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Articles 1 - 30 of 41
Full-Text Articles in Life Sciences
Arkansas Corn And Grain Sorghum Performance Tests 2008, D. G. Dombek, R. D. Bond, I. L. Eldridge, R. M. Pryor
Arkansas Corn And Grain Sorghum Performance Tests 2008, D. G. Dombek, R. D. Bond, I. L. Eldridge, 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 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.
Arkansas Animal Science Department Report 2008, Zelpha B. Johnson, D. Wayne Kellogg
Arkansas Animal Science Department Report 2008, Zelpha B. Johnson, D. Wayne Kellogg
Arkansas Agricultural Experiment Station Research Series
No abstract provided.
Summaries Of Arkansas Cotton Research 2007, Derrick M. Oosterhuis
Summaries Of Arkansas Cotton Research 2007, Derrick M. Oosterhuis
Arkansas Agricultural Experiment Station Research Series
No abstract provided.
Arkansas Small-Grain Cultivar Performance Tests 2007-2008, J. T. Kelly, M. J. Emerson, R. K. Bacon
Arkansas Small-Grain Cultivar Performance Tests 2007-2008, J. T. Kelly, M. J. Emerson, R. K. Bacon
Arkansas Agricultural Experiment Station Research Series
Small-grain 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 smallgrain producers
B.R. Wells Rice Research Studies 2007, R. J. Norman, J. F. Meullenet, K. A.K. Moldenhauer
B.R. Wells Rice Research Studies 2007, R. J. Norman, J. F. Meullenet, K. A.K. Moldenhauer
Arkansas Agricultural Experiment Station Research Series
No abstract provided.
Wayne E. Sabbe Arkansas Soil Fertility Studies 2007, Nathan A. Slaton
Wayne E. Sabbe Arkansas Soil Fertility Studies 2007, Nathan A. Slaton
Arkansas Agricultural Experiment Station Research Series
Rapid technological changes in crop management and production require that the research efforts also be presented in an expeditious manner. The contributions of soil fertility and fertilizers are major production factors in all Arkansas crops. The studies described within will allow producers to compare their practices with the university’s research efforts. Additionally, soil test data and fertilizer sales are presented to allow comparisons among years, crops, and other areas within Arkansas.
Arkansas Turfgrass Report 2007, Michael Richardson, Douglas Karcher, Aaron Patton
Arkansas Turfgrass Report 2007, Michael Richardson, Douglas Karcher, Aaron Patton
Arkansas Agricultural Experiment Station Research Series
No abstract provided.
Arkansas Cotton Variety Test 2007, Fred M. Bourland, A. B. Beach, J. M. Hornbeck, A. J. Hood
Arkansas Cotton Variety Test 2007, Fred M. Bourland, A. B. Beach, J. M. Hornbeck, A. J. Hood
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.
Earthworm Abundances In Endophyte-Infected Tall Fescue Pastures In Northwest Arkansas, Ashley Rashe, Mary C. Savin
Earthworm Abundances In Endophyte-Infected Tall Fescue Pastures In Northwest Arkansas, Ashley Rashe, Mary C. Savin
Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences
The ecology of organisms that co-evolve within an ecosystem is likely to be distinct from that involving organisms recently introduced into an area. To better understand the relationship of earthworms with endophyte-infected tall fescue, earthworms in novel and toxic endophyte-infected tall fescue pastures were enumerated and identified as adults or juveniles. We hypothesized that differences in endophyte infection of the fescue would influence earthworm abundances. Earthworms in two toxic and two novel endophyte-infected tall fescue fields in Fayetteville, Ark., were sampled weekly from January through July 2007. Each type of endophyte-infected pasture was established in 1997 and 2003. Sampling was …
Amphibian, Reptile, And Small Mammal Associates Of Ozark Pocket Gopher Habitat In Izard County, Arkansas, M. Connior, I. Guenther, Thomas S. Risch, Stanley E. Trauth
Amphibian, Reptile, And Small Mammal Associates Of Ozark Pocket Gopher Habitat In Izard County, Arkansas, M. Connior, I. Guenther, Thomas S. Risch, Stanley E. Trauth
Journal of the Arkansas Academy of Science
We conducted a study of the amphibian, reptile, and small mammal community assemblage of Ozark pocket gopher (Geomys bursarius ozarkensis) habitat in north-central Arkansas. We used 2 methods to capture individuals: hand capture and drift fences. During the study, we captured and marked a total of 9 anuran, 4 salamander, 5 lizard, 3 turtle, 16 snake, and 8 small mammal species exclusive of pocket gophers. We found one hatchling three-toed box turtle (Terrapene carolina triunguis) and one rough earth snake (Virginia striatula) inside a pocket gopher burrow and mound, respectively. Additionally, we witnessed both eastern racers (Coluber constrictor) and eastern …
Compatible Stem Taper And Total Tree Volume Equations For Loblolly Pine Plantations In Southeastern Arkansas, C. Vanderschaaf
Compatible Stem Taper And Total Tree Volume Equations For Loblolly Pine Plantations In Southeastern Arkansas, C. Vanderschaaf
Journal of the Arkansas Academy of Science
