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- Department of Agronomy and Horticulture: Faculty Publications (22)
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Articles 1 - 30 of 72
Full-Text Articles in Agronomy and Crop Sciences
Nitrous Oxide Emissions From Smooth Bromegrass Pasture Under Nitrogen Fertilizer And Ruminant Urine Application In Eastern Nebraska, Laura K. Snell
Nitrous Oxide Emissions From Smooth Bromegrass Pasture Under Nitrogen Fertilizer And Ruminant Urine Application In Eastern Nebraska, Laura K. Snell
Department of Agronomy and Horticulture: Dissertations, Theses, and Student Research
Nitrous oxide (N2O) is a greenhouse gas primarily produced in soils by denitrifying and nitrifying organisms. Agricultural soils account for 70% of emissions in the United States, but little data is available for contributions from managed pasture ecosystems. This study focused on the production of N2O in smooth bromegrass (Bromus inermis Leyss.) pastures established on silt loam soils in eastern Nebraska. Thirty smooth bromegrass plots (1.5m x 1.5m) were treated with five different fertilizer treatments (0, 45, 90, 135, and 180 kg N/ha) and two urine treatments (urine and no urine). Herbage sampling was taken …
Arkansas Soybean Performance Tests 2012, R. D. Bond, D. G. Dombek, J. A. Still, R. M. Pryor
Arkansas Soybean Performance Tests 2012, R. D. Bond, D. G. Dombek, J. A. Still, R. M. Pryor
Arkansas Agricultural Experiment Station Research Series
Soybean variety and strain performance tests are conducted each year in Arkansas by the University of Arkansas System Division of Agriculture Arkansas Crop Variety Improvement Program. The tests provide information to companies developing varieties and/or marketing seed within the state, and aid the Arkansas Cooperative Extension Service in formulating variety recommendations for soybean producers.
A Review Of Cover Crops For Eastern Nebraska, Tyler Williams
A Review Of Cover Crops For Eastern Nebraska, Tyler Williams
Department of Agronomy and Horticulture: Dissertations, Theses, and Student Research
The focus of this project is two fold, first to provide a short literature review of cover crops (CC) and then discuss the results from a field experiment that was designed to evaluate the nitrogen contribution from cover crop mixes to the subsequent corn crop. The literature review will focus on the aspects of CC that are related to the field of study. Cover crops, as defined by the United States Department of Agriculture (USDA) are crops that are agronomically sound and grown for the purpose of erosion control or other objectives related to conservation or soil improvement. Cover crops …
Ecology And Invasive Properties Of Musk Thistle (Carduus Nutans) In The Central Prairies Of Nebraska, Chengchou Han
Ecology And Invasive Properties Of Musk Thistle (Carduus Nutans) In The Central Prairies Of Nebraska, Chengchou Han
Department of Agronomy and Horticulture: Dissertations, Theses, and Student Research
Musk thistle (Carduus nutans) is an herbaceous monocarpic herb introduced to the U. S. from Eurasia. The invasion of musk thistle can reduce forage area, soil stability, and reduce recreation and open areas for humans and wildlife.
Resistance of warm season and cool season perennial grass communities to musk thistle invasion is important for land managers to consider, especially where disturbance has made an area particularly susceptible. Our results show that disturbances, such as overgrazing can open up niches in canopies of warm season grass communities and facilitate invasion but not in cool season grass communities. The mechanism …
Environmental Triggers Of Winter Annual Weed Emergence And Management To Reduce Soybean Cyst Nematode Reproduction On Winter Annual Weed Hosts, Rodrigo Werle
Department of Agronomy and Horticulture: Dissertations, Theses, and Student Research
Winter annual weeds are becoming more common in many row crop fields in the midwestern USA. The impact of winter annual weeds in cropping systems is often overlooked because these weeds complete their lifecycle near the time of crop sowing. However, delayed soil warming, competition for nutrients during initial establishment of the main crop, difficult planting operations, and yield loss are some of the problems caused by dense mats of winter annual weeds. Moreover, some of these weeds have been reported as alternative hosts for pests such as the soybean cyst nematode (Heterodera glycines, SCN), considered the most …
Intsormil- Centa’S New Bmr Sorghum Varieties Create A Surge In Dairy Production, René Clará Valencia
Intsormil- Centa’S New Bmr Sorghum Varieties Create A Surge In Dairy Production, René Clará Valencia
INTSORMIL Scientific Publications
Scientists from the INTSORMIL-CENTA project based at the National Center for Agricultural Technology and Forestry (CENTA) of El Salvador have worked for five years to develop varieties of sorghum for grain and forage that are highly nutritious to cattle. Using the gene bmr-12, received from Dr. Gebisa Ejeta of Purdue University, they combined commercial varieties CENTA S-2, S-3 CENTA, CENTA RCV and VG 146 and were able to form new varieties containing this same gene. The first generation created 76 new varieties.
