Open Access. Powered by Scholars. Published by Universities.®
- Institution
-
- University of Kentucky (4548)
- University of Nebraska - Lincoln (988)
- University of South Florida (370)
- Department of Primary Industries and Regional Development, Western Australia (343)
- Utah State University (262)
-
- Western Kentucky University (241)
- University of Arkansas, Fayetteville (188)
- University of Texas Rio Grande Valley (180)
- University of Colorado Law School (164)
- Old Dominion University (76)
- East Tennessee State University (66)
- University of Nevada, Las Vegas (57)
- Missouri University of Science and Technology (56)
- Montclair State University (56)
- Portland State University (53)
- Boise State University (52)
- TÜBİTAK (49)
- California Polytechnic State University, San Luis Obispo (48)
- South Dakota State University (48)
- University of North Dakota (47)
- Central Washington University (46)
- City University of New York (CUNY) (44)
- Western Michigan University (44)
- University of Northern Iowa (40)
- Louisiana State University (39)
- Wright State University (37)
- Fort Hays State University (36)
- Smith College (36)
- University of Minnesota Morris Digital Well (36)
- University of New Hampshire (36)
- Keyword
-
- Grazing (280)
- Western Australia (245)
- Climate change (151)
- Sheep (131)
- Soil (130)
-
- Cattle (117)
- Nitrogen (110)
- Pasture (103)
- Water quality (101)
- Forage (99)
- Drought (97)
- Geology (96)
- Groundwater (92)
- Intake (92)
- Grassland (91)
- Livestock (87)
- Biodiversity (86)
- Digestibility (85)
- Silage (83)
- Sustainability (83)
- Natural resources (82)
- Stocking rate (82)
- Phosphorus (78)
- Conservation (77)
- Forage quality (77)
- Grains and field crops (77)
- United States (77)
- Agriculture (74)
- Alfalfa (73)
- Grazing management (67)
- Publication Year
- Publication
-
- IGC Proceedings (1977-2023) (4103)
- United States Geological Survey: Staff Publications (354)
- International Journal of Speleology (229)
- Kentucky Alfalfa and Stored Forage Conference (147)
- School of Earth, Environmental, & Marine Sciences Faculty Publications (142)
-
- Theses and Dissertations (138)
- Mammoth Cave Research Symposia (133)
- Kentucky Grazing Conference (129)
- Electronic Theses and Dissertations (112)
- Graduate Theses and Dissertations (89)
- Department of Earth and Atmospheric Sciences: Faculty Publications (82)
- Memorandum (82)
- School of Natural Resources: Dissertations, Theses, and Student Research (81)
- Masters Theses (74)
- Faculty Publications (70)
- Resource management technical reports (68)
- Experimental Summaries - Plant Research (63)
- All Graduate Theses and Dissertations, Spring 1920 to Summer 2023 (62)
- School of Geosciences Faculty and Staff Publications (60)
- Journal of the Department of Agriculture, Western Australia, Series 4 (54)
- Masters Theses & Specialist Projects (52)
- United States Environmental Protection Agency: Publications (51)
- Turkish Journal of Earth Sciences (49)
- USF Tampa Graduate Theses and Dissertations (46)
- Bulletin of the University of Nebraska State Museum (1924–2023) (45)
- Bulletins 4000 - (43)
- Daugherty Water for Food Global Institute: Faculty Publications (43)
- United States Geological Survey: Publications (43)
- Journal of the Arkansas Academy of Science (40)
- National Drought Mitigation Center: Faculty Publications (39)
- Publication Type
- File Type
Articles 7441 - 7470 of 9404
Full-Text Articles in Entire DC Network
Early Neoproterozoic Origin Of The Metazoan Clade Recorded In Carbonate Rock Texture: Reply, Fritz Neuweiler, Elizabeth C. Turner, David J. Burdige
Early Neoproterozoic Origin Of The Metazoan Clade Recorded In Carbonate Rock Texture: Reply, Fritz Neuweiler, Elizabeth C. Turner, David J. Burdige
OES Faculty Publications
We (Neuweiler et al., 2009) used scanning electron microscopic, fluorescence spectroscopic, fluorescence microscopic, and thin-section analytical work from modern, Cretaceous, Silurian, and early Neoproterozoic reefal material to make a geological case for an early Neoproterozoic origin of animals. In a modern analogue for ancient petrographic textures, degradative calcification of the extracellular collagenous matrix (ECM) of a modern siliceous sponge can be directly observed (Neuweiler et al., 2007).
