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Articles 1 - 30 of 43
Full-Text Articles in Life Sciences
Northeast Research Station Watertown, South Dakota Annual Progress Report, 2010, Agricultural Experiment Station, Plant Science Department
Northeast Research Station Watertown, South Dakota Annual Progress Report, 2010, Agricultural Experiment Station, Plant Science Department
Agricultural Experiment Station and Research Farm Annual Reports
This is the 2010 annual progress report for the Northeast Research Station in Watertown, South Dakota. This report is issued by the South Dakota Agricultural Experiment Station and the South Dakota State University Plant Science Department. This report includes weather data, yield comparisons, crop performance trials, corn trials, soybean trials, winter wheat performance testing, Barley Foliar information, weed and pest control, herbicide demonstrations, canola and flax variety trials and more.
Radiative Forcing Over The Conterminous United States Due To Contemporary Land Cover Use Change And Sensitivity To Snow And Interannual Albedo Variability, Christoper A. Barnes, David P. Roy
Radiative Forcing Over The Conterminous United States Due To Contemporary Land Cover Use Change And Sensitivity To Snow And Interannual Albedo Variability, Christoper A. Barnes, David P. Roy
GSCE Faculty Publications
Satellite‐derived land cover land use (LCLU), snow and albedo data, and incoming surface solar radiation reanalysis data were used to study the impact of LCLU change from 1973 to 2000 on surface albedo and radiative forcing for 58 ecoregions covering 69% of the conterminous United States. A net positive surface radiative forcing (i.e., warming) of 0.029 Wm−2 due to LCLU albedo change from 1973 to 2000 was estimated. The forcings for individual ecoregions were similar in magnitude to current global forcing estimates, with the most negative forcing (as low as −0.367 Wm−2) due to the transition to forest and the …
Influence Of Physiochemical And Watershed Characteristics On Mercury Concentration In Walleye, Sander Vitreus, M., Cari-Ann Hayer, Steven R. Chipps, J. J. Stone
Influence Of Physiochemical And Watershed Characteristics On Mercury Concentration In Walleye, Sander Vitreus, M., Cari-Ann Hayer, Steven R. Chipps, J. J. Stone
Natural Resource Management Faculty Publications
Elevated mercury concentration has been documented in a variety of fish and is a growing concern for human consumption. Here, we explore the influence of physiochemical and watershed attributes on mercury concentration in walleye (Sander vitreus, M.) from natural, glacial lakes in South Dakota. Regression analysis showed that water quality attributes were poor predictors of walleye mercury concentration (R2 = 0.57, p = 0.13). In contrast, models based on watershed features (e.g., lake level changes, watershed slope, agricultural land, wetlands) and local habitat features (i.e., substrate composition, maximum lake depth) explained 81% (p = 0.001) …
Corn Hybrids: Deer Taste The Difference, Joshua A. Delger, Kevin L. Monteith, Jonathan A. Jenks
Corn Hybrids: Deer Taste The Difference, Joshua A. Delger, Kevin L. Monteith, Jonathan A. Jenks
Natural Resource Management Faculty Publications
As daylight begins to illuminate the countryside, a cold wind rustles through the leaves of the weedy rows of corn that you barely had time to get in the ground this past spring. The corn plants are stunted, the few small ears of corn that did grow are not even enticing to passing blackbirds, and that stud buck captured on your trail-camera months earlier is nowhere to be seen. Meanwhile, a couple hundred yards across the fence to the south, you hear the unmistakable sound of deer running through corn. Your heart rate involuntarily increases. As the sun continues to …
Match- Mismatch Regulation For Bluegill And Yellow Perch Larvae And Their Prey In Sandhill Lakes, Jeffrey C. Jolley, David W. Willis, Richard S. Holland
Match- Mismatch Regulation For Bluegill And Yellow Perch Larvae And Their Prey In Sandhill Lakes, Jeffrey C. Jolley, David W. Willis, Richard S. Holland
Natural Resource Management Faculty Publications
Food availability may regulate fish recruitment, both directly and indirectly. The availability of zooplankton, especially to newly hatched larvae, is thought to be crucial to their early growth and survival. We examined stomach contents of larval bluegill Lepomis macrochirus and yellow perch Perca flavescens in Pelican Lake and Cameron Lake, Nebraska, in 2004 and 2005. We also determined zooplankton availability and calculated prey selection using Chesson’s a. In addition, we investigated potential match–mismatch regulation of recruitment from 2004 to 2008. Bluegill positively selected copepod nauplii and Bosmina spp., and yellow perch often selected copepods. Abundant zooplankton populations were available for …