Arkansas Corn And Grain Sorghum Performance Tests 2012, R. D. Bond, D. G. Dombek, J. A. Still, R. M. Pryor
Arkansas Corn And Grain Sorghum Performance Tests 2012, R. D. Bond, D. G. Dombek, J. A. Still, R. M. Pryor
Arkansas Agricultural Experiment Station Research Series
Corn and grain sorghum performance tests are conducted each year in Arkansas by the University of Arkansas System Division of Agriculture. The tests provide information to companies marketing seed within the state and aid the Arkansas Cooperative Extension Service in formulating recommendations for producers.
Economic Contribution Of The Agricultural Sector To The Arkansas Economy In 2010, Katherine Mcgraw, Jennie Popp, Wayne Miller
Economic Contribution Of The Agricultural Sector To The Arkansas Economy In 2010, Katherine Mcgraw, Jennie Popp, Wayne Miller
Research Reports and Research Bulletins
This report is the seventh in a series of reports examining agriculture’s economic contribution on the Arkansas economy. Utilizing data from the United States Bureau of Economic Analysis (BEA), USDA Economic Research Service (ERS), USDA National Agricultural Statistics Service (NASS), and Minnesota IMPLAN Group, Inc. (MIG), the economic contribution of agriculture on the Arkansas economy was estimated for the most recent year available, 2010. Gross Domestic Product (GDP) by State information for Arkansas in 2010 was compared with those of other states in the Southeast U.S. to give a measure of the relative importance of agriculture in Arkansas.2 The total …
Variedad De Sorgo Para Grano De Ciclo Precoz Centa Liberal, Intsormil-Centa
Variedad De Sorgo Para Grano De Ciclo Precoz Centa Liberal, Intsormil-Centa
INTSORMIL Scientific Publications
El sorgo es una alternativa para las familias agricultoras dedicadas a la producción de grano debido a la capacidad que tiene de tolerar sequías prolongadas.
Sus características lo vuelven una alternativa, incluso para sustituir al maíz, aún con las limitantes hídricas que se han incrementado en los últimos años debido a los efectos del cambio climático.
Es un cultivo rústico capaz de producir en condiciones adversas de suelo (excepto suelos mal drenados), clima y de poco manejo agronómico; se adapta desde los 10 hasta los 1000 m.s.n.m.
La variedad CENTA Liberal que hoy se pone a disposición de los productores …
Centa S-3 Bmr Y Centa S-4 Bmr: Variedades De Sorgo Forrajero Para Ensilaje, Intsormil-Centa
Centa S-3 Bmr Y Centa S-4 Bmr: Variedades De Sorgo Forrajero Para Ensilaje, Intsormil-Centa
INTSORMIL Scientific Publications
Siendo la nutrición animal un factor importante para el éxito de la ganadería de leche y carne en El Salvador, el Centro Nacional de Tecnología Agropecuaria y Forestal “Enrique Álvarez Córdova” (CENTA), en colaboración con el Instituto de Sorgo, Mijo y Otros Granos (INTSORMIL), ha desarrollado dos nuevas variedades de sorgo para ensilaje con alta digestibilidad, capaces de incrementar la producción de leche y carne en el ganado bovino con el objetivo de fortalecer la seguridad alimentaria en el país.
