of wood fiber by 8.2 million tons (+49%). I used mathematical programming to investigate how different scenarios of productivity and land will affect the market. My results showed that around 946,000 hectares (+124%) of additional timberland will be necessary in the upcoming decades. The …
Nutrient Optimization For Vegetable Production Under Decoupled Aquaponics Using Brackish Water, Salma Walid Hany Ahmed Abdelfattah
Nutrient Optimization For Vegetable Production Under Decoupled Aquaponics Using Brackish Water, Salma Walid Hany Ahmed Abdelfattah
Theses and Dissertations
As the world moves to more sustainable agriculture methods in the agribusiness industry, decoupled aquaponics is recognized as one of the newest techniques currently being utilized to achieve more local food security. As the topic is still freshly new within the industry, a finite number of publications and studies have been made that address the topic hands-on with its many variables. Subsequently, in this paper, an experiment was conducted to assess the most optimized production conditions of both lacinato kale (Brassica oleracea var.palmifolia) and Swiss chard Bright Light (Beta vulgaris ssp. Cicla var. flavescens) plants through the utilization of a …
The Impacts Of The Covid-19 Pandemic On The Food Security Of Mississippians, Hannah Noel Irwin
The Impacts Of The Covid-19 Pandemic On The Food Security Of Mississippians, Hannah Noel Irwin
Theses and Dissertations
Mississippi leads the United States in food insecurity, with 15.3% of Mississippians experiencing food insecurity in a given year. To determine the impacts of the COVID-19 pandemic on the food insecurity of Mississippians, a survey containing the USDA Household Food Security Questionnaire was distributed to adult Mississippi residents. By employing the USDA Household Food Security Scale and the Foster-Greer-Thorbecke Methodology, this study finds that the food insecurity rate, food insecurity gap, and squared food insecurity gap have worsened in Mississippi since the beginning of the COVID-19 pandemic. Additionally, this study finds that households which were food insecure prior to March …
Evaluating Cover Crops To Determine The Best Management Practice For The Suppression Of Tall Waterhemp And Italian Ryegrass, Samuel R. Reeves
Evaluating Cover Crops To Determine The Best Management Practice For The Suppression Of Tall Waterhemp And Italian Ryegrass, Samuel R. Reeves
Theses and Dissertations
To combat herbicide resistance among weeds, non-herbicide methods of control, such as cover crops, are becoming widely adapted. Experiments were conducted to determine how to effectively establish and manage cover crops in order to suppress tall waterhemp and Italian ryegrass and to assess their overall impact on soybean growth and yield. Various cover crop establishment methods were evaluated, and it was determined that interseeding at the R7 growth stage of soybean was the least effective method for proper cover crop establishment. Biomass data demonstrated that interseeding created the least amountof cover crop biomass, with no differences found among the other …
Efficiency Of Weights Matrix Specification In The Spatial Error Model, Cannon Kent
Efficiency Of Weights Matrix Specification In The Spatial Error Model, Cannon Kent
Theses and Dissertations
This study investigates and quantifies the effect of different specifications of the spatial weights matrix (��) on estimates and inferences in the context of a regression model using the lattice perspective with polygon-type data. The study also investigates an alternative to the specification of �� by estimating a spatial variance-covariance matrix based on known features of the spatial data. Previous literature has addressed the a priori construction of �� and selection criteria but assumes point-type data. This study’s primary contribution is the setup of a true and known benchmark that allows the comparison of the different specifications of ��. This …
Seasonal Management Strategies For Tarnished Plant Bug, Lygus Lineolaris (Palisot De Beauvois), In Midsouth Cotton Production Systems, Ryan Taylor Mann
Seasonal Management Strategies For Tarnished Plant Bug, Lygus Lineolaris (Palisot De Beauvois), In Midsouth Cotton Production Systems, Ryan Taylor Mann
Theses and Dissertations
The tarnished plant bug, Lygus lineolaris (Palisot de Beauvois), is considered the most economically important pest of midsouth cotton. This study was designed to understand the impact of tarnished plant bug populations in the later weeks of flowering cotton and residual effects of novaluron with subsequent applications. Experiments evaluated dynamic threshold approaches in the later flowering period of midsouth cotton, the impacts of novaluron plus subsequent applications at the 3rd week of square, as well as residual properties in a laboratory experiment. Results suggest that a dynamic late season approach can reduce the amount of insecticide applications targeting tarnished …
Effects Of The Inclusion Of Rice Hull Derived Bio-Oil On Wood Pellet Production, Tyler E. Lowe
Effects Of The Inclusion Of Rice Hull Derived Bio-Oil On Wood Pellet Production, Tyler E. Lowe
Theses and Dissertations
Wood pellet production has become an advancing industry for the sake of reducing greenhouse emissions into the atmosphere especially, in European Union countries. Researchers and industry executives seek new methods and materials to improve the pelletization process. Rice hulls or husks has the potential to aid in wood pelletization as they possess high calorific values. This study focuses on using rice hull derived bio-oil from pyrolysis, which will also decrease ash content, as an additive to aid in the wood pelletization process. Using two groups of rice hull derived bio-oil as an additive in wood pelletization: Group 1 uses heavy …
Some (Im)Material Girls, Living In (Im)Material Worlds, With Seeds, Stars, And Shit, Matthew Weiderspon
Some (Im)Material Girls, Living In (Im)Material Worlds, With Seeds, Stars, And Shit, Matthew Weiderspon
Theses and Dissertations
This writing situates material and gestural vocabularies cultivated in my artwork in relation to my lived experience; primarily my rural upbringing in Colorado. Scattered floor dispersals, calling sounds, and bodily movements desire reconsiderations of hope in precarity through a disorientation of place, association, scale, and language.