Growing South Dakota (Fall 2010), College Of Agriculture &. Biological Sciences
Growing South Dakota (Fall 2010), College Of Agriculture &. Biological Sciences
Growing South Dakota (Publication of the College of Agriculture, Food and Environmental Sciences)
[Page] 2 Focused on Lean Growth: Despite Challenging Times, Dean Barry Dunn Has a Vision of Growth and Excellence for ABS
[Page] 6 Building Better Communities: Horizons Helps Small Town South Dakota
[Page] 8 On Campus
[Page] 9 Urban Opportunities: A New Twist to Attract Urban Youth
[Page] 10 Saddle Up: Steers for State Helps SDSU Rodeo Program Attain Success [Page] 12 Inspiring Students: This Professor's Teaching & Research Style Is Earning Awards and Student Accolades
[Page] 14 Fish Feed :The Newest Market for South Dakota Crops 15 College News [Page] 16 Field Notes from Lyman County: Bob Fanning's Experience …
Late Summer Movements By Giant Canada Geese In Relation To A September Hunting Season, Charles D. Dieter, Bobby J. Anderson, Jeffrey S. Gleason, Paul W. Mammenga, Spencer Vaa
Late Summer Movements By Giant Canada Geese In Relation To A September Hunting Season, Charles D. Dieter, Bobby J. Anderson, Jeffrey S. Gleason, Paul W. Mammenga, Spencer Vaa
Natural Resource Management Faculty Publications
The population of giant Canada geese (Branta canadensis maxima) breeding in eastern South Dakota has increased dramatically since reintroduction efforts began in the 1960s. May breeding population levels of giant Canada geese exceeded population management goals set by the South Dakota Department of Game, Fish and Parks (SDGFP) by the mid-1990s, and the population has continued to increase into the 2000s. This population increase was accompanied by an increase in goose-related conflicts such as crop depredation. In 1996, a September hunting season was implemented in select counties in eastern South Dakota in an effort to reduce the giant …
Dispersal Movements Of Subadult Cougars From The Black Hills: The Notions Of Range Expansion And Recolonization, D. J. Thompson, J. A. Jenks
Dispersal Movements Of Subadult Cougars From The Black Hills: The Notions Of Range Expansion And Recolonization, D. J. Thompson, J. A. Jenks
Natural Resource Management Faculty Publications
Dispersal plays a vital role in cougar (Puma concolor) population ecology, creating genetic viability and maintaining gene flow between populations. The naturally recolonized cougar population in the Black Hills is at the edge of the species’ range in North America and completely surrounded by the grasslands of the Northern Great Plains. Our objective was to document dispersal movements and possible range expansion of subadult cougars captured within the Black Hills ecosystem of southwestern South Dakota and eastern Wyoming. Twenty-four (n ¼ 14 males, n ¼ 10 females) subadult cougars were captured in the Black Hills. Independence of cougars from females …
Survival And Harvest Characteristics Of Giant Canada Geese In Eastern South Dakota, 2000–2004, Charles D. Dieter, Jeffrey S. Gleason, Bobby J. Anderson, Spencer Vaa, Paul W. Mammenga
Survival And Harvest Characteristics Of Giant Canada Geese In Eastern South Dakota, 2000–2004, Charles D. Dieter, Jeffrey S. Gleason, Bobby J. Anderson, Spencer Vaa, Paul W. Mammenga
Natural Resource Management Faculty Publications
The population of giant Canada geese (Branta canadensis maxima) in eastern South Dakota has increased substantially since reintroduction efforts began in the 1960s. Breeding population estimates of Canada geese exceeded the population management objective of the South Dakota Game, Fish and Parks by the mid-1990s and has continued to increase at an estimated rate of 3 to 5% per year. Goose-related crop damage complaints have also increased. In 1996, a September hunting season (September 1 to 15) was implemented in 10 counties in eastern South Dakota and was expanded in 2000 to include most of eastern South Dakota. …
2010 Winter Wheat Variety Yield Results And Planting Tips, John Rickertson, Thandiwe Nleya, Bill Berzonsky, Larry Osborne
2010 Winter Wheat Variety Yield Results And Planting Tips, John Rickertson, Thandiwe Nleya, Bill Berzonsky, Larry Osborne
SDSU Extension Extra Archives
Conditions were very dry for planting last September for the western and central part of the state. And while there were good rains in early October, the cold temperatures led to a slow start for the wheat. Fortunately November was warmer than average, which allowed most locations to get decent fall growth. The northwest part of the state suffered a hard freeze on May 8th causing some freeze injury to the crop. Spring and early summer conditions were wet for most of the state, favoring increased disease pressure. The north central part of South Dakota was dry in June, which …
