Predicting Biochemical Acclimation Of Leaf Photosynthesis In Soybean Under In-Field Canopy Warming Using Hyperspectral Reflectance,
2022
Tohoku Agricultural Research Center, NARO
Predicting Biochemical Acclimation Of Leaf Photosynthesis In Soybean Under In-Field Canopy Warming Using Hyperspectral Reflectance, Etsushi Kumagai, Charles H. Burroughs, Taylor L. Pederson, Christopher M. Montes, Bin Peng, Hyungsuk Kimm, Kaiyu Guan, Elizabeth A. Ainsworth, Carl J. Bernacchi
United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications
Traditional gas exchange measurements are cumbersome, which makes it difficult to capture variation in biochemical parameters, namely the maximum rate of carboxylation measured at a reference temperature (Vcmax25) and the maximum electron transport at a reference temperature (Jmax25), in response to growth temperature over time from days to weeks. Hyperspectral reflectance provides reliable measures of Vcmax25 and Jmax25; however, the capability of this method to capture biochemical acclimations of the two parameters to high growth temperature over time has not been demonstrated. In this study, Vcmax25 and Jmax25 were measured over multiple growth stages during two growing seasons for field-grown …
Far-Red Photography For Measuring Plant Growth: A Novel Approach,
2022
Utah State University
Far-Red Photography For Measuring Plant Growth: A Novel Approach, Cole Webb, F. Mitchell Westmoreland, Bruce Bugbee, Xiaojun Qi
Techniques and Instruments
A critical part of agricultural studies is determining plant stress and growth rate. Modern computer vision provides a series of tools that can be applied to derive this data. In this paper, we will show our findings, analyze their accuracy, and define a system capable of deriving this data with near-human accuracy in a fraction of the time. Denoising techniques applicable to this system will be discussed, as will our discoveries and findings. Finally, suggestions for further research opportunities will be provided.
Skeleton Weed Program 2021/22 : Annual Report To Grain Growers,
2022
Department of Primary Industries and Regional Development, Western Australia
Skeleton Weed Program 2021/22 : Annual Report To Grain Growers, Department Of Primary Industries And Regional Development, Western Australia
Agriculture reports
No abstract provided.
Characterizing Implied Volatility Functions From Agricultural Options Markets,
2022
University of Arkansas, Fayetteville
Characterizing Implied Volatility Functions From Agricultural Options Markets, Andrew M. Mckenzie, Michael R. Thomsen, Michael K. Adjemian
Agricultural Economics and Agribusiness Faculty Publications and Presentations
We provide the first comprehensive characterization and comparison of implied volatility functions for five major agricultural options markets—corn, soybeans, soft red winter wheat, live cattle, and feeder cattle—using intraday tick data. Our results show that cattle markets exhibit a distinct leftward skew, which is puzzling and indicates that out-of-the-money traded put options are theoretically overpriced. In contrast, we find that grain market implied volatility functions display a flatter, less pronounced smile pattern. We examine market sentiment induced short-term hedging pressures using Commodity Futures Trading Commission reports, and market uncertainty around Cattle on Feed reports, as potential causes of the cattle …
Minimum Dataset And Metadata Guidelines For Soil-Test Correlation And Calibration Research,
2022
University of Arkansas, Fayetteville
Minimum Dataset And Metadata Guidelines For Soil-Test Correlation And Calibration Research, Nathan A. Slaton, Sarah E. Lyons, Deanna L. Osmond, Sylvie M. Brouder, Steve W. Culman, Gerson L. Drescher, Luciano C. Gatiboni, John Hoben, Peter J.A. Kleinman, Joshua M. Mcgrath, Robert O. Miller, Austin Pearce, Amy L. Shober, John T. Spargo, Jeff J. Volenec
Crop, Soil and Environmental Sciences Faculty Publications and Presentations
Soil-test correlation and calibration data are essential to modern agriculture, and their continued relevance is underscored by the expansion of precision farming and the persistence of sustainable soil management priorities. In support of transparent, science-based fertilizer recommendations, we seek to establish a core set of required and recommended information for soil-test P and K correlation and calibration studies, a minimum dataset, building on previous research. The Fertilizer Recommendation Support Tool (FRST) project team and collaborators are developing a national database that will support a soil-test-based nutrient management decision aid tool. The FRST team includes over 80 scientists from 37 land-grant …
2022 Personal-Sized Triploid Watermelon Cultivar Evaluation In Indiana,
2022
Purdue University
2022 Personal-Sized Triploid Watermelon Cultivar Evaluation In Indiana, Wenjing Guan, Dean Haseman, Dennis Nowaskie, Dan Egel
Midwest Vegetable Trial Reports
Personal-sized (mini) watermelons refer to fruit weighing 4.4 to 8.8 lb (Vinson et al., 2010), with 6-7 lb considered the ideal size. Both seeded and seedless personal-sized cultivars are commercially available. In the annual cultivar trial, we evaluate the performance of personal-sized triploid watermelons in southern Indiana.
