Digital Commons Network^™

Phenotypic Plasticity Of Diverse Sorghum Varieties In Response To Nitrogen Deficit Stress, Mackenzie Zwiener

Department of Agronomy and Horticulture: Dissertations, Theses, and Student Research

The movement of nutrients from old vegetative tissue to young leaves and reproductive organs is known as senescence. Senescence can be influenced by the environment of a plant, such as, drought, heat, and nutrient stress. These environmental stressors can also influence canopy architecture. Crop canopy consists of several traits including: leaf number, angle, length and width. Past research in crops like maize and rice have shown significant influences of more erect leaves, including, the ability for increased planting density, which optimizes light interception and increases yield. In a field trial of a sorghum association panel including 345 different sorghum varieties …

The Importance Of Goats In The World, Mahendra Lohani, Dilip Bhandari

Professional Agricultural Workers Journal

It is a challenge to transform the mindset of subsistence farmers to consider goats as a productive asset. Goat health, breeding, housing and nutrition are the main challenges in a smallholder production system. The development of the goat market sector is informal and underdeveloped. As a result, goats have not been identified as a significant contributor to the national gross domestic product. Many development organizations consider goats a preferred livestock commodity for poverty alleviation. Therefore, it is desirable to have a systematic approach to optimize goat production for smallholders. A smallholder goat value chain works well with a focus on …

Civic Agriculture In Review: Then, Now, And Future Directions, Allison Kaika, Alexis Racelis

School of Integrative Biological & Chemical Sciences (Formerly Dept. of Biology)

"Civic agriculture," a term first coined by rural sociologist Thomas Lyson, refers to forms of agriculture that occur on a local level, from production to consumption, and are linked to a community's social and economic development. Sixteen years since its original articulation, the term "civic agriculture" has taken on greater significance in research, political activism, and community organizing. Grown from the roots of civic community theory, civic agriculture functions as a new branch of civic community theory that is ripe for theorization. In revisiting the foundations of the term, this review paper seeks to consolidate current and future research in …

Do Long-Term Conservation Pasture Management Practices Influence Microbial Diversity And Antimicrobial Resistant Genes In Runoff?, Yichao Yang, Amanda J. Ashworth, Lisa M. Durso, Mary Savin, Jennifer M. Debruyn, Kimberly Cook, Philip A. Moore Jr, Philip R. Owens

United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications

Runoff from land-applied manure and poultry litter is one mechanism by which manure-borne bacteria are transported over large distances in the environment. There is a global concern that antimicrobial resistant (AMR) genes may be transmitted through the food chain from animal manures to soil to surface water. However, details are lacking on the ecology of AMR genes in water runoff as well as how conservation management practices may affect the runoff microbiome or minimize the movement of AMR genes. The aim of this study was to identify microbial community structure and diversity in water runoff following 14-years of poultry litter …

The One – Way (Agri)Cultural Mirror: A Case Study Of How Young Agriculturalists Understand And Experience Culture, Janiece M. Pigg

LSU Master's Theses

As the global economy continues to transform how society operates, cultural competence has become a buzzword in education, professional development, research, government, and healthcare (Gay, 1994; Gallus et al., 2014). Cross et al. (1989) developed the most accepted definition of cultural competence: “a set of congruent behaviors, attitudes, and policies that come together in a system, agency, or among professionals and enable that system, agency, or those professionals to work effectively in cross-cultural situations” (p. 13).

Despite this, little to no research has been devoted to understanding cultural competence in agriculture. Thus, a need emerged to describe the cultural competence …

Implementing Four Modeling Improvement Strategies To Measure The Economic Contribution Of The Alligator Farming Industry In Louisiana, Ilich Fernan Rosales Chiessa

LSU Master's Theses

The alligator industry in Louisiana has not had a study in thirty years that has measured its economic contribution. The industry has changed structurally over that period, and it produces more alligator skins but is concentrated in a smaller number of producers. With current threats to the industry through potential bans on alligator sales in states like California, the importance of these studies for the industry are more important now than ever. This study measures the economic contribution of American alligator across the supply chain of the state of Louisiana through four different modeling improvement strategies. These consist of using …

Attitudes Of Fruit And Vegetable Farmers Towards Organic Farming In Kathmandu Valley, Nepal, Dilip Nandwani, Dinesh Jamarkattel, Khem Raj Dahal, Ritikshya Poudel, Suman Giri, Toya Nath Joshi

