Student-Conducted Farmer Video Interviews,
2016
University of Nebraska-Lincoln
Student-Conducted Farmer Video Interviews, Jenn K. Simons, Justin Van Wart, Charles Francis, Kristyn Harms
Department of Agronomy and Horticulture: Faculty Publications
High school agricultural education teachers have expressed concern about the lack of easily accessible educational materials dealing with contemporary topics in sustainable agriculture. There are numerous textbooks and monographs available for farmers and students at the college level, including the highly practical resources available from the Sustainable Agriculture Research and Education (SARE) book series on soil fertility (Magdoff and van Es, 2010), cover crops (Bowman et al., 2007) and building a farm business (DiGiacomo et al., 2003), among others. Although these are full of color photos and easily accessible graphs and tables, they are still in the print media category. …
Arkansas Cotton Variety Test 2015,
2016
University of Arkansas, Fayetteville
Arkansas Cotton Variety Test 2015, Fred Bourland, A. Beach, C. Kennedy, L. Martin, A. Rouse, B. Robertson
Arkansas Agricultural Experiment Station Research Series
The primary goal of the Arkansas Cotton Variety Test is to provide unbiased data regarding the agronomic performance of cotton varieties and advanced breeding lines in the major cotton-growing areas of Arkansas. This information helps seed companies establish marketing strategies and assists producers in choosing varieties to plant. These annual evaluations will then facilitate the inclusion of new, improved genetic material in Arkansas cotton production.
Winter Cover Crops Impact On The Distribution Of Soil Inorganic Nitrogen And Subsequent Crop Uptake And Yield Following Fall Applied Anhydrous Ammonium,
2016
Illinois State University
Winter Cover Crops Impact On The Distribution Of Soil Inorganic Nitrogen And Subsequent Crop Uptake And Yield Following Fall Applied Anhydrous Ammonium, William Travis Deppe
Theses and Dissertations
The pairing of cover crops with spring application of nitrogen has shown improved nitrogen efficiency in corn production systems. However, studies have shown that only 50% of central Illinois farmers practice spring application of nitrogen. Furthermore, the literature demonstrates that in years with above average rainfall, fall applied N management systems are more susceptible to N loading relative to spring systems. Therefore, the objective of this research was to determine the efficacy of winter cover crops to impact the distribution of soil inorganic N following fall applied anhydrous ammonium. The experimental site is located at the Illinois State University Research …
Corn Era Hybrid Response To Nitrogen Fertilization,
2016
Iowa State University
Corn Era Hybrid Response To Nitrogen Fertilization, Krishna P. Woli, Matthew J. Boyer, Roger Wesley Elmore, John E. Sawyer, Lori J. Abendroth, Daniel W. Barker
Department of Agronomy and Horticulture: Faculty Publications
Corn (Zea mays L.) N use is of continued interest due to agronomic performance and environmental issues. This 2-yr study evaluated era hybrid response to fertilizer nitrogen (FN) rate in a factorial arrangement of one popular hybrid per five decades (1960–2000 eras) and five N rates (0–224 kg N ha–1). An additional hybrid per era was grown at 168 kg N ha–1. Hybrid productivity and nitrogen use efficiency (NUE) increased across the eras, but not between the 1980 and 1990 eras. Grain yield (GY) increased 65% and total plant biomass 43%, however, total plant nitrogen …
Igrow Corn: Best Management Practices,
2016
South Dakota State University
Igrow Corn: Best Management Practices, David E. Clay, Gregg G. Carlson, Sharon A. Clay, Emmanuel Byamukama
Agronomy, Horticulture, and Plant Science Books
No abstract provided.
