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Articles 1 - 30 of 35
Full-Text Articles in Physical Sciences and Mathematics
Kentucky Forage Spokesperson Contest, Kentucky Forage And Grassland Council
Kentucky Forage Spokesperson Contest, Kentucky Forage And Grassland Council
Kentucky Grazing Conference
No abstract provided.
Can We Graze 300+ Days?, Glen Aiken
Can We Graze 300+ Days?, Glen Aiken
Kentucky Grazing Conference
Dependence on stored feeds during the winter months has been necessary in order to maintain body condition and meet nutrient requirements of cattle herds; unfortunately, cost of stored feeds typically are a major part of the farm budget. We know, all too well, that hay shortages and unstable feed ingredient markets have reduced profit potential in cattle production. This has further placed higher demands on supplies of co-product feeds to cause prices of these alternative feeds to rise and make them less cost effective. There will likely be less reliance on concentrate and co-product feeds as the forage-based livestock industry …
Pastures For Horses, Robert Coleman
Pastures For Horses, Robert Coleman
Kentucky Grazing Conference
The horse evolved as a grazing animal. In order to consume enough forage to meet the horses’ nutritional needs a significant amount of time would be spent each day grazing. The pattern of selecting forage-moving to the next area starting to graze again can easily translate into 14 to 16 hours of grazing activity each day. The level of grazing activity will also be affected by the available forage and the daily access to pasture.
Pastures For Goats And Sheep, Greg Brann
Pastures For Goats And Sheep, Greg Brann
Kentucky Grazing Conference
Pasture for sheep is not that different than that for cattle but pasture for goats is very different. Sheep are grazers like cattle whereas goats are browsers like deer. Even though grass and clover are not a goats preference if all of the forage present is grass and clover goats will eat it. Due to goats and sheep being more prey animals than cattle they don’t like to wade off into tall vegetation, also it takes more energy for them to move through tall growth. Many plants that we traditionally consider weeds become desirable forbs when goats or sheep are …
The Role Of Weed Control In Profitable Pastures, Scott Flynn, Pat Burch
The Role Of Weed Control In Profitable Pastures, Scott Flynn, Pat Burch
Kentucky Grazing Conference
Pasture weeds compete for resources such as space, water, and nutrients. This competition reduces forage yield which in turn reduces the carrying capacity of a pasture. Although herbicide applications are needed to gain a quick upper hand on weed control most producers are deterred due to cost, the potential loss of pasture legumes, labor, or the belief that herbicide applications are required frequently to keep weed population under control. However, herbicide use in pastures should not be looked at in this manner but instead as an investment that can pay for itself very quickly and easily, and be long-term especially …
Role Of Legumes In Pastures, Garry D. Lacefield
Role Of Legumes In Pastures, Garry D. Lacefield
Kentucky Grazing Conference
Successful livestock production is dependent on forage programs which supply large quantities of adequate quality, homegrown feed. A major percentage of the feed units for beef (83%) and dairy (61%) cattle come from forages. In addition, forages supply an estimated 91%, 72%, 15% and 99% of the nutrients consumed by sheep and goats, horses, swine and ruminant wildlife, respectively.
(How I Think About) Kentucky's Pastures: One Of Kentucky's Untapped Resources, Jimmy C. Henning
(How I Think About) Kentucky's Pastures: One Of Kentucky's Untapped Resources, Jimmy C. Henning
Kentucky Grazing Conference
One of the privileges of old(er) age is the prerogative to take liberties with assigned tasks. At the risk of confusing producers and offending more scientifically-current forage scientists, the topic of pasture as an untapped resource presented an opportunity to address task from an unexpected angle. Certainly, Kentucky’s pastures are a resource with untapped potential. But the idea that their value as a resource depends on how we think about them is one worth pursuing.
Foreword And Kfgc Award Winners [2013], Garry D. Lacefield, Christi L. Forsythe
Foreword And Kfgc Award Winners [2013], Garry D. Lacefield, Christi L. Forsythe
Kentucky Grazing Conference
No abstract provided.
Is Security Sustainable?, Jeremy W. Crampton
Is Security Sustainable?, Jeremy W. Crampton
Geography Faculty Publications
No abstract provided.
Photo Highlights From The 33rd Kentucky Alfalfa Conference, Krista Cotton
Photo Highlights From The 33rd Kentucky Alfalfa Conference, Krista Cotton
Kentucky Alfalfa and Stored Forage Conference
No abstract provided.
Finishing Beef On Alfalfa, Todd Powell
Finishing Beef On Alfalfa, Todd Powell
Kentucky Alfalfa and Stored Forage Conference
Powell Farms started in 1996 with 15 acres of Alfalfa hay intended for cow/calf feed. A neighbor and his friends bought every bale that year. Over the next 14 years the only alfalfa hay our cows got to eat was when a cutting got wet and was rolled. As with any business when the economy starts to take a downward trend, it is wise to start looking for new and innovative ways to market your product.
