Agriculture Commons^™

A Multi-Criteria And Dynamic Sustainability Assessment Of Crop Rotation Alternatives, Saturnina Fabian Nisperos

Computational Modeling & Simulation Engineering Theses & Dissertations

With the food security challenge faced by nations globally, agriculture sustainability has been a significant consideration for concerned agencies. Sustainability assessments are significant tools in providing support to stakeholders in their crop production planning. Agricultural sustainability assessment, however, is complex and it involves numerous criteria that can be conflicting. Limitations on crop rotation sustainability assessment methods include: non-dynamic assessment; lack of regard to cover crops and to the individual crop production preferences of farmers; and focused only on single-year and single-crop rotation. We sought to address these limitations by developing a multi-criteria and dynamic sustainability assessment model that considers the …

2018 Weed Science Research Report – Blue Section, Ndsu Weed Science, Dept. Of Plant Sciences

Plant Sciences Weed Science Reports

The Weed Science team at North Dakota State University conduct field research in the State of North Dakota. This specific document reports on field research conducted in 2018. It includes work on corn, soybean and the management of several weeds in North Dakota.

2018 Weed Science Research Report – Gold Section, Ndsu Weed Science, Dept. Of Plant Sciences

Plant Sciences Weed Science Reports

The Weed Science team at North Dakota State University conduct field research in the State of North Dakota. This specific document reports on field research conducted in 2018. It includes work on sugarbeet and the management of several weeds in North Dakota.

2018 Weed Science Research Report – Green Section, Ndsu Weed Science, Dept. Of Plant Sciences

Plant Sciences Weed Science Reports

The Weed Science team at North Dakota State University conduct field research in the State of North Dakota. This specific document reports on field research conducted in 2018. It includes work on small grains and the management of several weeds in North Dakota.

2018 Weed Science Research Report - Tan Section, Ndsu Weed Science, Dept. Of Plant Sciences

Plant Sciences Weed Science Reports

The Weed Science team at North Dakota State University conduct field research in the State of North Dakota. This specific document reports on field research conducted in 2018. It includes work on adjuvants and the management of several weeds in North Dakota.

"Squeezed Between The Gunshots And The Gentrifiers”: Urban Agriculture In Philadelphia's Kensington Neighborhood, Arianna Hall-Reinhard

Graduate Theses, Dissertations, and Problem Reports (ETD)

Urban agriculture (UA) is part of the broader alternative food movement and a potential avenue through which to “do” food justice work. UA projects in the urban Global North are frequently motivated by social and food justice goals. Despite these guiding ideals, UA projects in America are rife with internal contradictions, including those related to racial inequalities, complex gentrification dynamics, and funding realities. In this paper, I employ the conceptual frameworks of food justice and urban political ecology to consider how gentrification and UA project funding structures affect five specific UA projects in Philadelphia’s Kensington neighborhood. While the loss of …

Eastern Wheatbelt Biosecurity Group Inc. Annual Report 2017/18, Eastern Wheatbelt Biosecurity Group Inc.

Recognised Biosecurity Group Annual Reports

Well another year down and a job well done by the Eastern Wheatbelt Biosecurity Group. List of achievements for the year, after lots of persistence we finally have the Koolyanobbing Grid back in place, we have held seven pest workshops throughout our area, over seventy Restricted Chemical Product (RCP) Permits approved and paid for by the EWBG and we have attended multiple field days and industry events. The group has had the wings extended on the Minjar Marvel Loch Gold Mine haul road and are working with DPIRD and the Minjar Gold Mine to have a grid in place soon, …

Goldfields Nullarbor Rangelands Biosecurity Association Inc. Annual Report 2017/18, Goldfields Nullarbor Rangelands Biosecurity Association Inc.

Recognised Biosecurity Group Annual Reports

The Goldfields Nullarbor Rangelands Biosecurity Association Inc. (GNRBA) is unique in rangeland management across Western Australia. It has a huge area to service and is working hard to provide a top class service to ratepayers. It is now well recognised as being a leader in the RBG’s in WA.