Proteomic Analysis Of Shoot Tissue During Photoperiod Induced Growth Cessation In V. Riparia Michx. Grapevines, Kim J. Victor, Anne Fennell Dr, Jerome Grimplet
Proteomic Analysis Of Shoot Tissue During Photoperiod Induced Growth Cessation In V. Riparia Michx. Grapevines, Kim J. Victor, Anne Fennell Dr, Jerome Grimplet
Agronomy, Horticulture and Plant Science Faculty Publications
Background: Growth cessation, cold acclimation and dormancy induction in grapevines and other woody perennial plants native to temperate continental climates is frequently triggered by short photoperiods. The early induction of these processes by photoperiod promotes winter survival of grapevines in cold temperate zones. Examining the molecular processes, in particular the proteomic changes in the shoot, will provide greater insight into the signaling cascade that initiates growth cessation and dormancy induction. To begin understanding transduction of the photoperiod signal, Vitis riparia Michx. grapevines that had grown for 35 days in long photoperiod (long day, LD, 15 h) were subjected to either …
Soybean Diseases: A Pictorial Guide For South Dakota, Lawrence E. Osborne, Darrel Deneke
Soybean Diseases: A Pictorial Guide For South Dakota, Lawrence E. Osborne, Darrel Deneke
SDSU Extension Circulars
This publication was assembled to provide growers and crop managers in South Dakota and nearby states with easy-to-use and handy diagnostic information for a number of major or potentially problematic soybean diseases. It is intended to provide a starting point for management decisions.
Consumer Return Chronology Alters Recovery Trajectory Of Stream Ecosystem Structure And Function Following Drought, Justin N. Murdock, Keith B. Gido, Walter K. Dodds, Katie N. Bertrand, Matt R. Whiles
Consumer Return Chronology Alters Recovery Trajectory Of Stream Ecosystem Structure And Function Following Drought, Justin N. Murdock, Keith B. Gido, Walter K. Dodds, Katie N. Bertrand, Matt R. Whiles
Natural Resource Management Faculty Publications
Consumers are increasingly being recognized as important drivers of ecological succession, yet it is still hard to predict the nature and direction of consumer effects in nonequilibrium environments. We used stream consumer exclosures and large outdoor mesocosms to study the impact of macroconsumers (i.e., fish and crayfish) on recovery of intermittent prairie streams after drying. In the stream, macroconsumers altered system recovery trajectory by decreasing algal and macroinvertebrate biomass, primary productivity, and benthic nutrient uptake rates. However, macroconsumer influence was transient, and differences between exclosures and controls disappeared after 35 days. Introducing and removing macroconsumers after 28 days resulted mainly …
The 2005/06 South Dakota Grain Marketing Patterns Study: A Grain Elevator Survey Report, Bashir Qasmi, Yonas Hamda, Scott Fausti
The 2005/06 South Dakota Grain Marketing Patterns Study: A Grain Elevator Survey Report, Bashir Qasmi, Yonas Hamda, Scott Fausti
Economics Research Reports
U.S. agriculture is going through a transition and agricultural policies are being modified to make production of farm commodities more responsive to market forces. In this competitive environment, efforts on the part of commodity groups for market development are becoming increasingly important. However, in order to devise any market development plan for a commodity, the understanding of the present status of the marketing system is important. At a minimum, one needs to know the methods of buying and selling, types of buyers, shipment destinations, and transportation modes for the commodity. Corn, soybeans, wheat, and sunflower seeds are the most important …
West River Ag Center Crops And Soils Research Annual Progress Report, 2009, Agricultural Experiment Station
West River Ag Center Crops And Soils Research Annual Progress Report, 2009, Agricultural Experiment Station
Agricultural Experiment Station and Research Farm Annual Reports
This is the 2009 annual progress report of the West River Crops Soils Research and Extension Center, South Dakota Agricultural Experiment Station. This report includes a weather summary, winter wheat variety trials, spring and durum wheat variety trials, oat and barley variety trials, safflower variety trials, field pea variety trials, chickpea variety trials, soybean variety testing, forage trials, management practices, reduced tillage practices, and tillage practices.