Image Harvest: An Open-Source Platform For High-Throughput
Plant Image Processing And Analysis,
2016
University of Nebraska-Lincoln
Image Harvest: An Open-Source Platform For High-Throughput Plant Image Processing And Analysis, Avi C. Knecht, Malachy T. Campbell, Adam Caprez, David R. Swanson, Harkamal Walia
Holland Computing Center: Faculty Publications
High-throughput plant phenotyping is an effective approach to bridge the genotype-to-phenotype gap in crops. Phenomics experiments typically result in large-scale image datasets, which are not amenable for processing on desktop computers, thus creating a bottleneck in the image-analysis pipeline. Here, we present an open-source, flexible image-analysis framework, called Image Harvest (IH), for processing images originating from high-throughput plant phenotyping platforms. Image Harvest is developed to perform parallel processing on computing grids and provides an integrated feature for metadata extraction from large-scale file organization. Moreover, the integration of IH with the Open Science Grid provides academic researchers with the computational resources …
Growing Potato Profitably For Organic Dry Matter Production In Western Nebraska,
2016
University of Nebraska-Lincoln
Growing Potato Profitably For Organic Dry Matter Production In Western Nebraska, Alexander Pavlista, Jessica J. Groskopf
Panhandle Research and Extension Center
Growing potato conventionally for dehydration is not economically feasible. The key cost would be seed under organic farming. The objective is to identify seed-piece sizes and spacings producing a profitable return for potato dehydration in western Nebraska. Atlantic potatoes were grown under dryland conditions using organic practices. Rain was 205, 270, and 360 mm in 2013, 2014, and 2015. Seed-pieces were hand-cut into five weights from 42.5 to 85.0 g and planted in five spacings from 15.2 to 45.7 cm. Seeding rates were 1.02 to 6.1 Mg/ha. Yield was highest at the spacing of 15.2 cm (16.1 Mg/ha) and decreased …
Biochar Reduced Nitrous Oxide And Carbon Dioxide Emissions From Soil With Different Water And Temperature Cycles,
2016
South Dakota State University
Biochar Reduced Nitrous Oxide And Carbon Dioxide Emissions From Soil With Different Water And Temperature Cycles, Jiyul Chang, David E. Clay, Sharon A. Clay, Rajesh Chintala, Janet M. Miller, Thomas Schumacher
Agronomy, Horticulture and Plant Science Faculty Publications
Interactions among biochar, respiration, nitrification, and soils can result in biochar increasing, decreasing, or not impacting greenhouse gas (GHG) emissions. This experiment determined the impact of water-filled porosity (WFP) and corn (Zea mays L.) stover biochar on CO2 and N2O emissions in May (spring) and August (summer). The May experiment contained two N rates [0 and 224 kg Ca(NO3)2–N ha–1], whereas the August had three N rates [0, 224 kg Ca(NO3)2–N ha–1, and 224 kg (NH4)2SO4–N ha–1 …
Simulating Long-Term Impacts Of Cover Crops And Climate Change On
Crop Production And Environmental Outcomes In The Midwestern
United States,
2016
Iowa State University
Simulating Long-Term Impacts Of Cover Crops And Climate Change On Crop Production And Environmental Outcomes In The Midwestern United States, Andrea D. Basche, Sotririos V. Archontoulis, Thomas C. Kaspar, Dan B. Jaynes, Timothy B. Parkin, Fernando E. Miguez
Department of Agronomy and Horticulture: Faculty Publications
It is critical to evaluate conservation practices that protect soil and water resources from climate change in the Midwestern United States, a region that produces one-quarter of the world’s soybeans and one-third of the world’s maize. An over-winter cover crop in a maize–soybean rotation offers multiple potential benefits that can reduce the impacts of higher temperatures and more variable rainfall; some of the anticipated changes for the Midwest. In this experiment we used the Agricultural Production Systems sIMulator (APSIM) to understand how winter rye cover crops impact crop production and environmental outcomes, given future climate change. We first tested APSIM …
Decipher The Molecular Response Of Plant Single Cell
Types To Environmental Stresses,
2016
University of Oklahoma
Decipher The Molecular Response Of Plant Single Cell Types To Environmental Stresses, Mehrnoush Nourbakhsh-Rey, Marc Libault
Department of Agronomy and Horticulture: Faculty Publications
The analysis of the molecular response of entire plants or organs to environmental stresses suffers from the cellular complexity of the samples used. Specifically, this cellular complexity masks cell-specific responses to environmental stresses and logically leads to the dilution of the molecular changes occurring in each cell type composing the tissue/organ/plant in response to the stress.Therefore, to generate a more accurate picture of these responses, scientists are focusing on plant single cell type approaches. Several cell types are now considered as models such as the pollen, the trichomes, the cotton fiber, various root cell types including the root hair cell, …
Draft Genome Sequence Of Erwinia Tracheiphila, An Economically
Important Bacterial Pathogen Of Cucurbits,
2016
Harvard University
Draft Genome Sequence Of Erwinia Tracheiphila, An Economically Important Bacterial Pathogen Of Cucurbits, Lori R. Shapiro, Erin D. Scully, Dana Roberts, Timothy J. Straub, Scott M. Geib, Jihye Park, Andrew G. Stephenson, Erika Salaau Rojas, Quin Liu, Gwyn Beattie, Mark Gleason, Consuelo M. De Moraes, Mark C. Mescher, Shelby G. Fleischer, Roberto Kolter, Naomi Pierce, Olga Zhaxybayeva
Department of Agronomy and Horticulture: Faculty Publications
Erwinia tracheiphila is one of the most economically important pathogens of cucumbers, melons, squashes, pumpkins, and gourds in the northeastern and midwestern United States, yet its molecular pathology remains uninvestigated. Here, we report the first draft genome sequence of an E. tracheiphila strain isolated from an infected wild gourd (Cucurbita pepo subsp. texana) plant. The genome assembly consists of 7 contigs and includes a putative plasmid and at least 20 phage and prophage elements.