Kimberley Rangelands Biosecurity Association Invasive Species Activity Report 2017/18, Kimberley Rangelands Biosecurity Association

Recognised Biosecurity Group Annual Reports

The Kimberley Rangelands Biosecurity Association (KRBA) has an annual Large Feral Herbivore culling program that includes feral donkeys, horses and camels with other animals such as water buffalo and pigs targeted when located. The program focusses primarily on donkeys, using the radio telemetry technique with horses and camels culled opportunistically during tracking. Currently there are 135 active collars throughout the region.

Meekatharra Rangelands Biosecurity Association Inc. Annual Report 2017/18, Meekatharra Rangelands Biosecurity Association Inc.

Recognised Biosecurity Group Annual Reports

The Meekatharra Rangelands Biosecurity Association Inc (MRBA) is an industry body with a membership of all pastoralists in the Shires of Yalgoo, Mount Magnet, Cue and Meekatharra. The Association has been established under the Biosecurity and Agriculture Management Act 2007 with a charter to manage and control declared pests, both animal and plant.

Pilbara Regional Biosecurity Group Inc. Annual Report 2017/18, Pilbara Regional Biosecurity Group Inc.

Recognised Biosecurity Group Annual Reports

The Pilbara RBG is a not for profit association formed under the Associations Incorporation Act 2015, providing declared pest control programs for land managers, particularly in the pastoral zone. The associations’ primary purpose is the control of declared pests using funding from Declared Pest Rates paid by landholders on pastoral stations. These Declared Pest Rates funds are matched dollar for dollar by the WA Government to reflect the public benefit of controlling declared pest animals and weeds. The association is formally recognised by the Hon Minister for Agriculture and Food as a recognised biosecurity group (RBG).

Resistance In Rice To Tibraca Limbativentris (Hemiptera: Pentatomidae) Influenced By Plant Silicon Content, Lincoln Luis França, Cássio Antonio Dierings, André Cirilo De Sousa Almeida, Marcio Da Silva Araújo, Elvis Arden Heinrichs, Anderson Rodrigo Da Silva, José Alexandre Freitas Barrigossi, Flávio Gonçalves De Jesus

Department of Entomology: Faculty Publications

Tibraca limbativentris Stål (Hemiptera: Pentatomidae) is a major pest causing economic losses to rice cultivation in Brazil. The objectives of this work were to assess different sources of silicon in the induction of plant resistance, to examine the interaction of rice varieties with silicon-based resistance, and to determine the effects of varieties and silicon on stink bug biology. The interaction of rice cultivars BRS Esmeralda, IRGA 429 (widely cultivated in Brazil), and Canela de Ferro (a resistant cultivar), and 2 sources of silicon (K silicate, and Ca + Mg silicate) were studied. Plant parameters measured were percentage of damaged stems, …

Crop Residue Harvest Impacts Wind Erodibility And Simulated Soil Loss In The Central Great Plains, Yuxin He, Deann R. Presley, John Tatarko, Humberto Blanco-Canqui

Department of Agronomy and Horticulture: Faculty Publications

Crop residue removal can affect the susceptibility to soil wind erosion in climates such as those of the Central Great Plains, United States. Six on-farm trials were conducted in Kansas from 2011 to 2013 to determine the effects of winter wheat (Triticum aestivum L.), corn (Zea mays L.), and grain sorghum (Sorghum bicolor (L.) Moench), residue removal at 0, 25, 50, 75, and 100% of initial height on soil wind erosion parameters. Those parameters include soil surface random roughness (RR), and wind erodible fraction (EF; aggregates -¹ for three hours. Threshold wind velocity required to initiate …

Genetic Diversity And Population Structure Of F3:6 Nebraska Winter Wheat Genotypes Using Genotyping-By-Sequencing, Shamseldeen Eltaher, Ahmed Sallam, Vikas Belamkar, Hamdy A. Emara, Ahmed A. Nower, Khaled F. M. Salem, Jesse Poland, Peter S. Baenziger