2022 Standard-Sized Triploid Watermelon Cultivar Evaluation In Indiana,
2022
Purdue University
2022 Standard-Sized Triploid Watermelon Cultivar Evaluation In Indiana, Wenjing Guan, Dean Haseman, Dennis Nowaskie, Dan Egel
Midwest Vegetable Trial Reports
A total of 6,600 acres of watermelons were planted in southern Indiana in 2021, making Indiana the sixth largest watermelon production state in the US, following Florida, Texas, Georgia, California, and North Carolina (USDA, 2022). Farmers select cultivars based on yield, disease resistance and fruit quality. This annual watermelon cultivar evaluation trial aims to provide watermelon producers and seed companies with information on the performances of different watermelon cultivars in southern Indiana.
Impacts Of Nitrogen Rate And Source Following Green Manure On Broccoli Yield,
2022
University of Minnesota - Twin Cities
Impacts Of Nitrogen Rate And Source Following Green Manure On Broccoli Yield, Charlie Rohwer
Midwest Vegetable Trial Reports
Cover crops are beneficial to soil structure and processes and can provide nitrogen (N) to a subsequent crop. Practical studies of N availability from cover crops and organic fertilizers in naive (transitioning) soils are helpful for growers to achieve desirable yield. Microbial soil inoculants (biostimulants) may enhance availability of organic N sources. We found a spring-planted pea-oat cover crop provided less than 27 pounds of N to a subsequent broccoli crop, and no impact of a commercial biostimulant on broccoli yield or development rate. Availability of N from organic amendments used is discussed.
Application Of Mass Spectrometry For Characterization Of Plant-Based Phenolics And Alkaloids,
2022
University of Kentucky
Application Of Mass Spectrometry For Characterization Of Plant-Based Phenolics And Alkaloids, Masoumeh Dorrani
Theses and Dissertations--Chemistry
Plant-derived compounds have the potential to produce value-added compounds with a variety of applications. For example, the lignin part of the lignocellulosic biomass, produced in large quantities as waste from the paper and pulp industries, is a rich source of phenolics with potential applications in the renewable energy sector, pharmaceutical, and chemical industries. On the other hand, plant alkaloids are the primary source for developing plant-derived therapeutics. Unfortunately, the recalcitrant nature of plant cell walls, low extraction yields of small secondary metabolites, and the lack of effective analytical methods for a rapid and accurate identification of plant-based compounds and plant’s …
Phomopsis Stem Canker Of Sunflower (Helianthus Annuus L.): Etiology And Epidemiological Conditions Affecting Endophytic Population Of Diaporthe Spp., And Fungicide Efficacy,
2022
South Dakota State University
Phomopsis Stem Canker Of Sunflower (Helianthus Annuus L.): Etiology And Epidemiological Conditions Affecting Endophytic Population Of Diaporthe Spp., And Fungicide Efficacy, Nabin Kumar Dangal
Electronic Theses and Dissertations
Phomopsis stem canker (PSC), caused by species of Diaporthe, is a major disease of sunflower (Helianthus annuus L.) in the U.S., which can cause yield loss over 40%. The disease prevalence increased since 2010 in the major sunflower producing U.S. states of Nebraska, Minnesota, North Dakota, and South Dakota. Previous studies on the use of foliar fungicides in managing Phomopsis stem canker indicated mixed results on their efficacy in disease reduction and yield gain. Additionally, we do not have sufficient information on asymptomatic colonization by endophytic Diaporthe on sunflower tissue and how foliar fungicide and weather parameters affect the prevalence …
Study Of Root System Architectural Traits Of Oat And Response To Endophyte Inoculation And Drought Stress,
2022
South Dakota State University
Study Of Root System Architectural Traits Of Oat And Response To Endophyte Inoculation And Drought Stress, Krishna Ghimire
Electronic Theses and Dissertations
Oat is an important cereal crop grown worldwide. Oats have the potential to contribute to human health due to their unique nutritional attributes. Developing oat cultivars with efficient root systems able to extract heterogeneously distributed soil resources can help maintain yield under drought conditions and in nutrient poor soil. Various root traits determine the soil volume that is explored by the root system for resource acquisition. Knowledge about the genetic control of oat root traits and response to biotic and abiotic environmental factors is lacking. Identifying quantitative trait loci associated with root traits and understanding the response of roots to …