Correlating Bulk Density (With Dockage) And Test Weight (Without Dockage) For Wheat Samples,
2016
Kansas State University
Correlating Bulk Density (With Dockage) And Test Weight (Without Dockage) For Wheat Samples, Rumela Bhadra, Mark E. Casada, Josephine M. Boac, Aaron P. Turner, Sidney A. Thompson, Michael D. Montross, Ronaldo G. Maghirang, Samuel G. Mcneill
Biosystems and Agricultural Engineering Faculty Publications
In grain bins, the compaction of stored grain is caused by the overbearing pressure of the bulk material in the bin. To predict the amount of grain in the bin, compaction values must be determined based on the average bulk density (BD) of the stored material. However, BD is determined following the Federal Grain Inspection Service (FGIS) guidelines for measuring test weight (TW), which require that dockage be removed prior to measuring wheat TW. Thus, this creates a problem for predicting grain compaction and conducting inventory studies, because the average BD of the grain in a bin for these calculations …
Bumpers College Students In Action,
2016
University of Arkansas, Fayetteville
Bumpers College Students In Action, Discovery Editors
Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences
No abstract provided.
Soil Salinity Study In Northern Great Plains Sodium Affected Soil,
2016
South Dakota State University
Soil Salinity Study In Northern Great Plains Sodium Affected Soil, Tulsi P. Kharel
Electronic Theses and Dissertations
Climate and land-use changes when combined with the marine sediments that underlay portions of the Northern Great Plains have increased the salinization and sodification risks. The objectives of this dissertation were to compare three chemical amendments (calcium chloride, sulfuric acid and gypsum) remediation strategies on water permeability and sodium (Na) transport in undisturbed soil columns and to develop a remote sensing technique to characterize salinization in South Dakota soils. Fortyeight undisturbed soil columns (30 cm x 15 cm) collected from White Lake, Redfield, and Pierpont were used to assess the chemical remediation strategies. In this study the experimental design was …
Restoration Of Eroded Lands With Biochar As Soil Amendment In South Dakota,
2016
South Dakota State University
Restoration Of Eroded Lands With Biochar As Soil Amendment In South Dakota, Saroop S. Sandhu
Electronic Theses and Dissertations
Biochar is produced from incomplete pyrolysis of plant biomass. Due to the unique properties of biochar such as a higher number of micropores, surface area and carbon content, and recalcitrant nature of carbon, biochar is hypothesized to improve physical and hydrological properties of soil. This study assesses the impact of biochar on soil organic carbon, physical and hydrological properties of two landscape positions under a corn (Zea mays L.)-soybean (Glycine max L.) rotation. Three types of biochar including corn stover, ponderosa pine (Pinus ponderosa Lawson and C. Lawson) wood residue, and switchgrass (Panicum virgatum L.) were applied in the field …
Evaluation Of Hazelnuts As A Sustainable Crop In Illinois,
2016
Eastern Illinois University
Evaluation Of Hazelnuts As A Sustainable Crop In Illinois, Sharon Neva Dubosky
Masters Theses
Production of hazelnuts has historically been limited to regions with mild climates, with almost all hazelnut production in the United States occurring in Oregon. A recent boom in demand, along with an expanded selection of varieties with improved environmental tolerances, has pushed hazelnut production into new regions. Hazelnut production could prove profitable in areas of the Midwest that are less well-suited to the cultivation of maize and soybeans. However, the lack of varieties proven to thrive in the climatological conditions of this region (cold winters, hot summers, frequent drought) presents a barrier to the viability of hazelnut production. A trial …
Distribution And Characterization Of The Soybean Cyst Nematode, Heterodera Glycines (Hg) Types In South Dakota,
2016
South Dakota State University