A system of equations was used to produce compatible outside-bark stem taper and total tree volume equations for loblolly pine (Pinus taeda L.) plantations in southeastern Arkansas. Paired height diameter stem measurements were obtained from trees located in one 45-year-old unthinned plantation. After fitting and integrating the stem taper equation to total tree height, an individual tree constant form factor volume equation was obtained. The stem taper equation can also be integrated to any merchantable height to obtain merchantable volume. To see how the constant form factor volume equation predicts outside bark volume for trees vastly different than those used …
Considerations For Starting A Winery, Justin R. Morris
Considerations For Starting A Winery, Justin R. Morris
Research Reports and Research Bulletins
This publication is for anyone who has ever considered entering the wine industry. The goal of this publication is to provide information about requirements and procedures for starting a winery. It is not a “how-to” manual but rather is designed to serve as a starting point to investigate the many aspects of owning and operating a winery. Although the manuscript frequently refers to procedures for starting a winery in Arkansas, the concepts presented are applicable throughout the U.S. Detailed economic information on starting a winery is covered in a companion publication. Both publications are part of a project supported by …
Effects Of Storage Temperature And Duration On The Milling Properties Of Rice, Tanya Pereira, Nora Cooper, Terry Siebenmorgen
Effects Of Storage Temperature And Duration On The Milling Properties Of Rice, Tanya Pereira, Nora Cooper, Terry Siebenmorgen
Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences
To maximize rice quality, it is essential to quantify the various factors that affect milling properties of rice. Rice aging, a process during which rice undergoes a series of chemical and physicochemical changes, affects head rice yield (HRY) and the rate at which HRY changes with degree of milling (DOM). This study examined effects of storage duration (0, 2, and 4 months) and storage temperature (4, 21, and 35°C) on milling properties of ‘Wells’ (long-grain) and ‘Jupiter’ (medium-grain) rice cultivars. In general, HRY increased with storage duration, most significantly for Wells cultivar. Millability curves were developed by plotting HRY vs. …
Letter From The Dean, Lalit R. Verma
Letter From The Dean, Lalit R. Verma
Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences
No abstract provided.
Discovery: The Student Journal Of Dale Bumpers College Of Agricultural, Food And Life Sciences - Volume 9 2008, Several Authors
Discovery: The Student Journal Of Dale Bumpers College Of Agricultural, Food And Life Sciences - Volume 9 2008, Several Authors
Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences
No abstract provided.
Investigating The Effectiveness Of Malic Acid, Nisin, And Grape Seed Extract Incorporated Into Whey-Protein Coatings To Inhibit The Growth Of Listeria Monocytogenes On Ready-To-Eat Poultry, Amanda Bettasso, Navam Hettiarachychy, Vidya Chitturi, Michael Johnson
Investigating The Effectiveness Of Malic Acid, Nisin, And Grape Seed Extract Incorporated Into Whey-Protein Coatings To Inhibit The Growth Of Listeria Monocytogenes On Ready-To-Eat Poultry, Amanda Bettasso, Navam Hettiarachychy, Vidya Chitturi, Michael Johnson
Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences
The ability to control growth of Listeria monocytogenes on ready-to-eat poultry products with the antimicrobials nisin, malic acid, and grape seed extract incorporated into whey-protein coatings was evaluated. The antimicrobials were incorporated into the coating solution alone and in combinations. One gram pieces of turkey frankfurters were coated with the coating solutions and then inoculated with L. monocytogenes and stored at 4°C for 28 days. The inhibitory effect of the coatings on turkey frankfurter pieces was evaluated on d 0, 7, 14, 21, and 28. Coatings containing 2% malic acid, 3% malic acid, and the combination of nisin (6,000 IU/g) …
Psycho-Social Effects Of A Brain-Training Program Among Healthy Older Adults, Desma Hurley, M. Jean Turner, William C. Bailey
Psycho-Social Effects Of A Brain-Training Program Among Healthy Older Adults, Desma Hurley, M. Jean Turner, William C. Bailey
Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences
Grounded in cognitive neuroscience and social exchange theory, this research evaluated the relationship between changes in cognitive functioning and two psycho-social dimensions of life among healthy adults over the age of 70 (N=12). Specific psycho-social dimensions examined were social interaction and depression. Six females and six males participated in the study. All were white, college-educated individuals residing in a life-care residential retirement community. The participants used the Posit Science® Brain Fitness Program™, an auditory-based computer training program that improves memory and speed of processing, for forty hours over an eight-week period. Pre- and post-tests related to social interaction and depressive …