Twin Screw Extrusion Of Ddgs-Based Aquaculture Feeds, S. Kannadhason, Kurt A. Rosentrater, K. Muthukumapappan, Michael L. Brown
Twin Screw Extrusion Of Ddgs-Based Aquaculture Feeds, S. Kannadhason, Kurt A. Rosentrater, K. Muthukumapappan, Michael L. Brown
Natural Resource Management Faculty Publications
Six isocaloric (3.65 kcal/g), isonitrogenous (35% dry-basis [db] protein), ingredient blends were prepared with 0, 17.5, 20, 22.5, 25, and 27.5% distiller’s dried grains with solubles (DDGS) and other ingredients (soybean meal, corn, fish meal, whey, soybean oil, vitamin and mineral mix). The blends were moisture balanced to 15% db, then extruded in a twin screw extruder using a 2 mm die at 190 rpm, and a 3 mm die at 348 rpm. Analyses of the extrudates included moisture content, expansion ratio, unit density, bulk density, sinking velocity, color (L*, a*, and b*), water absorption, water solubility, and pellet durability …
Sdsu Irm‐Spa: Trend Analysis 2002 – 2008, E.M. Mousel
Sdsu Irm‐Spa: Trend Analysis 2002 – 2008, E.M. Mousel
South Dakota Beef Report, 2010
Production and financial efficiency data from cow‐calf producers in eastern South Dakota was analyzed. Data was collected from 2002‐2008; each herd represented one observation. The database consisted of 210 production observations and 140 financial observations. Analysis of production efficiency data was conducted according to the SPA guidelines, developed by the IRM Coordinating Committee of the National Cattlemen’s Beef Association. Financial data was collected using the SPA system, in accordance with the SPA guidelines as well information collected from IRS Schedule F to calculate operating expense ratio (OER). Overall trends suggested that following the market peak of 2005, production efficiency has …
Sdsu Irm‐Spa 2008 Summary Report, E.M. Mousel
Sdsu Irm‐Spa 2008 Summary Report, E.M. Mousel
South Dakota Beef Report, 2010
Integrated Resource Management (IRM) is a method of managing the farm as a whole, rather than as separate, unrelated enterprises. Using this method, resources can be utilized to maximize efficiency and profitability of an operation. A key component of the IRM approach to management is Standardized Performance Analysis (SPA). The SPA is a cow‐calf performance analysis system that is used to integrate production and financial data using a standardized performance analysis procedure to identify production management and financial inefficiencies in the cow‐calf enterprise. These performance values can be used to identify opportunities for change. Comparing results between production years as …
Effect Of Maternal Nutrition On Fetal Adipocyte Development, T.D. Jennings, K.R. Underwood, A.E. Wertz-Lutz, A.D. Weaver
Effect Of Maternal Nutrition On Fetal Adipocyte Development, T.D. Jennings, K.R. Underwood, A.E. Wertz-Lutz, A.D. Weaver
South Dakota Beef Report, 2010
The objective of this experiment was to determine the effects of maternal nutrition on the expression of genes in fetal tissues. Genes of interest were selected because each has been demonstrated previously to influence body composition. Twenty‐two Angus‐cross bred heifers (BW = 1161 ± 19 lbs) randomly were assigned to three dietary treatments. Maternal dietary treatments were formulated and intake was controlled to provide 150% (HIGH), 100% (INT), and 80% (LOW) of maintenance energy requirements for growing pregnant Angus heifers (NRC, 2000). Heifers were on dietary treatment from d 85 to d 180 of gestation, at which point fetuses were …
Effects Of Dietary Energy Source And Corn Oil Inclusion On Plasma Metabolite And Lipid Profiles And Intramuscular Adipose And Muscle Accretion In Beef Cattle, A.E. Wertz-Lutz, R.H. Pritchard, D.C. Mcfarland, K.W. Burns
Effects Of Dietary Energy Source And Corn Oil Inclusion On Plasma Metabolite And Lipid Profiles And Intramuscular Adipose And Muscle Accretion In Beef Cattle, A.E. Wertz-Lutz, R.H. Pritchard, D.C. Mcfarland, K.W. Burns