La utilización del sorgo en forma de ensilaje se ha incrementado en nuestro país a partir de los años 80, …
Marketing Contracts, Overconfidence, And Timing In The Canadian Wheat Market, Fabio L. Mattos, Stefanie A. Fryza
Marketing Contracts, Overconfidence, And Timing In The Canadian Wheat Market, Fabio L. Mattos, Stefanie A. Fryza
Department of Agronomy and Horticulture: Faculty Publications
This paper investigates factors that impact marketing performance in the Canadian wheat market. Using data provided by the Canadian Wheat Board (CWB) for six crop years, results indicate that producers were not able to profitably use all marketing contracts offered by the CWB, earlier pricing tended to generate better performance, there was a negative relationship between activeness and performance (suggesting overconfidence in marketing skills), and performance was generally worse in volatile crop years. Further analysis reveals some of these findings differ when outperforming and underperforming producers are investigated separately, particularly with respect to activeness and volatility.
Survey Of Endosymbionts In The Diaphorina Citri Metagenome And Assembly Of A Wolbachia Wdi Draft Genome, Surya Saha, Wayne B. Hunter, Justin Reese, J. Kent Morgan, Mizuri Marutani-Hert, Hong Huang, Magdalen Lindeberg
Survey Of Endosymbionts In The Diaphorina Citri Metagenome And Assembly Of A Wolbachia Wdi Draft Genome, Surya Saha, Wayne B. Hunter, Justin Reese, J. Kent Morgan, Mizuri Marutani-Hert, Hong Huang, Magdalen Lindeberg
School of Information Faculty Publications
Diaphorina citri (Hemiptera: Psyllidae), the Asian citrus psyllid, is the insect vector of Ca. Liberibacter asiaticus, the causal agent of citrus greening disease. Sequencing of the D. citrimetagenome has been initiated to gain better understanding of the biology of this organism and the potential roles of its bacterial endosymbionts. To corroborate candidate endosymbionts previously identified by rDNA amplification, raw reads from the D. citri metagenome sequence were mapped to reference genome sequences. Results of the read mapping provided the most support for Wolbachia and an enteric bacterium most similar to Salmonella. Wolbachia-derived reads were extracted using …
Summaries Of Arkansas Cotton Research 2011, Derrick M. Oosterhuis
Summaries Of Arkansas Cotton Research 2011, Derrick M. Oosterhuis
Arkansas Agricultural Experiment Station Research Series
No abstract provided.
Amelioration Of Root Disease Of Subterranean Clover (Trifolium Subterraneum) By Mineral Nutrients, Tim Scanlon, Tiernan A. O’Rourke, Megan H. Ryan, Martin J. Barbetti, Krishnapillai Sivasithamparam
Amelioration Of Root Disease Of Subterranean Clover (Trifolium Subterraneum) By Mineral Nutrients, Tim Scanlon, Tiernan A. O’Rourke, Megan H. Ryan, Martin J. Barbetti, Krishnapillai Sivasithamparam
Journal articles
Subterranean clover (Trifolium subterraneum) is a key pasture legume across southern Australia and elsewhere. Decline in subterranean clover pastures was first recognised in Australia during the 1960s and manifests as an increase in weeds and a decrease in desirable legume species. While both root disease and poor nutrition contribute to subterranean clover pasture decline, the relationships between root disease and nutrition have not been determined. The objective of this study was to define these relationships. Field experiments were undertaken to determine the nutritional and pathogen status of soils and subterranean clover from three Western Australian field sites. Subsequently, …
Innovative Approach To Active Learning, John G. Graveel, George E. Van Scoyoc
Innovative Approach To Active Learning, John G. Graveel, George E. Van Scoyoc
IMPACT Presentations
Presentation on a course redesign and project plan given at the American Society of Agronomy Annual Meeting, Cincinnati, OH.