Egyptian Women’S Agriculture Contribution; Assessment Of The Gender Gap For Sustainable Development, Noha El Khorazaty
Egyptian Women’S Agriculture Contribution; Assessment Of The Gender Gap For Sustainable Development, Noha El Khorazaty
Theses and Dissertations
Women’s contribution to the agriculture sector in developing countries is undeniable, yet they do not have equal access to the resources and opportunities they need to be more productive. Sustainable development entails inclusive and effective management of natural resources, this entails gender equity in agriculture. Bridging the gender gap in agriculture far exceeds the benefits of the individual. According to the latest estimates bridging the yield gap in agricultural productivity could possibly decrease the numbers of undernourished people in the world by around 100 – 140 million people. Sustainable agriculture development and gender equity necessitate policy interventions targeting the gender …
Impact Of Selected Financial Measures On The Term Debt Repayment Ability Of Illinois Grain Farms, Samuel Awortwe Johnson
Impact Of Selected Financial Measures On The Term Debt Repayment Ability Of Illinois Grain Farms, Samuel Awortwe Johnson
Theses and Dissertations
A clear and accurate assessment of the financial performance of a farm business is an important component of financial management at any time but becomes even more crucial in periods of economic downturn in the farm sector. Farmers continue to increase their debt even though the prices of commodities are low, and the prices of inputs are high (Krapf, Raab, & Zwilling, 2017). In addition, high family living expenses can also place financial pressure on farms (Scott, 2016). This study focused on identifying and estimating the impact of key factors which included financial measures and family living expenses on the …
Determining The Effects Of Sulfur Fertility Levels On Edamame Soybean [ Glycine Max ( L. ) Merrill ] Protein Components, Theoneste Nzaranyimana
Determining The Effects Of Sulfur Fertility Levels On Edamame Soybean [ Glycine Max ( L. ) Merrill ] Protein Components, Theoneste Nzaranyimana
Theses and Dissertations
Edamame [Glycine max (L.) Merr.] a vegetable type soybean is harvested and consumed before reaching its maturity stage (R6). Its health properties drew attention to U.S. consumers because of its high protein content. Proteins are the major structural component of all cells in the living organisms. They are made of essential and non-essential amino acids which play a big role in growth and development and are source of energy. Proteins act as enzymes, antibodies, and hormones and blood protein. Sulfur (S) is a component of the amino acids cysteine (Cys) and methionine (Met) which are the building blocks for proteins. …
The Perceptions Of The Unwanted Horse Population In Illinois 2015, Kelsey Annette Schueler
The Perceptions Of The Unwanted Horse Population In Illinois 2015, Kelsey Annette Schueler
Theses and Dissertations
A survey to measure the perceptions of the unwanted horse population in the state of Illinois was developed. Horse owners, non-horse owners, and equine industry stakeholders in Illinois were the focus of the study. Participants were surveyed on their perceptions, awareness, and knowledge of the unwanted horse population in the state. Each survey included questions of current knowledge of legislation, background with equine, current methods to control the unwanted horse population, and methods they believe would benefit the population. A block style survey was developed, emailed to a statewide equine association listserv, and advertised through articles online. Findings show that …
Effect Of Food Aid Delivery Mode On Food Production In Recipient Nation, Steven Marc Wolf
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, …
Effects Of River Stages And Barge Rates On Illinois Corn And Soybean Basis, Zachary Gass
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 …