South Dakota Beef Report, 2010
The objectives of this research were to evaluate 1) fluctuations in plasma metabolites and lipid profiles and 2) differences in satellite cell differentiation and proliferation in cattle with differences in marbling relative to total fatness. Dietary starch is thought to optimize accumulation of marbling. In this experiment, readily fermentable fiber or corn oil were substituted for starch from corn in an effort to alter adipose tissue accretion. Crossbred yearling steers (n = 144) were used in a 131 d finishing trial. The trial was designed as a 3 x 2 factorial arrangement of dietary energy source by corn oil inclusion. …
The Presence Of Growth Hormone Secretagogue Receptor (Ghrelin Receptor) In Metabolic Tissues Of Beef Cattle With Differences In Composition Of Gain, J.S. Jennings, J.A. Clapper, A.D. Weaver, A.E. Wertz-Lutz
The Presence Of Growth Hormone Secretagogue Receptor (Ghrelin Receptor) In Metabolic Tissues Of Beef Cattle With Differences In Composition Of Gain, J.S. Jennings, J.A. Clapper, A.D. Weaver, A.E. Wertz-Lutz
South Dakota Beef Report, 2010
Beef steers (n = 72) of similar age, weight (651 ± 3.1 lb), and genetic (Angus crossbred) background were used to determine the effects of growing diet composition (high‐forage vs. high‐concentrate) on the abundance of growth hormone secretagogue receptor (GHS‐R or ghrelin receptor) in metabolically important tissues of beef cattle. At trial initiation (d 0), 8 steers were harvested for initial carcass composition. The remaining 64 steers were allotted, by weight, to pen and treatment was assigned randomly. Treatments were 1) a high‐forage diet fed during the growing period (116 d) followed by a high‐concentrate diet during the finishing period …
Effect Of Supplemental Fat From Dried Distillers Grains With Solubles Or Corn Oil On Nutrient Digestibility, A.J. Bartosh, A.E. Wertz-Lutz, C.L. Wright
Effect Of Supplemental Fat From Dried Distillers Grains With Solubles Or Corn Oil On Nutrient Digestibility, A.J. Bartosh, A.E. Wertz-Lutz, C.L. Wright
South Dakota Beef Report, 2010
The objective of this experiment was to determine the effects of supplemental fat from either dried distillers grains with solubles (DDGS) or raw corn oil on the digestibility of nutrients and long chain fatty acids. When compared to corn grain and grass hay, DDGS have considerably greater levels of fat, which may negatively influence rumen microbes and nutrient digestibility. Six medium‐framed crossbred steers (initial BW = 602 ± 23.6 lb) were used in a Latin square design to determine apparent total tract digestibility of diets formulated with no supplemental fat or supplemental fat from either DDGS or raw corn oil. …
Influence Of Dietary Corn Oil On Production Efficiencies And Adipose And Muscle Accretion In Beef Cattle, R.H. Pritchard, A. Wertz-Lutz, K.W. Bruns, D.M. Wulf
Influence Of Dietary Corn Oil On Production Efficiencies And Adipose And Muscle Accretion In Beef Cattle, R.H. Pritchard, A. Wertz-Lutz, K.W. Bruns, D.M. Wulf
South Dakota Beef Report, 2010
The objective of this research was to determine shifts in metabolism associated with differences in marbling relative to total fatness in beef carcasses. Dietary starch is thought to optimize accumulation of intramuscular adipose (IAT). The two mechanisms used to alter IAT accumulation were to substitute either readily fermentable fiber or corn oil for starch from corn. The model involved yearling steers (n = 144) during a 131 d finishing phase. The control diet contained 8.5% roughage and 81.2% corn. A higher fiber finishing diet included substitution of chopped, high moisture ear corn (43.7%) and dried corn gluten feed (18.2%) for …
Digestion And Metabolism Of Diets Containing Increasing Levels Of Corn Germ, R.H. Pritchard, G.B. Kleinhans
Digestion And Metabolism Of Diets Containing Increasing Levels Of Corn Germ, R.H. Pritchard, G.B. Kleinhans