Asareca-Intsormil: Regional Sorghum Research And Development Workshop, September 2–6, 2012, Executive Hotel, Adama, Ethiopia, Kimberly Christiansen
Asareca-Intsormil: Regional Sorghum Research And Development Workshop, September 2–6, 2012, Executive Hotel, Adama, Ethiopia, Kimberly Christiansen
INTSORMIL Scientific Publications
Priorities in Sorghum Research and Development Cross-Cutting Elements
All priorities should be cognizant and address:
Gender responsiveness
User friendliness in sharing knowledge and information
Sustainable growth
Capacity building
Collaboration with public and private partners especially NARS, and regional and international organizations
Production
Integrated soil and water management in response to climate change
Integrated pest management
Cropping systems
Mechanization to alleviate drudgery
Breeding/Genetics
Breeding high yielding sorghum cultivars with enhanced ecological adaptation (drought tolerance and Striga resistance and diseases and pests) and superior grain quality
Development, release and distribution of enhanced sorghum germplasm materials with desired end-use quality attributes (malt, biofuel, …
Studies Of Drought Tolerance Of Hard Red Winter Wheat (Triticum Aestivum L.) Cultivars In Nebraska, Sumardi Bin Abdul Hamid
Studies Of Drought Tolerance Of Hard Red Winter Wheat (Triticum Aestivum L.) Cultivars In Nebraska, Sumardi Bin Abdul Hamid
Department of Agronomy and Horticulture: Dissertations, Theses, and Student Research
In Nebraska, about 75% of the wheat production is in the western half of the state, and about 92% of the winter wheat acreage is in dryland production, where productivity is limited by low and/or uncertain rainfall. We have investigated the effects of water stress on few established winter wheat (Triticum aestivumL.) cultivars, which are known for their superior adaptation to either rainfed or irrigated wheat production systems in western Nebraska. We also began a study to investigate the variation in the root system architecture to confer drought tolerance in winter wheat. The objectives of this study were …
Arkansas Wheat Cultivar Performance Tests 2011-2012, R. E. Mason, R. G. Miller, J. P. Kelley, E. A. Milus
Arkansas Wheat Cultivar Performance Tests 2011-2012, R. E. Mason, R. G. Miller, J. P. Kelley, E. A. Milus
Arkansas Agricultural Experiment Station Research Series
Wheat cultivar performance tests are conducted each year in Arkansas by the Arkansas Agricultural Experiment Station, Department of Crop, Soil and Environmental Sciences. The tests provide information to companies developing cultivars and/or marketing seed within the state and aid the Arkansas Cooperative Extension Service in formulating cultivar recommendations for small-grain producers.
B.R. Wells Rice Research Studies 2011, R. J. Norman, K.A. K. Moldenhauer
B.R. Wells Rice Research Studies 2011, R. J. Norman, K.A. K. Moldenhauer
Arkansas Agricultural Experiment Station Research Series
No abstract provided.
Is Local Food In Your Future?: An Analysis Of The Viability Of The Local Food Movement, Jennifer A. Sliney
Is Local Food In Your Future?: An Analysis Of The Viability Of The Local Food Movement, Jennifer A. Sliney
Pell Scholars and Senior Theses
The Local Food Movement has arisen in recent decades as a proposed solution to problems in the current food distribution system. Proponents of the movement look to solve problems such as unsustainable farming practices, greenhouse gas emissions, and unhealthy communities. Skeptics raise questions as to whether local food is truly capable of accomplishing any of those. The author proposes that as a solution, aspects of the Local Food Movement such as urban agriculture and attempts at community development should be taken more seriously in order to create a better future for the land and people alike.
Intensive Production Of Millet And Sorghum For Evolving Markets In The Sahel, John H. Sanders, Botorou Ouendeba
Intensive Production Of Millet And Sorghum For Evolving Markets In The Sahel, John H. Sanders, Botorou Ouendeba
INTSORMIL Scientific Publications
One principal constraint to improving the performance of millet and sorghum systems is overcoming the conventional wisdom. The conventional wisdom has some or all of these characteristics depending upon where you hear it. “Sorghum and millet are subsistence crops.” “They do not respond to fertilization.” “Even if they do respond to fertilizer, it is not profitable.” “Farmers will not use fertilization on these crops even if there were agronomic and economic responses.” “Banks will not lend to farmers for sorghum and millet fertilization.”