Department of Agronomy and Horticulture: Faculty Publications

The availability of information on the genetic diversity and population structure in wheat (Triticum aestivum L.) breeding lines will help wheat breeders to better use their genetic resources and manage genetic variation in their breeding program. The recent advances in sequencing technology provide the opportunity to identify tens or hundreds of thousands of single nucleotide polymorphism (SNPs) in large genome species (e.g., wheat). These SNPs can be utilized for understanding genetic diversity and performing genome wide association studies (GWAS) for complex traits. In this study, the genetic diversity and population structure were investigated in a set of 230 genotypes …

An Efficient And Improved Method For Virus-Induced Gene Silencing In Sorghum, Dharmendra Kumar Singh, Hee-Kyung Lee, Ismail M. Dweikat, Kirankumar S. Mysore

Department of Agronomy and Horticulture: Faculty Publications

Background: Although the draft genome of sorghum is available, the understanding of gene function is limited due to the lack of extensive mutant resources. Virus-induced gene silencing (VIGS) is an alternative to mutant resources to study gene function. This study reports an improved and efficient method for Brome mosaic virus (BMV)-based VIGS in sorghum.

Methods: Sorghum plants were rub-inoculated with sap prepared by grinding 2 g of infected Nicotiana benthamiana leaf in 1 ml 10 mM potassium phosphate buffer (pH 6.8) and 100 mg of carborundum abrasive. The sap was rubbed on two to three top leaves of sorghum. Inoculated …

Can Bangladesh Produce Enough Cereals To Meet Future Demand?, J. Timsina, J. Wolf, N. Guilpart, L G. J. Van Bussel, P. Grassini, J. Van Wart, A. Hossain, H. Rashid, S. Islam, M. K. Van Ittersum

Department of Agronomy and Horticulture: Faculty Publications

Bangladesh faces huge challenges in achieving food security due to its high population, diet changes, and limited room for expanding cropland and cropping intensity. The objective of this study is to assess the degree to which Bangladesh can be self-sufficient in terms of domestic maize, rice and wheat production by the years 2030 and 2050 by closing the existing gap (Yg) between yield potential (Yp) and actual farm yield (Ya), accounting for possible changes in cropland area. Yield potential and yield gaps were calculated for the three crops using well-validated crop models and site-specific weather,management and soil data, and upscaled …

Parallel Altitudinal Clines Reveal Trends In Adaptive Evolution Of Genome Size In Zea Mays, Paul Bilinski, Patrice S. Albert, Jeremy J. Berg, James A. Birchler, Mark N. Grote, Anne Lorant, Juvenal Quezada, Kelly Swarts, Jinliang Yang, Jeffrey Ross-Ibarra

Department of Agronomy and Horticulture: Faculty Publications

While the vast majority of genome size variation in plants is due to differences in repetitive sequence, we know little about how selection acts on repeat content in natural populations. Here we investigate parallel changes in intraspecific genome size and repeat content of domesticated maize (Zea mays) landraces and their wild relative teosinte across altitudinal gradients in Mesoamerica and South America. We combine genotyping, low coverage whole-genome sequence data, and flow cytometry to test for evidence of selection on genome size and individual repeat abundance. We find that population structure alone cannot explain the observed variation, implying that …

Genomic Prediction Accuracy For Switchgrass Traits Related To Bioenergy Within Differentiated Populations, Jason D. Fiedler, Christina Lanzatella, Serge J. Edme, Nathan A. Palmer, Gautam Sarath, Rob Mitchell, Christian M. Tobias

Department of Agronomy and Horticulture: Faculty Publications

Background: Switchgrass breeders need to improve the rates of genetic gain in many bioenergy-related traits in order to create improved cultivars that are higher yielding and have optimal biomass composition. One way to achieve this is through genomic selection. However, the heritability of traits needs to be determined as well as the accuracy of prediction in order to determine if efficient selection is possible.