Distribution And Characterization Of The Soybean Cyst Nematode, Heterodera Glycines (Hg) Types In South Dakota, Krishna Acharya
Electronic Theses and Dissertations
The soybean cyst nematode (SCN), Heterodera glycines Ichinohe, is an endoparasitic nematode and one of the major pests of soybean (Glycine max L.) in the United State and all over the world where soybean is grown. SCN is ranked first among the biological factors that cause yield loss in soybean. The estimated yield loss by this nematode is $1b annually in the United States alone. SCN is thought to have been first found in China. It was first identified in the United States in 1954 in North Carolina and in South Dakota in 1995. To date, SCN continues to spread …
Effects Of Corn (Zea Mays L.) Stover Removal And Leaching On Soil Test And Whole Plant K Levels In Corn And K Fertilization/High-Input Treatments On Soybean Using Site-Specific Management To Increase Soybean (Glycine Max) Production In South Dakota,
2016
South Dakota State University
Effects Of Corn (Zea Mays L.) Stover Removal And Leaching On Soil Test And Whole Plant K Levels In Corn And K Fertilization/High-Input Treatments On Soybean Using Site-Specific Management To Increase Soybean (Glycine Max) Production In South Dakota, Nick J. Schiltz
Electronic Theses and Dissertations
Potassium is important for crop production. Corn stover removal has the potential to reduce exchangeable and soluble soil potassium (K+) needed for optimal plant growth in addition to grain yield. An experiment was conducted in Aurora, SD, USA, to observe the effects of corn stover removal on water soluble and exchangeable soil test K+ (STK) levels and corn grain yields across a five-year period. Abundant K+ reserves were recorded between the initial and final sampling periods. While corn grain yields were affected by removing corn biomass, exchangeable and solution K+ levels were relatively unaffected by stover removal. Potassium fertilizer has …
Aspergillus And Aflatoxin In Groundnut (Arachis Hypogaea L.) And Groundnut Cake In Eastern Ethiopia,
2016
Haramaya University
Aspergillus And Aflatoxin In Groundnut (Arachis Hypogaea L.) And Groundnut Cake In Eastern Ethiopia, Abdi Mohammed, Alemayehu Chala, Mashilla Dejene, Chemeda Fininsa, David A. Hoisington, Victor S. Sobolev, R. S. Arias
United States Department of Agriculture-Agricultural Research Service / University of Nebraska-Lincoln: Faculty Publications
This study was conducted to assess major Aspergillus species and aflatoxins associated with groundnut seeds and cake in Eastern Ethiopia and evaluate growers’ management practices. A total of 160 groundnut seed samples from farmers’ stores and 50 groundnut cake samples from cafe and restaurants were collected. Fungal isolation was done from groundnut seed samples. Aspergillus flavus was the dominant species followed by Aspergillus parasiticus. Aflatoxin analyses of groundnut seed samples were performed using ultra performance liquid chromatography; 22.5% and 41.3% of samples were positive, with total aflatoxin concentrations of 786 and 3135 ng g−1 from 2013/2014 and 2014/2015 …
Genome-Wide Discriminatory Information Patterns Of Cytosine Dna Methylation,
2016
University of Nebraska-Lincoln
Genome-Wide Discriminatory Information Patterns Of Cytosine Dna Methylation, Robersy Sanchez, Sally A. Mackenzie
Department of Agronomy and Horticulture: Faculty Publications
Cytosine DNA methylation (CDM) is a highly abundant, heritable but reversible chemical modification to the genome. Herein, a machine learning approach was applied to analyze the accumulation of epigenetic marks in methylomes of 152 ecotypes and 85 silencing mutants of Arabidopsis thaliana. In an information-thermodynamics framework, two measurements were used: (1) the amount of information gained/lost with the CDM changes IR and (2) the uncertainty of not observing a SNP LCR. We hypothesize that epigenetic marks are chromosomal footprints accounting for different ontogenetic and phylogenetic histories of individual populations. A machine learning approach is proposed to …