Feed The Future Releases Two New Sorghum Varieties In Nicaragua, Kimberly Christiansen
Feed The Future Releases Two New Sorghum Varieties In Nicaragua, Kimberly Christiansen
INTSORMIL Impacts and Bulletins
de Tecnologia Agropecuaria (INTA), the Collaborative Research Support Program for Sorghum, Millet and Other Grains (INTSORMIL) has released two new varieties of sorghum in Nicaragua that will be used for forage (plant material eaten by grazing livestock).
These new varieties exhibit the “brown midrib” trait (bmr), which has been used for many years by sorghum producers in the United States. The bmr trait increases the digestibility of sorghum by reducing the amount of lignin, a chemical compound found in the cell walls of plants. The more digestible sorghum is for the livestock that consume it, the higher the quality of …
Susceptibility Of The Fall Armyworm, Spodoptera Frugiperda (Lepidoptera: Noctuidae), At Santa Isabel, Puerto Rico, To Different Insecticides, Difabachew K. Belay, Randy M. Huckaba, John E. Foster
Susceptibility Of The Fall Armyworm, Spodoptera Frugiperda (Lepidoptera: Noctuidae), At Santa Isabel, Puerto Rico, To Different Insecticides, Difabachew K. Belay, Randy M. Huckaba, John E. Foster
Department of Entomology: Faculty Publications
The fall armyworm (FAW), Spodoptera frugiperda (J. E. Smith), is a polyphagous migratory pest, which is endemic to the Western Hemisphere and attacks more than 80 plant species including maize, sorghum, cotton, rice, millet, peanut, alfalfa, and other cultivated and wild plant species. Presence of multiple generations and the ability to migrate and feed on a wide range of host plants makes FAW one of the most severe economic pests throughout the Western Hemisphere. In corn, yield losses due to FAW damage can reach up to 32% in the United States and 45–60% in Nicaragua. Insecticides are used as major …
Composting Manure And Other Organic Materials, Charles S. Wortmann, Charles A. Shapiro
Composting Manure And Other Organic Materials, Charles S. Wortmann, Charles A. Shapiro
Department of Agronomy and Horticulture: Faculty Publications
The Composting Process
Composting is the aerobic decomposition of manure or other organic materials in the thermophilic temperature range (104-149oF). Composted material is odorless, fine-textured, and low-moisture. It can be bagged and sold for use in gardens or nurseries, or used as fertilizer on cropland with little odor or fly breeding potential. Composting improves the handling characteristics of any organic residue by reducing its volume and weight. Composting can kill pathogens and weed seeds.
Disadvantages of composting organic residues include loss of nitrogen and other nutrients, time for processing, cost for handling equipment, available land for composting, odors, marketing, diversion …
Effects Of Thiamethoxam Seed Treatments On Bean Leaf Beetles, Chelsea L. Piitz
Effects Of Thiamethoxam Seed Treatments On Bean Leaf Beetles, Chelsea L. Piitz
Department of Entomology: Dissertations, Theses, and Student Research
The increased use of thiamethoxam seed treatments for controlling target pests such as the bean leaf beetle, Cerotoma trifurcata (Forster), suggests the need for methods to measure and monitor the development of resistance to these insecticides. Overwintering and F1 bean leaf beetles were collected from alfalfa and soybean fields and used in early growth stage soybean studies to measure toxicity of thiamethoxam both in greenhouse experiments and laboratory bioassays involving exposure to treated foliage. Lethal and sub-lethal effects were detected in both greenhouse and lab bioassays. Lethal concentrations determined from laboratory assays were compared with residues determined from field grown …
Crop Management Technologies Approved/Recommended To Farmers By Intsormil Supported Nars Programs 2006-2012, Elvis A. Heinrichs
Crop Management Technologies Approved/Recommended To Farmers By Intsormil Supported Nars Programs 2006-2012, Elvis A. Heinrichs
INTSORMIL Scientific Publications
Table listing year, crop (sorghum or pearl millet), country, technology approved/ recommended for release to farmers (sowing rate, spacing, fertilizer, pesticide, herbicide, tied ridges etc.), and comments regarding crop management technologies approved/recommended to farmers by INTSORMIL-supported NARS programs, 2006-2012. Countries included are: Burkina Faso, Ethiopia, Ghana, Mali, Mozambique, Niger, Uganda, Zambia, El Salvador, and Nicaragua.