Agricultural and Environmental Sciences Faculty Research

Organic farming is increasingly popular among the farmers of Kathmandu valley. However, the organic growers have been facing issues in production, organic certification, and product marketing. To date, little is known about the challenges faced by the organic growers in Kathmandu valley. This study aimed to explore the status of organic farming, attitudes of farmers towards organic farming, their suggestions for improvement, and strengthening the value chain of organic products. Face-to-face interviews were conducted at Agriculture Knowledge Centre, Lalitpur, Nepal during December 2019 with 37 organic growers directly or indirectly involved in organic farming. The results showed that organic growers …

Evaluation Of Supplementing Whole Cottonseed Within Feedlot Rations During The Stockerphase Of Production With The Goal Of Increasing Average Daily Gain, Emily Lauren Cook

Masters Theses & Specialist Projects

Beef calves are weaned at 6-months of age and enter the stocker phase of beef production. Stocker producers have the primary goal of adding weight inexpensively to increase profit on weaned calves. Whole cottonseed is an inexpensive feed ingredient that is popularly top-dressed within dairy and finishing beef diets and is high in protein and energy. During three periods lasting 50-days (fall 2019, fall 2020, and spring 2020), freshly weaned calves were placed on a finishing ration with the goal of increasing average daily gain. Base rations were calculated at 25% tall fescue hay, 23% corn, and 52% distillers’ solubles. …

Nebline, April 2021

NEBLINE Newsletter Archive from Nebraska Extension in Lancaster County

Experiential Learning Teaches Skills and More

DIY FitBall: A Fun Fitness Activity

Recipe of the Month

Get Ready to Control Pine Tip Blight

Garden Guide

2021 Prennial Plant of the Year

Naturally Occurring Elements in Groundwater, Part 2 of a Series: Iron and Manganese

No Bull! Examine Your Sires’ Breeding Soundness

Inspiring Rich Conversations through Questions by Sarah Roberts

Become a Community Scientist by Kait Chapman

Hearto f 4-H Volunteer Award: James Blake

4-H Announcements for 4-H'ers and Volunteers

Watch Chicks Hatch on Egg Cam

4-H Achievement Celebration

Extension Calendar

2021 Weed Awareness

Controlling and Managing Phragmites

Take 2, Two …

Utilization And Evaluation Of Treated Wastewater On The Production Technology Of Wheat (Triticum Aestivum L.) Under Different Modes Of Cultivation, Fatima Hasan Al Hamedi

Dissertations

In the recent past, the production of wastewater from domestic and industrial sources has been steadily increasing through the population, urbanization, industrial revolution and economic development. In the world, 80% of wastewater consists of several harmful substances and hazardous chemicals that cause many deadly effects to human beings as well as ecosystems. So, the elimination of this toxic substance before discarding into landfills is utilized as an alternative source of water which is an emerging need. Using the treated wastewater for agricultural purposes is an excellent approach for rendering wastewater beneficial. As the quantity of wastewater grows, there is a …

Date Fruit Fiber Variability In Composition, Tissue Distribution, And Contribution To Hardness Of Date Fruits (Phoenix Dactylifera L.), Navomy George

Dissertations

Date fruit (Phoenix dactylifera L.) is a major desert crop and is an integral part of the United Arab Emirates. This study is on the various aspects of dietary fiber of ten Emirati date varieties. The main objective of this dissertation is to analyze the content and composition of mature date fruits and to study their microstructure. The aspects of biomineralization with particular importance to silica phytoliths and lignification are also studied. Finally, the date fruit dietary composition and microstructure are related to the textural attributes of the fruit. Uppsala method of dietary fiber analysis (AOAC 994.13) is used …

Development And Mechanical Characterization Of A Composite Biomaterial Made From Agricultural Waste Reinforcement In A Fungal Mycelium Matrix., John Adam Howe

Honors Capstones

No abstract provided.