Results: Using five distinct switchgrass populations comprised of three lowland, one upland and one hybrid accession, the accuracy of genomic predictions under different cross-validation strategies and prediction methods was investigated. Individual genotypes were collected using GBS …

Method For The Production Of High Saturated, Low Polyunsaturated Soybean Oil, Thomas E. Clemente, Hyunwoo Park, Edgar B. Cahoon, Hanh Nguyen

Department of Agronomy and Horticulture: Faculty Publications

Methods of genetically modifying soybean plants to alter the fatty acid properties of the oil are described.

Establishing Growing Degree Day Estimates To Predict Critical Growth Stages In Soft Red Winter Wheat, Ethan J. Snyder

Theses and Dissertations--Plant and Soil Sciences

Predicting developmental growth stages in soft red winter wheat (Triticum aestivum L.) (SRWW) could improve agronomic management in Kentucky. However, predicting SRWW development is complex due to vernalization requirement and photoperiod sensitivity differences of cultivars. The objectives of this study are to (1) determine ability of Kompetitive Allele Specific PCR (KASP) genotyping to predict phenotype; (2) determine the relative vernalization requirement (RVR) of 50 SRWW cultivars in a greenhouse (GH) assay; and (3) measure growing degree-days (GDD) required by cultivars to reach eight growth stages in a field assay. Fifty SRWW cultivars were characterized with 14 KASP markers for …

Bacterial Inoculants, Endophytic Bacteria And Their Influence On Nicotiana Physiology, Development And Microbiome, Andrea Marisa Sanchez Barrios

Theses and Dissertations--Plant and Soil Sciences

Soil and root microbial communities have been studied for decades, and the incorporation of high-throughput techniques and analysis has allowed the identification of endophytic/non-culturable organisms. This has helped characterize and establish the core microbiome of many model plant species which include underground and aboveground organs. Unfortunately, the information obtained from some of these model plants is not always transferable to other agronomic species. In this project, we decided to study the microbiome of the Nicotiana genus because of its importance in plant physiological and plant-microbe interactions studies. The data obtained was used as baseline information that allowed us to better …

Chemical Topping Burley Tobacco, Mitchell D. Richmond

Theses and Dissertations--Plant and Soil Sciences

The act of topping tobacco (Nicotiana tabacum L.) involves the removal of the terminal bud or inflorescence of the tobacco plant. This practice ordinarily is accomplished by manually removing the top of each tobacco plant in an entire field which is labor intensive and costly. Chemical topping utilizes sucker control products to inhibit the terminal bud and axillary bud growth without manually removing the top of the tobacco plant. There were several research objectives in order to determine the utility of a chemical topping system: 1) determine if burley tobacco could be chemically topped with currently registered suckercide products …

Can Increasing Grass-Fungal Endophyte Symbiotic Diversity Enhance Grassland Ecosystem Functioning?, Mahtaab Bagherzadeh

Theses and Dissertations--Plant and Soil Sciences

The relationship between biodiversity and ecosystem functioning is important in maintaining agroecosystem sustainability. Plant-microbe symbioses, such as exists between the grass tall fescue (Schedonorus arundinaceum) and the asexual fungal endophyte Epichloë coenophiala, can be utilized to enhance agroecosystem functions, such as herbivore resistance. “Novel” E. coenophiala strains that vary in the production of mammal- and insect-toxic compounds have been identified, inserted into tall fescue cultivars, and are planted in pastures globally. Novel fungal endophyte-tall fescue associations may have divergent ecosystem function effects. This study assessed effects of different fescue-endophyte symbiotic combinations on pasture ecosystem function, including aboveground …

Engineering Zinc Oxide Nanoparticles To Be Used As Nanofertilizers, Zeinah Elhaj Baddar

Theses and Dissertations--Plant and Soil Sciences

Zinc deficient soils, or soils with low Zn bioavailability, are widespread, which exacerbates Zn deficiency in human as crops grown on these soils have low Zn content. Often crop yields are also compromised. Fertilizers based on soluble Zn salts often have limited efficacy in such soils. In this research, we evaluate the performance of polymer coated and bare ZnO nanoparticles (NPs) in an attempt to overcome limitations of soluble Zn salts in alkaline soils. We first synthesized 20-30 nm bare ZnO NPs with different surface chemistries to impart colloidal stability to the particles. Bare ZnO were treated in phosphate solution …