Zinc And Copper Isotopes As Tracers Of Anthropogenic Contamination In A Sediment Core From An Urban Lake, Anita Thapalia
Zinc And Copper Isotopes As Tracers Of Anthropogenic Contamination In A Sediment Core From An Urban Lake, Anita Thapalia
Open Access Theses & Dissertations
Concentration data alone are often insufficient to resolve metal sources. This study applies stable Zn and Cu isotopes to fingerprint and track the sources of these metals in a sediment core from Lake Ballinger near Seattle, Washington, USA. The base of the Lake Ballinger core pre-dates settlement in the region, while the upper sections record the impact of atmospheric emissions from the nearby Tacoma smelter, as well as Cu and Zn inputs from urban sources. δ66Zn and δ65Cu varied by 0.42 / and 0.29 /, respectively, over the >300 year core record. Isotopic changes were correlated …
Detection Of An So2 Plume Over Sapporo, Japan From The Eruption Of Mt. Kasatochi Using A Balloon Sounding Technique, Gary A. Morris, Jun Hirokawa, Masatomo Fujiwara, Fumio Hasebe, Keisuke Ishida, Nicholay Krotkov, Mark R. Schoeberl, Walter Komhyr, Barry Lefer, James Flynn
Detection Of An So2 Plume Over Sapporo, Japan From The Eruption Of Mt. Kasatochi Using A Balloon Sounding Technique, Gary A. Morris, Jun Hirokawa, Masatomo Fujiwara, Fumio Hasebe, Keisuke Ishida, Nicholay Krotkov, Mark R. Schoeberl, Walter Komhyr, Barry Lefer, James Flynn
Physics and Astronomy Faculty Presentations
During the month of August 2008, 10 ozonesondes were launched from Hokkaido University in Sapporo, Japan as part of a study to examine regional pollution during the Olympic period. Seven of these soundings included a second instrument with a filter designed to remove SO2 from the intake air stream. SO2 interferes with the normal chemistry of the electrochemical cell (ECC) method for ozone detection, with the net result being that each molecule of SO2 registers as minus one molecule of O3. Thus the unfiltered sonde reports [O3] - [SO2] while the filtered sonde reports [O3]. Laboratory tests prior to launch …
Effects Of Olfactory And Visual Predators On Nest Success And Nest-Site Selection Of Waterfowl In North Dakota, Jennifer Borgo
Effects Of Olfactory And Visual Predators On Nest Success And Nest-Site Selection Of Waterfowl In North Dakota, Jennifer Borgo
Green Canyon Environmental Research Area, Logan Utah
No abstract provided.
Atrazine Contamination And Suspended Sediment Transport Within Logsdon River, Mammoth Cave, Kentucky, Julie Eileen Schenck Brown
Atrazine Contamination And Suspended Sediment Transport Within Logsdon River, Mammoth Cave, Kentucky, Julie Eileen Schenck Brown
Masters Theses & Specialist Projects
Understanding the potential for karst aquifer contamination by sediment-sorbed pesticides is important for cave conservation efforts in agricultural landscapes. Flow rate, water quality parameters and suspended sediment concentrations were measured in Logsdon River, a ~10km karst conduit within the Turnhole Spring Groundwater Basin of Mammoth Cave National Park to determine characteristics of storm-period transport of sediment-sorbed atrazine through a conduit-flow karst aquifer.