Effectiveness Of Pathogen-Specific Passive Antibodies To Mitigate Infectious Diseases In Apis Mellifera, Tanner Nordseth

Honors Thesis

Honeybees (Apis mellifera) are widely recognized as a vital part of the global ecosystem and the world's food supply due to their pivotal role in the pollination of both natural and agricultural flora. Colony Collapse Disorder (CCD) is an emerging phenomenon characterized by a colony's worker bees deserting the hive and leaving the queen behind. This usually results in colony failure. CCD is a multifactorial issue, with many environmental stressors and pathogens playing a role. Deformed Wing Virus (DWV) has been identified as a leading cause in this phenomenon. Paenibacillus larvae (P. larvae) is another lethal pathogen that is …

Research Report: Figs For Cold Climates 2021, Becky Sideman

UNH Cooperative Extension

This research report describes the methods and results of a project studying winter protection of figs grown in-ground in Durham NH (zone 5B) at the NH Agricultural Experiment Station. Our goal was to investigate the effects of different protection strategies on growth and fruiting patterns for four fig cultivars: Ronde de Bordeaux, Marseilles Black, J.H. Adriatic, and Takoma Violet. Specifically, we explored the effects of rowcover, low tunnels, and/or high tunnels on overwinter survival and subsequent plant growth and fruit set for several fig cultivars. Preliminary conclusions, two years into this project, are the following:

• Fig plants survived winter protection …

Growing South Dakota (Spring 2021), College Of Agriculture, Food And Environmental Sciences

Growing South Dakota (Publication of the College of Agriculture, Food and Environmental Sciences)

This issue contains the 2020 SDSU Extension Annual Report and 2020 South Dakota Agricultural Experiment Station Annual Report.

[Page] 3 COVID-19 Impacts
[Page] 9 Precision Agriculture: What's New
[Page] 13 Featured Research
[Page] 19 SDSU Extension 2020 Annual Report
[Page] 45 South Dakota Agricultural Experiment Station 2020 Annual Report
[Page] 55 CAFES News and Updates
[Page] 67 Alumni News
[Page] 75 Alumni Gone Down in History
[Page] 81 Jackrabbits Now and Then: A Current Student and Alumni Q&A

Changes In Whole Blood Parameters In Beef Heifers May Contribute To Delayed Pubertal Attainment, Jessica A. Keane

Department of Animal Science: Dissertations, Theses, and Student Research

Pubertal development in beef heifers is a transient period that has many contributing factors. Previously in our lab, progesterone (P4) concentrations collected from heifers at weaning (Oct) to breeding (May) were used to identify four distinct pubertal groups: Typical, Early, Start-Stop, and Non-Cycling. There is limited research on heifers and the impacts of whole blood cell populations, particularly WBCs, during pubertal development; however, girls with differing puberty onset displayed altered concentrations of hematocrit, white blood cells (WBC), and hemoglobin concentrations. Thus, our hypothesis was that heifer pubertal groups with delayed or precocious puberty may have increased white blood cells or …

A Study Of The Social, Cultural, And Environmental Influences On Appalachian Agriculture, Morganne May

Senior Theses

Appalachia, despite its rich history and abundant biological and cultural diversity, is commonly associated with a generalized notion of ignorance, resistance to progress, and "backwardness." This study aims to shed light on the socioeconomic, cultural, and environmental influences which have shaped the present food systems of Appalachia through a review of relevant literature. This history provides the necessary context to strategize a region-specific, socioeconomically and environmentally sustainable food system moving forward.

Production And Characterization Of Natural Date Fruit Powder (Pheonix Dactylifera L.), Fayeza Hasan

Theses

The aim of this thesis was to study the possibilities for production and the characterization of powder from ripened date fruits (Phoenix dactylifera L.). Various techniques including tray drying, freeze-drying, vacuum drying, microwave drying, convection drying were tested for their ability to dry the dates sufficiently to produce a dated powder. Six varieties of dates namely Barhi and Khalas (soft varieties), Sagi and Sukari (semi-dry varieties), and Barakawi and Gundeila (dry varieties) were evaluated for their drying characteristics. The drying parameters and the physicochemical characteristics were compared and a storage study for the date powder was conducted. It …

Comparing A Mixed Model Approach To Traditional Stability Estimators For Mapping Genotype By Environment Interactions And Yield Stability In Soybean [Glycine Max (L.) Merr.], Mary M. Happ, George L. Graef, Haichuan Wang, Reka Howard, Luis Posadas, David L. Hyten

Department of Agronomy and Horticulture: Faculty Publications

Identifying genetic loci associated with yield stability has helped plant breeders and geneticists begin to understand the role and influence of genotype by environment (GxE) interactions in soybean [Glycine max (L.) Merr.] productivity, as well as other crops. Quantifying a genotype’s range of performance across testing locations has been developed over decades with dozens of methodologies available. This includes directly modeling GxE interactions as part of an overall model for yield, as well as methods which generate overall yield “stability” values from multi-environment trial data. Correspondence between these methods as it pertains to the outcomes of genome wide association studies …