Characterizing Nitrogen Loss And Greenhouse Gas Flux Across An Intensification Gradient In Diversified Vegetable Systems, Debendra Shrestha

Theses and Dissertations--Plant and Soil Sciences

The area of vegetable production is growing rapidly world-wide, as are efforts to increase production on existing lands in these labor- and input-intensive systems. Yet information on nutrient losses, greenhouse gas emissions, and input efficiency is lacking. Sustainable intensification of these systems requires knowing how to optimize nutrient and water inputs to improve yields while minimizing negative environmental consequences. This work characterizes soil nitrogen (N) dynamics, nitrate (NO₃¯) leaching, greenhouse gas emissions, and crop yield in five diversified vegetable systems spanning a gradient of intensification that is characterized by inputs, tillage and rotational fallow periods. The study systems …

A Mycobacterium Avium Subsp. Paratuberculosis Rela Deletion Mutant And A 35 Kda Major Membrane Protein Elicit Development Of Cytotoxic T Lymphocytes With Ability To Kill Intracellular Bacteria, Gaber S. Abdellrazeq, Mahmoud M. Elnaggar, J. P. Bannantine, Kun Park, Cleverson D. Souza, Brian Backer, Victoria Hulubei, Lindsay M. Fry, Samy A. Khaliel, Helmy A. Torky, David A. Schneider, William C. Davis

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

Efforts to develop live attenuated vaccines against Mycobacterium avium subspecies paratuberculosis (Map), using indirect methods to screen Map deletion mutants for potential efficacy, have not been successful. A reduction in the capacity to survive in macrophages has not predicted the ability of mutants to survive in vivo. Previous studies for screening of three deletion mutants in cattle and goats revealed one mutant, with a deletion in relA (ΔMap/relA), could not establish a persistent infection. Further studies, using antigen presenting cells (APC), blood dendritic cells and monocyte derived DC, pulsed with ΔMap/relA or a 35 kDa Map membrane protein (MMP) revealed …

Agri 115: Biotechnology – Food, Health And Environment, A Peer Review Of Teaching Project Benchmark Portfolio, Leah Sandall

UNL Faculty Course Portfolios

No abstract provided.

Aecn 141- Introduction To The Economics Of Agriculture, Timothy Meyer

UNL Faculty Course Portfolios

Course portfolio for AECN 141- Introduction to the Economics of Agriculture, University of Nebraska-Lincoln.

Arthropod Diets In Chihuahuan Desert Snakes, Victor Manuel Parga

Open Access Theses & Dissertations

Over the past century, studies in herpetology regarding snake diets have been commonly focused on those species that feed or specialize in vertebrate prey items. For those that feed primarily on invertebrates however, little work has been done in determining diet specializations and comparing diets within a community of species. This Thesis focuses on small species of snakes that feed primarily on arthropods in a Chihuahuan Desert community, and will investigate if these are diet generalists or specialists. To this end, stomach contents were examined from preserved specimens of the following species: Rena humilis and Rena dissecta (Leptotyphlopidae), Gyalopion canum …

Growing South Dakota (Winter 2018), College Of Agriculture &. Biological Sciences

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

[Page] 2 Learn About Our Leaders
[Page] 4 Academic Programs at a Glace
[Page] 6 New Precision Ag Major Takes Off
[Page] 9 Raven Gives $5 Million Gift
[Page] 10 New Plant Science Research Facility
[Page] 13 Technical Training to Four-Year Degree
[Page] 15 Ag-Bio Career Fair Hits Record
[Page] 16 Breaking Ground : SD ADRDL
[Page] 19 Distinguished Professor Eric Nelson
[Page] 20 SDSU’s Veterinary Students
[Page] 24 Conservation Planning and Park Management
[Page] 25 Natural Resource Law Enforcement
[Page] 26 Medical Stethoscope Ceremony
[Page] 29 Master’s Degree in Human Biology
[Page] 30 Scott Pedersen Prepares Students
[Page] 32 …