Impact Of Stressing A Pen Mate On Physiological Responses Of Growing Pigs, Brent Koonce, Elizabeth B. Kegley, Doug Galloway, Jason Apple
Impact Of Stressing A Pen Mate On Physiological Responses Of Growing Pigs, Brent Koonce, Elizabeth B. Kegley, Doug Galloway, Jason Apple
Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences
Crossbred barrows and gilts (n = 36), weighing 16.59 ± 2.1 kg, were used to test the effects of stressing a pen mate on the physiological responses of growing pigs. Pigs were randomly allotted to 6 groups after stratifying according to gender, litter origin, and body weight. Dominance order was determined within each group, and 1 to 3 d prior to the stress treatment the most- and leastdominant pigs within a group were fitted with indwelling catheters in their vena cavas. Over 3 d, groups were either: 1) isolated from audile and visual contact with stressed pigs in a separate …
An Acreage Response Model For Arkansas Rice Farms, J. Grant Ballard, Michael R. Thomsen
An Acreage Response Model For Arkansas Rice Farms, J. Grant Ballard, Michael R. Thomsen
Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences
In recent years, market forces have signaled a strong demand for rice as well as other Arkansas crops. However, high fuel, fertilizer, and chemical costs have negatively impacted farm income, and these input costs are widely known to impact planting decisions of farmers. The goal of this study is to develop and estimate an acreage response model for rice. The model is used to compute acreage response elasticities and provides insight into roles that input costs and crop prices play in acreage decisions made by producers. Economic theory predicts that prices for important inputs such as fuels and fertilizers as …
The Effect Of Austrian Winter-Pea Cover Crop And Cow-Pea Companion Crop On Corn Yield, Matthew Marsh, David Longer, Vaughn Skinner
The Effect Of Austrian Winter-Pea Cover Crop And Cow-Pea Companion Crop On Corn Yield, Matthew Marsh, David Longer, Vaughn Skinner
Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences
Leguminous cover crops have the potential to combat the rising input cost of commercial nitrogen (N) fertilizers. This experiment examines benefits of implementing a leguminous cover and/or companion crop into a corn production system. Legumes biologically fix nitrogen from the atmosphere, adding to the nitrogen content of the soil. In this experiment Austrian winter peas (Pisum arvense) (AWP) were used as the leguminous cover crop and cowpeas (Vigna unguiculata) were used as the companion crop. A two year experiment was carried out in which winter peas were planted on half the field in the fall and allowed to grow until …
Subcritical Water And Carbonated Water Extraction Of Anthocyanins From Grape Pomace, Lydia Rice, L. R. Howard
Subcritical Water And Carbonated Water Extraction Of Anthocyanins From Grape Pomace, Lydia Rice, L. R. Howard
Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences
Grape pomace, a by-product of juice and wine processing, is a rich source of anthocyanins, antioxidant compounds that may afford protection against cancer and coronary heart disease. Unfortunately, traditional extraction of these antioxidants involves use of organic solvents, which pose serious safety and disposal problems for industry. Clearly a need exists for “green” extraction technologies—such as use of subcritical water—that eliminate or reduce the amount of organic solvents. In this study, we determined the efficacy of subcritical and carbonated water in extraction of anthocyanins from red grape pomace. Extraction variables including particle size, pomace mass, and temperature were optimized, and …
Investigating The Utilization Of Silica Gel Packets In Drying Research-Scale Rough Rice Samples, Ashley Wiedower, George Ondier, Terry Siebenmorgen
Investigating The Utilization Of Silica Gel Packets In Drying Research-Scale Rough Rice Samples, Ashley Wiedower, George Ondier, Terry Siebenmorgen
Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences
Rice moisture content (MC) must be reduced to approximately 12.5% MC to prevent spoilage during storage. Desiccants may provide an improved method for drying research-scale rice samples. This study investigated the effects of 1) rice mass to be dried, 2) placement method of silica gel packets in rice samples, 3) regeneration and re-use of the packets, 4) drying temperature, and 5) initial MC on the effectiveness of silica gel packets to dry rough rice samples to the desired 12.5% MC. Multiple masses (200, 500, and 1000 g) of long-grain rice samples were dried using three desiccant placement treatments: 1) intimate …
Contents, Discovery Editors
Contents, Discovery Editors
Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences
No abstract provided.