Observing Gravitropism In Brassica Rapa Roots,
2022
Virginia Commonwealth University
Observing Gravitropism In Brassica Rapa Roots, Trang Ly, Maya O'Callagham, Lan Poeschl, Adil Saeed, George Zorn
UROP Posters
The objective of this experiment is to observe the effect of gravitropism on the orientation of Brassica rapa (B. rapa) roots. Specifically, amyloplasts that reside at the bottom of root tips act as gravity sensors. As plants are disturbed from upright orientation, roots automatically grow according to the downward pull of gravity. It is hypothesized that as the angle of rotation increases, the angle of root growth is inversely proportional. Five plants containing four seeds of B. rapa were grown over the course of 10 days. Each plates, aside from the control, were rotated once 90°, 80°, and 270° to …
The Comparison Of Three Different Fecal Egg Counting Techniques And Their Ability To Perform A Fecal Egg Count Reduction Test,
2022
Missouri State University
The Comparison Of Three Different Fecal Egg Counting Techniques And Their Ability To Perform A Fecal Egg Count Reduction Test, Diana J. Summitt
Graduate Theses/Dissertations
A comprehensive gastrointestinal parasite control program includes an understanding of common parasites, application of chemotherapeutic agents, as well as frequent and appropriate diagnostic testing. An effective control program is essential for facilities such as animal shelters, that deal with large populations of transient canines with unknown parasite exposure and deworming history. The identification of a sensitive flotation method to evaluate anthelmintic efficacy is critical in monitoring parasite populations for drug resistance. The objective of the current study was to compare three different fecal egg counting technologies and their ability to perform a fecal egg reduction test. The flotation techniques evaluated …
Policy Sustainability Issues: Case Study Of Cassava Farmers In Ikorodu. Lagos, Nigeria,
2022
Walden University
Policy Sustainability Issues: Case Study Of Cassava Farmers In Ikorodu. Lagos, Nigeria, Medinat Oluwatoyin Adetunji
Walden Dissertations and Doctoral Studies
The inconsistency and lack of continuity of Nigeria's agricultural policies impact the cassava sector. Despite being the world's biggest producer, the country is yet to benefit from the advantage due to a lack of sustainable growth. The situation manifests in terms of low productivity, low production level, and poor income to the farmers. The purpose of this qualitative study was to investigate the experiences and perceptions of the cassava farmers on cassava policies and the effect on their income and livelihoods in the Ikorodu local government of Lagos State. This qualitative study adopted a case study research design using participatory …
Evaluating The Impact Of Off-Farm Decisions On Federal Government Program Utilization And Financial Success For Missouri's Beginning Farmers,
2022
Missouri State University
Evaluating The Impact Of Off-Farm Decisions On Federal Government Program Utilization And Financial Success For Missouri's Beginning Farmers, Lyndsey Ann Parker
Graduate Theses/Dissertations
Farmers and ranchers will have to increase production by approximately 70% by the year 2050 according to the American Farm Bureau Federation (2017). People in the agriculture industry face several challenges from start-up costs to limited land availability (Ahearn, 2011). There are federal and state government programs available to assist with some of these challenges but bring their own hardships as well. This study measures off-farm decisions that affect financial performance and utilization of government programs for Missouri’s farmers and ranchers. Three types of financial performance of Missouri farms are prioritized in this study, liquidity (current ratio), solvency (debt-to-asset ratio), …
Public Procurement Practices And Policies: Implications For Public Research And Development In The Philippines,
2022
College of Public Affairs and Development, University of the Philippines Los Baños (UPLB), Laguna, Philippines
Public Procurement Practices And Policies: Implications For Public Research And Development In The Philippines, Nelson Jose Vincent B. Querijero, Rhea L. Gumasing, Arlene C. Gutierrez, Ruth Anne T. Ruelos, Charina Krissel D. Tingson
Journal of Public Affairs and Development