The Role Of Α-Tocopherol In Mitigating The Effect Of Elevated Co2 Concentrations Emitted From The Al-Hunay Power Plant Main Station On Glycine Max L. Plants, Mohammed Abdulrahman Almuwayhi

The Philippine Agricultural Scientist

Soybean (Glycine max L.), belonging to Leguminosae, is an essential food in Asian countries. It has become a necessity to study the long-term effects of elevated concentrations of CO₂ on plant growth and development. Climate change may be affected by the increment of CO₂ and higher temperatures on crops. Elevated concentrations of atmospheric CO₂ can negatively affect the yield as well as the quality of the field crops. Alpha-tocopherol is the major vitamin E compound found in leaf chloroplasts. This antioxidant deactivates photosynthesis-derived reactive oxygen species and prevents the propagation of lipid peroxidation by scavenging lipid …

Postharvest Salicylic Acid And Melatonin Dipping Delay Ripening And Improve Quality Of ‘Sensation’ Mangoes, Mohamed A. Awad, Adel D. Al-Qurashi

The Philippine Agricultural Scientist

Freshly harvested mature-green ‘Sensation’ mangoes were dipped for 10 min in 2 mM salicylic acid (SA) and 0.2 mM melatonin (MT) alone or in combination and stored at 23±1°C and 60–70%RH. SA or MT delayed ripening measured as higher green peel color (lower a* values), firmness, titratable acidity (TA) and membrane stability index (MSI) and lower weight loss, total soluble solids (TSS), TSS/TA ratio and hydrolytic enzyme activities (polygalacturonase, xylanase and α-amylase) compared to that of untreated fruit. Total phenolic content (TPC) in peel of treated fruit increased with fluctuations during ripening and was higher than the control. In pulp, …

Soil Erosion Modelling: A Bibliometric Analysis, Nejc Bezak, Matjǎz Mikǒs, Pasquale Borrelli, Christine Alewell, Dinesh Panday, Panos Panagos, 59 Co-Authors

Department of Agronomy and Horticulture: Faculty Publications

Soil erosion can present a major threat to agriculture due to loss of soil, nutrients, and organic carbon. Therefore, soil erosion modelling is one of the steps used to plan suitable soil protection measures and detect erosion hotspots. A bibliometric analysis of this topic can reveal research patterns and soil erosion modelling characteristics that can help identify steps needed to enhance the research conducted in this field. Therefore, a detailed bibliometric analysis, including investigation of collaboration networks and citation patterns, should be conducted. The updated version of the Global Applications of Soil Erosion Modelling Tracker (GASEMT) database contains information about …

Development Of An Algorithm For Optimization Of Continuous Technological Process Of Cultivation Of Microorganisms, Sh.R. Rakhmanov

Irrigation and Melioration

In article the analysis of possible modes of microalgae cultivation has been carried out. Two optimization algorithms are substantiated. The first one is based on the method of random search with an absolute bias, an algorithm for optimizing the process of cultivating microorganisms with continuous regeneration of the flow in one cultivator. The second is an algorithm for determining the optimal residence time of chlorella particles in multistage cultivators, focused on the method of dynamic programming, implemented in Wellman's recurrence relation. The developed algorithm for operational forecasting and automatic control of the chlorella cultivation process allows, under given production conditions …

Covid-19 Impact To Family Food Consumption And Income In Uzbekistan: Results Of An Online Survey, Kh. Pardaev, Sh. Hasanov, S. Mamasoliev, Sh. Muratov, R. Kalandarov, U. Nurullaev

Irrigation and Melioration

This article aims to study the impact of the pandemic on food consumption by families in Uzbekistan. The shock of the pandemic is threatening the well-being of families in Uzbekistan, as in all developing countries. The study focuses on the effects of changes in food prices, declining consumption, and changes in household incomes. The Instrumental regression model was used in the factor impact analysis. Data for analysis were collected online by messenger groups from families in urban and rural areas of Uzbekistan. Results of the Econometric analysis demonstrated that the decline in food consumption in households was assessed by a …

Effect Of Low Dose X Ray On Barley Germination And Analysis Of System Dynamics Mechanism, Dong Chen, Wang Wei, Zhang Yi, Zhang Zhi-Yong