South Dakota Beef Report, 2010
A novel germ fraction is being generated by the BFrac™4 process. The 20% fat, dry, flowable material is a potential source of concentrated energy to include in Northern Plains feedlot diets. A metabolism study with wethers was conducted to evaluate how ruminants would respond to this additional fat intake in finishing diets. Total collections of urine and feces were conducted on 23 wethers fed pelleted, high‐corn content, iso‐nitrogenous diets that included 0, 10, 20, or 30% germ. Each 6‐d collection period followed 21 d adaptation periods. Increasing BFrac™ germ content caused (P < 0.01) an increase in DMI and a linear (P < 0.001) decrease in DM digestibility, probably due to the effect of DMI. There was a quadratic (P < 0.01) increase in EE digestibility, plateauing at 10% germ. Dietary DE, kcal/g declined linearly (P < 0.01) but DE intake (kcal/d) increased linearly (P < 0.05) because of higher DMI. There was no (P > 0.15) dietary effect on N digestibility, but there …
Use Of De‐Oiled Dried Distillers Grains As A Source Of Crude Protein In Finishing Cattle Diets, R.H. Pritchard
Use Of De‐Oiled Dried Distillers Grains As A Source Of Crude Protein In Finishing Cattle Diets, R.H. Pritchard
South Dakota Beef Report, 2010
A de‐oiled distillers grains (dDGS) product was evaluated as a primary supplemental CP source in finishing diets. The 3 dietary treatments used were: SBM/Urea) as a control, typical of feedlot diets; dDGS) where dDGS replaced all of the SBM and some urea; and dDGS/SBM) where a 90% dDGS/10% SBM (N basis) blend was fed iso‐nitrogenous to the other diets. Eighteen pens of 8 steers each were fed these finishing diets for 132 d. There were no differences in steer performance or carcass traits attributable to diet. The dDGS product can be used effectively to replace oilseed meals and some of …
Effect Of Standing Estrus Prior To An Injection Of Gnrh On Steriodogenic Enzyme Expression In Luteal Tissue, Kaycee Gebhart
Effect Of Standing Estrus Prior To An Injection Of Gnrh On Steriodogenic Enzyme Expression In Luteal Tissue, Kaycee Gebhart
The Journal of Undergraduate Research
Cows detected in estrus around the time of fixed-time AI had increased pregnancy success and progesterone concentrations. Additionally, GnRH following onset of estrus influenced LH pulse frequency and CL formation/function. Therefore our objective was to determine steriodogenic enzyme expression within luteal tissue of cows that were or were not detected in standing estrus prior to an injection of GnRH. Cows were synchronized with the CO-Synch protocol (day -9 100 mg GnRH; day -2 25 mg PGF2α; day 0 100 mg GnRH). Estrus was detected with the HeatWatch system. Location and size of the ovulatory follicle was determined on day 0 …
The Journal Of Undergraduate Research: Volume 08
The Journal Of Undergraduate Research: Volume 08
The Journal of Undergraduate Research
This is the complete issue of the South Dakota State University Journal of Undergraduate Research, Volume 8.
Sdsu Dairy Digest 2010, South Dakota State University Dairy Club
Sdsu Dairy Digest 2010, South Dakota State University Dairy Club
Dairy Digest
No abstract provided.
Department Of Economics Publication List 2010, Penny Stover
Department Of Economics Publication List 2010, Penny Stover
Economics Pamphlet Series
This compilation lists published works authored by Department of Economics faculty members and other staff working on projects funded through the Department of Economics. Publications resulting from their research and academic activities are indexed by author at the end of this pamphlet for easy access by the public. The articles were published between January 1, 2009 and December 31, 2009.
The Jackrabbit Dairy Review, Vikram Mistry
The Jackrabbit Dairy Review, Vikram Mistry
The Jackrabbit Dairy & Food Review
No abstract provided.