This study examines procurement practices and policies that hinder or facilitate public research and development. An online survey and interviews with key informants in 44 research development institutions (RDIs) in the Philippines were conducted. Participants include Project Leaders, members of the Bids and Awards Committee (BAC), the BAC secretariat, chief accountants, technical working groups, and suppliers. The results show that some procurement policies, workflows, and capacities of the procuring entities contribute to procurement delays. A lack of qualified or suitable suppliers and a limited market of highly specialized and scientific equipment are also factors affecting procurement efficiency. It is recommended …
Revisiting Participatory Rural Appraisal (Pra) Related Studies And Exploring Pra's Success Determinants: A Content Analysis,
2022
College of Arts and Sciences, Cavite State University Main Campus, Cavite, Philippines
Revisiting Participatory Rural Appraisal (Pra) Related Studies And Exploring Pra's Success Determinants: A Content Analysis, Raquel Garcia-Agustin
Journal of Public Affairs and Development
Participatory Rural Appraisal (PRA) has shown that participation in development programs in poor communities can be empowering not only for the community members but also for the development workers. However, not all PRAs have seen successes especially in fulfilling their mission to encourage real participation. Hence, it is imperative to understand whether PRA has led to adequate understanding of indigenous perspective to call for action and the interest PRA serves. This analysis aims to provide critical insights and reflections from the experiences of previously conducted PRAs. It further aims to reveal whether PRAs were used effectively and successfully according to …
Taiwanese Perceptions Of China, Taiwan, And Us Relations From 2016 To 2021,
2022
Graduate School of Global Studies, Doshisha University, Kyoto, Japan
Taiwanese Perceptions Of China, Taiwan, And Us Relations From 2016 To 2021, Wan-Ling Liao, Armand Christopher C. Rola
Journal of Public Affairs and Development
In 2016, a dramatic shift in Taiwan's politics caught China's attention. After the inauguration of President Tsai Ing-wen, Beijing increased the pressure on Taiwan. Aside from limiting Taiwan's international space, Beijing had taken other steps. This study aims to review the policy regarding the relationship among Taiwan, the US, and China. The primary data were gathered through interviews with Taiwanese key informants of different age groups. Secondary data were gathered from official documents, online sources, journal and news articles, and books. Based on the analysis of informants' opinions on this issue, the study found that the majority of informants prefer …
Foraging Behavior Of Honeybees Exposed To Mosquito Insecticides,
2022
Cal Poly Humboldt
Foraging Behavior Of Honeybees Exposed To Mosquito Insecticides, Samantha Marie Diel
Cal Poly Humboldt theses and projects
The main aim of this study was to quantify the effects of mosquito insecticides on honey bee (Apis mellifera), foraging behavior, explicitly assessing the impacts of adult mosquito control practices on honey bee health. The extent to which honey bees are exposed to pyrethrum, pyrethrins, permethrin, and pyrethroids is unknown, as are their effects on honey bee health and vitality. This study sought to answer this question by exposing honey bees to D-Phenothrin with the addition of Piperonyl butoxide (PBO), one of many synthetic pyrethroids widely used against adult mosquitoes to control mosquito-borne diseases. Honey bees were exposed to …
Analyzing Factors Influencing Secondary Agricultural Education Teachers’ Skill Level In Welding,
2022
East Texas A&M University
Analyzing Factors Influencing Secondary Agricultural Education Teachers’ Skill Level In Welding, Rafael Bakhtavoryan, Douglas D. Lavergne
Faculty Publications
The effects of secondary agricultural education teachers’ demographic characteristics on their propensity to become more skilled in welding were examined by estimating an ordered logit model for teachers in Northeast Texas. The sample of teachers was derived from the Agricultural Mechanic Competency Development survey for 2015. According to the estimation results, relative to female, being male was positively associated with being more skilled in welding. Compared to having a Master’s degree, having only a Bachelor’s degree was negatively associated with being more skilled in welding. Having five or less years of teaching positively affected becoming more skilled in welding compared …