Making And Marketing Hay For The Horse Industry, Todd Clark
Making And Marketing Hay For The Horse Industry, Todd Clark
Kentucky Alfalfa and Stored Forage Conference
No abstract provided.
Fertilizer: How Much Is In Each Bale?, Dennis Hancock
Fertilizer: How Much Is In Each Bale?, Dennis Hancock
Kentucky Alfalfa and Stored Forage Conference
What do you see when you look at a bale? Certainly, many would say it is a source of feed for our livestock. Others see a commodity that is sold to their customers. These are the most important aspects of any forage. But, there is one other intrinsic value worth noting… its nutrient content. In a sense, it is a bale of fertilizer.
Our Experience With Roundup Ready Alfalfa, Clayton Geralds
Our Experience With Roundup Ready Alfalfa, Clayton Geralds
Kentucky Alfalfa and Stored Forage Conference
We raise approximately 500 acres of alfalfa with approximately 175 seeded to Roundup Ready varieties. We established our first field in 2006 and a second in 2007. Roundup Ready alfalfa was not available for additional seedings until 2011. We have seeded over 100 additional acres in 2011 and 2012.
Key To Success When Harvesting Alfalfa As Baleage, S. Ray Smith
Key To Success When Harvesting Alfalfa As Baleage, S. Ray Smith
Kentucky Alfalfa and Stored Forage Conference
Alfalfa is an excellent forage for high-producing cows and universally considered one of the highest-quality forages. Cows efficiently use the high levels of protein, calcium and high-quality fiber in alfalfa for producing milk and meat. The palatability of alfalfa is high, especially when the leaves are maintained during harvest. Typically, cows will eat more alfalfa than grass because the fiber content is usually lower in alfalfa. Harvesting alfalfa as baleage vs. hay greatly improves the chances maintaining high quality because there is less leaf loss and less loss of soluble carbohydrates. The most important factor is harvesting high quality alfalfa …
Alfalfa For Grazing, Garry D. Lacefield
Alfalfa For Grazing, Garry D. Lacefield
Kentucky Alfalfa and Stored Forage Conference
High grain prices, increasing nitrogen prices, droughts, need for higher quality pasture plants and improved alfalfa varieties have all contributed to a greater interest in and opportunity for alfalfa as a grazing crop.
Foreword And Recipients Of Kentucky Alfalfa Awards [2013], Garry D. Lacefield, Christi L. Forsythe
Foreword And Recipients Of Kentucky Alfalfa Awards [2013], Garry D. Lacefield, Christi L. Forsythe
Kentucky Alfalfa and Stored Forage Conference
No abstract provided.
Seismic Velocity Database For The New Madrid Seismic Zone And Its Vicinity, Qian Li, Edward W. Woolery, Matthew M. Crawford, David M. Vance
Seismic Velocity Database For The New Madrid Seismic Zone And Its Vicinity, Qian Li, Edward W. Woolery, Matthew M. Crawford, David M. Vance
Information Circular--KGS
Over the last 20 years, researchers at the University of Kentucky have collected seismic-reflection and refraction data to characterize seismic velocity models of the soil-sediment overburden throughout the central United States. The data are in different forms, such as published reports, theses, and journal articles, and in digital form. In order to construct a unified database for easier management, access, and use, Microsoft Access was used to design the data structure and field properties. The database consists of four tables with unified field names, data type, and units. An ArcGIS geodatabase with the same data structure as the Access database …
Joint Orientations In The Red River Gorge Geological Area, East-Central Kentucky, Steven L. Martin
Joint Orientations In The Red River Gorge Geological Area, East-Central Kentucky, Steven L. Martin
Information Circular--KGS
The Red River Gorge Geological Area and Clifty Wilderness Area of Daniel Boone National Forest and Natural Bridge State Park in east-central Kentucky provide an excellent opportunity to observe and study differential weathering and erosion, mass wasting, and jointing in the development of cliffs, rock shelters, and natural arches. Joints in the study area have varying orientations, but dominant northeast- and northwest-striking orientations are prevalent. Jointing in the study area is related to unloading of overburden and regional tectonic stresses. Unloading joints result from removal of overburden from a rock mass, and orientations of joints are controlled by either residual …
Kentucky Geological Survey Procedures For Groundwater Tracing Using Fluorescent Dyes, James C. Currens
Kentucky Geological Survey Procedures For Groundwater Tracing Using Fluorescent Dyes, James C. Currens
Information Circular--KGS
Karst terrain often develops from an ancestral landscape of surface-flowing streams, which leaves behind a relict pattern of the surface watershed divides. If caves only developed in ancestral watersheds, then groundwater tracing, for the purpose of groundwater basin mapping, would be unnecessary. But lithologic, structural, and hydrologic factors conspire to ensure that some caves extend headward faster than their neighbors and encroach upon adjacent groundwater basins to pirate drainage under the original surface divides. In many areas, groundwater basin boundaries have been significantly reorganized, to the point that there is little relationship to the ancestral surface watershed boundaries.