Investigating Current Efficacies Of Several Nematocides For Use In Cattle According To The Fecal Egg Count Reduction Test, Tifanie Silver, Chris Tucker, Jeremy Powell, Jana Reynolds, Zelpha Johnson, Bill Lindsey, Pete Hornsby, T. A. Yazwinski
Investigating Current Efficacies Of Several Nematocides For Use In Cattle According To The Fecal Egg Count Reduction Test, Tifanie Silver, Chris Tucker, Jeremy Powell, Jana Reynolds, Zelpha Johnson, Bill Lindsey, Pete Hornsby, T. A. Yazwinski
Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences
Utilizing small groups of naturally infected replacement heifers, fecal egg count reduction tests (FECRT) were conducted in the later months of 2007 at the University of Arkansas Savoy Research Station. Each test was 28 d in length, consisting of individual fecal nematode egg counts (EPG) and coprocultures. For the first test, the calves were ranked by beginning EPG, blocked, and randomly assigned treatment within each block. Nine to ten animals were in each treatment group. In this test, neither IVOMEC (® Merial) or IVERMECTIN (® Durvet), both delivered as an injectable at the rate of 0.2 mg of ivermectin kg-1 …
Instructions For Authors, Discovery Editors
Instructions For Authors, Discovery Editors
Discovery, The Student Journal of Dale Bumpers College of Agricultural, Food and Life Sciences
No abstract provided.
Distribution And Taxonomic Status Of Tarantulas In Arkansas (Theraphosidae: Aphonopelma), Michael D. Warriner
Distribution And Taxonomic Status Of Tarantulas In Arkansas (Theraphosidae: Aphonopelma), Michael D. Warriner
Journal of the Arkansas Academy of Science
The genus Aphonopelma (Theraphosidae) is marked by a dearth of distributional data and a problematic taxonomy. To develop occurrence information for the genus in Arkansas, I conducted a citizen-science based survey augmented by field work and examination of museum collections. Results of these efforts yielded a significant amount of data that enabled the construction of a county level map of Aphonopelma distribution in Arkansas; a resource hitherto unavailable. Three Aphonopelma species have been described as occurring in Arkansas: A. baergi, A. hentzi, and A. odelli. Specimens were collected from Arkansas and Oklahoma to evaluate taxonomic and historical issues concerning the …
Arkansas Endemic Biota: An Update With Additions And Deletions, H. Robison, C. Mcallister, C. Carlton, G. Tucker
Arkansas Endemic Biota: An Update With Additions And Deletions, H. Robison, C. Mcallister, C. Carlton, G. Tucker
Journal of the Arkansas Academy of Science
It has been over a decade since the publication of Robison and Allen (1995) that provided the definitive list of endemic flora and fauna of Arkansas. The present study brings up-to-date the endemic biota of the state. Since 1995, several new species have been described and new discoveries have been made, adding species to the state biota. Other species are deleted and new distributional information on other state endemics is presented. Specifically, 3 new plant species are added to the state list while 4 plant species are deleted. Sixteen new animal species/subspecies are added to the state list while numerous …
Rabies Prevalence Among And New Distribution Records Of Arkansas Bats, D. Blake Sasse, David A. Saugey
Rabies Prevalence Among And New Distribution Records Of Arkansas Bats, D. Blake Sasse, David A. Saugey
Journal of the Arkansas Academy of Science
No abstract provided.
Historical Forest Landscape Changes In The Buffalo River Sub-Basin In Arkansas, Robert C. Weih Jr., A. Dick
Historical Forest Landscape Changes In The Buffalo River Sub-Basin In Arkansas, Robert C. Weih Jr., A. Dick
Journal of the Arkansas Academy of Science
Forested areas in the United States have been altered since the time of European settlement. For this reason, research interests have increased in comparing present day vegetation with that of the preEuroamerican era to see what changes, if any, have occurred in some of our more outstanding natural areas. Such studies have been conducted in other parts of the United States but limited research has been done in Arkansas. The General Land Office (GLO) surveys of Arkansas were originally conducted between approximately 1815 and 1850 shortly after Arkansas was acquired from France by means of the Louisiana Purchase and provides …
Comparison Of Pine Height Models For The Crossett Experimental Forest, Don C. Bragg
Comparison Of Pine Height Models For The Crossett Experimental Forest, Don C. Bragg
Journal of the Arkansas Academy of Science
Many models to predict tree height from diameter have been developed, but not all are equally useful. This study compared a set of height-diameter models for loblolly (Pinus taeda) and shortleaf (Pinus echinata) pines from Ashley County, Arkansas. Almost 560 trees ranging in diameter at breast height (DBH) from 0.3 cm (both species) to 91.9 cm (for shortleaf) or 108.2 cm (for loblolly) were chosen for measurement. Height equations were then fit to four different functions (Chapman-Richards, modified logistic, exponential, and Curtis-Arney) with weighted nonlinear least squares regression using DBH as the only predictor. Models were evaluated using a series …