Escape From Preferential Retention Following Repeated Whole Genome Duplications In Plants, James C. Schnable, Xiaowu Wang, J. Chris Pires, Michael Freeling
Escape From Preferential Retention Following Repeated Whole Genome Duplications In Plants, James C. Schnable, Xiaowu Wang, J. Chris Pires, Michael Freeling
Department of Agronomy and Horticulture: Faculty Publications
The well supported gene dosage hypothesis predicts that genes encoding proteins engaged in dose–sensitive interactions cannot be reduced back to single copies once all interacting partners are simultaneously duplicated in a whole genome duplication. The genomes of extant flowering plants are the result of many sequential rounds of whole genome duplication, yet the fraction of genomes devoted to encoding complex molecular machines does not increase as fast as expected through multiple rounds of whole genome duplications. Using parallel interspecies genomic comparisons in the grasses and crucifers, we demonstrate that genes retained as duplicates following a whole genome duplication have only …
Insecticidal Control Of Bemisia Tabaci (Hemiptera: Aleyrodidae) Transmitting Carlavirus On Soybeans And Detection Of The Virus In Alternate Hosts, Difabachew K. Belay, Randy M. Huckaba, Axel M. Ramirez, Jose C. V. Rodrigues, John E. Foster
Insecticidal Control Of Bemisia Tabaci (Hemiptera: Aleyrodidae) Transmitting Carlavirus On Soybeans And Detection Of The Virus In Alternate Hosts, Difabachew K. Belay, Randy M. Huckaba, Axel M. Ramirez, Jose C. V. Rodrigues, John E. Foster
Department of Entomology: Faculty Publications
A Carlavirus transmitted by Bemisia tabaci (Gennadius) (Hemiptera: Aleyrodidae) is an important disease of soybean nurseries in Puerto Rico causing substantial germplasm losses. Insecticide bioassay experiments were conducted at Dow AgroSciences (DAS) Research Station, Santa Isabel, Puerto Rico, either by spraying insecticides on B. tabaci infested soybean leaves or introducing B. tabaci adults onto insecticide-sprayed soybean leaves. Moreover, host plants were surveyed to detect the virus in overwintering hosts that serve as a source of inoculums. The direct spray experiment showed that Nuprid 2F (Imidacloprid), Capture 2 EC (Bifenthrin), Thionex (Endosulfan), Lannate LV (Methomyl), and Dimethoate gave good level ( …
Weed Science Research Summaries 2011, K. L. Smith, J. A. Bullington, R. C. Doherty, J. R. Meier
Weed Science Research Summaries 2011, K. L. Smith, J. A. Bullington, R. C. Doherty, J. R. Meier
Arkansas Agricultural Experiment Station Research Series
No abstract provided.
Returns To The Introduction Of New Sorghum Cultivars Into The Dairy Industry Of El Salvador, Alexis Homero Villacís Aveiga
Returns To The Introduction Of New Sorghum Cultivars Into The Dairy Industry Of El Salvador, Alexis Homero Villacís Aveiga
INTSORMIL Scientific Publications
The returns to the introduction of new photo-insensitive sorghum varieties into the dairy industry were analyzed to determine changes in the welfare of consumers, processors, producers and the society. The economic surplus method was used along with a survey data of a stratified sample of 150 farms conducted in 2011 in El Salvador. Results indicate that there are large returns per dollar spent and substantial benefits to consumers, processors and producers. Results also show that the adoption of these new technologies represents advantages in production costs of milk in each farm size. These cost savings per bottle are very small …