Distribution And Impacts Of Petroleum Hydrocarbons In Louisiana Tidal Marsh Sediments Following The Deepwater Horizon Oil Spill, Rachel S. Hatch
Distribution And Impacts Of Petroleum Hydrocarbons In Louisiana Tidal Marsh Sediments Following The Deepwater Horizon Oil Spill, Rachel S. Hatch
Theses and Dissertations--Earth and Environmental Sciences
Following the 2010 Deepwater Horizon (DWH) spill, sediment cores were analyzed from marshes at various levels of oiling to determine how deeply oil penetrated sediment in these marsh environments, and if at these sites it had quantifiably affected benthic ecosystems. Minimum mixing depths were determined from penetration of the lithogenic radionuclide 234Th, which ranged from 0.25 to 4.5 cm. Sediment accumulation rates were determined using 210Pb, with verification from 137Cs in selected cores. Lead-210 profiles revealed long-term (decadal) mixing. Bay Jimmy, Louisiana was significantly affected by the DWH oil spill, as indicated by total polycyclic aromatic hydrocarbon …
Middle And Late Devonian New Albany Shale In The Kentucky Geological Survey Marvin Blan No. 1 Well, Hancock County, Kentucky, Brandon C. Nuttall
Middle And Late Devonian New Albany Shale In The Kentucky Geological Survey Marvin Blan No. 1 Well, Hancock County, Kentucky, Brandon C. Nuttall
Report of Investigations--KGS
A 30-ft section of core was recovered in the Grassy Creek Member of the New Albany Shale in the Kentucky Geological Survey Marvin Blan No. 1 well, Hancock County, Ky. (permit 104925, API No. 16091013960000). Analysis characterized the New Albany Shale as a regional seal for preventing vertical migration of carbon dioxide stored in deeper zones, as a natural gas reservoir, and for its potential for enhanced gas recovery and sequestration of carbon dioxide. A show of natural gas at the top of the New Albany Shale was encountered during drilling. Core was recovered in an aluminum sleeve cut into …
Abiotic Nitrate And Nitrite Reactivity With Iron Oxide Minerals, Prakash Dhakal
Abiotic Nitrate And Nitrite Reactivity With Iron Oxide Minerals, Prakash Dhakal
Theses and Dissertations--Plant and Soil Sciences
Under iron (Fe3+)-reducing conditions where aqueous Fe2+ and unreduced solid Fe3+-oxides commonly coexist, soil Fe2+ oxidation has been shown to be coupled with nitrate (NO3-) reduction. One possible secondary reaction is the involvement of NO3- and nitrite (NO2-) with Fe-oxide minerals found in many natural environments. Yet, spectroscopic measurements and kinetic data on reactivity of NO3- and NO2- with Fe-containing oxide minerals such as goethite (a-FeOOH), and magnetite (Fe3O4) are not found in the literature. The reactivity of …
Shear-Wave Imaging And Birefringence In A Complex Near-Surface Geological Environment, Ali Z. Almayahi
Shear-Wave Imaging And Birefringence In A Complex Near-Surface Geological Environment, Ali Z. Almayahi
Theses and Dissertations--Earth and Environmental Sciences
Multiple geophysical and geological data sets were compiled, reprocessed, and interpreted using state-of-the-art signal processing and modeling algorithms to characterize the complex post-Paleozoic geology that overlies the southwestern projection of the Fluorspar Area Fault Complex (FAFC) in western Kentucky. Specific data included 21.5 km of SH-wave seismic reflection, 1.5 km of P-wave seismic reflection, 2 km of electrical resistivity, vertical seismic profiles, Vp and Vs sonic-suspension logs, and 930 lithologic borehole logs. The resultant model indicates three general northeast–southwest-oriented fault zones pass through the study area as southwestern extensions of parts of the FAFC. These fault zones form two significant …
Factors Influencing The Establishment And Survival Of Native Hardwood Tree Seedlings Of The Kentucky Inner Bluegrass Blue Ash-Oak Savanna-Woodland, James D. Shaffer
Factors Influencing The Establishment And Survival Of Native Hardwood Tree Seedlings Of The Kentucky Inner Bluegrass Blue Ash-Oak Savanna-Woodland, James D. Shaffer
Theses and Dissertations--Biology
Historically, the Kentucky Inner Bluegrass blue ash-oak savanna-woodland was the primary ecosystem of the Inner Bluegrass Region (IBR) of Kentucky. After European settlement, the majority (>99%) of Bluegrass savanna was converted to agricultural and urban land uses. Currently remnant savanna tree species are failing to recruit. Therefore, a long-term restoration ecology project researching competition and disturbance on seedling establishment, survival, and growth has been established at Griffith Woods (the largest remaining savanna in Kentucky) in Harrison Co., KY. Fourteen native hardwood tree species (a total of 6,168 seedlings) have been experimentally planted. Light, soil, surrounding vegetation, and herbivory, factors …