Food and Machinery

In this study, barley germination test was carried out in an apparatus that could simulate low-dose X ray environment, and the quality parameters of barley were detected to analyze the relationship between the radiation dose received by barley seeds and the germination process of barley. The study found that the X ray of barley seed germination stage of bud length, root length and biomass to produce inhibition, accept the dose of 1 059.65 μSv/s experimental Ⅰ starch, protein and fat in 3 days delay. which compared with the control group increased 19.8%, 31.6% and 33.3%, respectively and the soluble dietary …

Subcellular Distribution And Risk Assessment Of Aluminum In Seaweed And Tea, Song Zheng, Ma Li-Xia, Peng Qing-Zhi, Huang Hui, Cheng Yin-Qi

Food and Machinery

The subcellular distribution of aluminium in seaweed and tea leaves was analyzed by differential centrifugation with microwave digestion and inductively coupled plasma mass spectrometer. The results showed that the proportion of aluminium in cell wall, organelle and cytoplasm of tea leaves were 78.4%, 11.2% and 9.5%, respectively; the proportion of aluminium in cell wall, organelle and cytoplasm of seaweed were 91.60%, 6.95% and 1.33%, respectively. Using transmission electron microscope with energy dispersive spectroscopy, surface scanning analysis was carried out on the distribution of aluminum in the single cell of tea leaves and seaweed, intuitively revealing that aluminum was mainly distributed …

Research On Simulation Of Flow Field In Press Section Of Screw Press Based On Fluent, Mi Guo-Qiang, Huang Zhi-Gang, Hu Shu-Zhen, An Qi, Li He

Food and Machinery

In order to study the flow field distribution and variation law of the interaction between oil and screw in the chamber of a twin screw press, a physical model of the screw press and the fluid field was established. Fluent is used to solve the finite element simulation. The distributions of pressure field and velocity field and concentration field of oil in the press section were obtained. In the certain scope, the pressure and temperature were higher, and the concentration was higher, which was beneficial to get high oil yield.

Isolation, Identification And Its Biological Activity Analysis Of The Polysaccharide In Passiflora Edulis Sims Leaves From Alkali Extracts, Li Xia, Liu Cheng-Xin, Huang Yan, Mo Guan-Lan, Guan Yuan

Food and Machinery

The residue of Passiflora edulis Sims leaves after hot water extraction was used as material. Polysaccharide was extracted from the residue by using NaOH alkaline solution, followed by separation of ion-exchange chromatography. The physicochemical properties of polysaccharide were determined and analyzed by IR, HPLC and gel permeation chromatography, and then its hypoglycemic and anticoagulant were studied. The results showed that APEL was separated by DEAE-52 cellulose ion-exchange chromatography to obtain the APEL-1, APEL-2, APEL-3, the APEL and its separated components all have typical characteristic peaks of polysaccharides, mainly composed of arabinose, glucose, galactose, xylose, rhamnose, glucuronic acid. The molecular weights …

Preparation Of Citrus Essential Oil Nanoemulsions And Its Antibacterial Activity Against Staphylococcus Aureus, Jiang Shu-Ge, Hou Yu-Hao, Liu Jian, Li Gao-Yang, Fu Fu-Hua, Shan Yang

Food and Machinery

Citrus essential oil, as a natural extract with a broad-spectrum antibacterial effect, can effectively inhibit the growth of food-borne pathogens, but its wide application is limited due to its easy volatilization and poor water solubility. In this study, through the inhibition zone diamater test of three kinds of citrus (bergamot, sweet orange, honey pomelo) essential oilswith good antibacterial effect on Staphylococcus aureus wasusedas the oil phase. Tween 80 was used as the emulsifier, with deionized water used as the water phase, and the nanoemulsions was prepared by phase transformation method. According to the pseudo-ternary phase diagrams, the formulas of three …

Research Progress On Biological Activity And Molecular Mechanism Of Sea Cucumber Saponins, Zhong Jing-Shi, Zhang Jian, Liu Fang, Zhao Yun-Ping, Liu Kui, Wang Yi-Xin, Liu Hai-Chao, Wang Gong-Ming

Food and Machinery

In this review, the bioactivities and mechanisms of sea cucumber saponins, such as anti-tumor, anti-biofouling, atherosclerosis-improving, obesity-improving and obesity-related insulin resistance, Parkinson's disease-improving, osteoporosis-improv-ing and lifespan extension-promoting were summarized. Meanwhile, basic research, commercial application research and in-depth studies of sea cucumber saponins with modern technologies were also prospected.