Thermobarometry Of Metamorphosed Pseudotachylyte And Determination Of Seismic Rupture Depth During Devonian Caledonian Extension, North Norway, Susan E. Leib
Theses and Dissertations--Earth and Environmental Sciences
Crustal faulting has long been known as the source of shallow seismicity, and the seismogenic zone is the depth (3-15 km) within the crust that is capable of co-seismic slip, largely under brittle conditions. However, some continental seismicity occurs at depths >> 15 km. I performed thermobarometry of mylonitic pseudotachylyte to determine the P-T of a seismogenic extensional fault in the Caledonian Norwegian margin. Two shear zones (Eidsfjord and Fiskfjord) located in northern Norway exhibit brittle extension propagating into the ductile regime of the lower crust as evidenced by the presence of pseudotachylyte. Averages from Eidsfjord (653 ± 38°C and 570 …
Transformations, Bioavailability And Toxicity Of Manufactured Zno Nanomaterials In Wastewter, Sewwandi Rathnayake
Transformations, Bioavailability And Toxicity Of Manufactured Zno Nanomaterials In Wastewter, Sewwandi Rathnayake
Theses and Dissertations--Plant and Soil Sciences
In order to properly evaluate the ecological and human health risks of ZnO Manufactured nanomaterials (MNMs) released to the environment, it is critical to understand the likely transformation products in the wastewater treatment process and in soils receiving biosolids. To address this critical knowledge gap, we examined the transformation reactions of 30 nm ZnO MNMs in single component and multi-component systems, with phosphate and natural organic matter (NOM). We also assessed the influence of nano ZnO transformation on the bioavailability, and toxicity of ZnO transformation products to Triticum aestivum. The data revealed that ZnO MNMs react with phosphate at …
Modeling Of Co2-Water-Rock Interactions In A Mississippian Sandstone Reservoir Of Kentucky, Anne M. Schumacher
Modeling Of Co2-Water-Rock Interactions In A Mississippian Sandstone Reservoir Of Kentucky, Anne M. Schumacher
Theses and Dissertations--Earth and Environmental Sciences
This study examined CO2-water-rock interactions occurring during a carbon sequestration pilot test into a Mississippian oil reservoir in western Kentucky. New samples (n=62) and archived data, both collected from oil wells, were used to characterize the chemistry of formation waters from the Sugar Creek field in Hopkins County. In addition, core and cuttings samples (n=17) from the reservoir and overlying cap-rocks in, or near, the field were analyzed for bulk and clay mineralogy using X-ray diffraction. Electric logs were used to select sample intervals within the overlying cap-rocks and the center of the producing zones in the Jackson …
Spatio-Temporal Variability In Groundwater Discharge And Contaminant Fluxes Along A Channelized Stream In Western Kentucky, Ganesh N. Tripathi
Spatio-Temporal Variability In Groundwater Discharge And Contaminant Fluxes Along A Channelized Stream In Western Kentucky, Ganesh N. Tripathi
Theses and Dissertations--Earth and Environmental Sciences
Spatio-temporal variability in groundwater discharge and contaminant fluxes along a channelized stream in western Kentucky
Surface and groundwater discharges and contaminant fluxes can vary with time and space depending upon the hydrogeological processes and geological setting of the area of interest. This study examined a ~300-m-long, channelized reach of a first-order perennial stream, Little Bayou Creek, in the Coastal Plain of far western Kentucky during the period October 2010–February 2012. Along the study reach, springs discharge groundwater contaminated by the chlorinated organic compound trichloroethene (TCE) and radionuclide technetium-99 (99Tc) released as a result of past activities at the …
Modeling Bedrock Mining Hotspots Within The Ouachita National Forest, Arkansas, Stephanie H. Mehlhope
Modeling Bedrock Mining Hotspots Within The Ouachita National Forest, Arkansas, Stephanie H. Mehlhope
Theses and Dissertations--Geography
This study, concentrating on the Ouachita Mountain Range in western-central Arkansas, extends prior work on treethrows and their influence on soil development in the region by supplying a method of determining hotspots of bedrock mining by treethrow. Binary logistic regression analysis was employed to determine the abiotic and biotic factors that are highly correlated with the rate of bedrock detachment found in uprooted rootwads from three study sites within the Ouachita National Forest. The produced logistic regression models suggest topographic factors, tree specific characteristics, as well as the local geology and soil characteristics all have a significant effect upon the …