Analysis of two independent precipitation events occurring in the Spring of 2008 from May 2-4 and May 27-29 demonstrated the rapid response of the Logsdon River to precipitation events with detections of atrazine increasing during the initial turbidity …
Solarization Effects On Chemical Properties Of Soils Under Kudu (Pueraria Montana) Invasion, Nicole Gilbert
Solarization Effects On Chemical Properties Of Soils Under Kudu (Pueraria Montana) Invasion, Nicole Gilbert
All Theses
Solarization is an effective method for managing small areas with kudzu (Pueraria montana) invasions that may alter soil chemical properties. Conducted from 2005 to 2007 at the Clemson University Experimental Forest in Clemson, South Carolina on a Cecil clay loam (fine, kaolinitic, thermic Typic Kanhapludult), this study compares soil chemical properties under thermally-treated and non-treated plots at different depths invaded by Kudzu.
The experimental factors of treatment and depth were arranged in a factorial treatment design with 15 treatments arranged in a split plot design. The five thermal treatments were the whole plot factors which were arranged in a randomized …
Occurrence Of Digenean Larvae In Freshwater Snails In The Ruvu Basin, Tanzania, G. Nkwengulila, E. S. P. Kigadye
Occurrence Of Digenean Larvae In Freshwater Snails In The Ruvu Basin, Tanzania, G. Nkwengulila, E. S. P. Kigadye
Tanzania Journal of Science
A survey was carried out on digenean larvae infecting freshwater snails in five habitats in Dar es Salaam, Ruvu and Morogoro. 9424 snails belonging to 12 species from five families were examined for digenean infection from July 1996 – June 1997. 20 morphologically distinguishable cercariae were recovered. Multiple infections were not recorded. While the general prevalence of digeneans in snails was low (3.5%), variations occurred between seasons, among habitats and snail host species. Prevalence was high during the dry season but low in the rain season. Among habitats, highest prevalence was recorded at Kinondoni pond and lowest at Ruvu ponds, …
Supplementing Cattle On Pasture: When, What And How Much?, Roy Burris
Supplementing Cattle On Pasture: When, What And How Much?, Roy Burris
Kentucky Grazing Conference
The biggest advantage of maintaining cattle in the southeast is our ability to grow forages. It is generally an economic advantage to make maximum use of our forage and then supplement only when needed to meet our production goals. Judicious use of extra nutrition to grazing cattle can allow us to meet an objective which was best stated by Hoveland in 1986:
“Our objective is to maintain pasture at the highest quality that the environment will allow and efficiently convert as much of the pasture as possible into saleable animal product.”
Fencing And Watering Systems: Simpler Is Better, Ralph Quillin
Fencing And Watering Systems: Simpler Is Better, Ralph Quillin
Kentucky Grazing Conference
Sustainability and Grazing Management have taken on a new importance in the Americana farm community. The key components of the sustainable approach, profitability, agronomic, social and ecological responsibility and quality of life are becoming obtainable goals for this and future farming generations.
Practical Grazing Management And Feed Strategies To Alleviate Fescue Toxicosis, Glen Aiken
Practical Grazing Management And Feed Strategies To Alleviate Fescue Toxicosis, Glen Aiken
Kentucky Grazing Conference
Tall fescue grown in Kentucky is productive and persistent and that is why the state has 5 million acres of the stuff! Fescue has tolerances to drought, low fertility, and overgrazing that are attributed to a fungal endophyte which infects most tall fescue plants. Unfortunately, these advantages of tall fescue that livestock producers appreciate are offset by reduced calving percentages and calf weight gains caused by consumption of ergot alkaloids produced by the endophyte. Ergot alkaloids affect the physiology of cattle to cause elevation in body temperature, reduced sweating, retention of winter hair coats and uncontrollable growth of summer hair …
Herbicide Options For Pasture Weed Control, Jonathan D. Green
Herbicide Options For Pasture Weed Control, Jonathan D. Green
Kentucky Grazing Conference
Weeds have become more evident and problematic in grazed pastures as forage and livestock production systems have intensified. As animals consume the more desirable and palatable plant species in pastures, weedy plants become more abundant. In particular, animals tend to avoid grazing plants which contain thorns, prickly spines, or are unpalatable making some pastures less productive. In fact, many of the more problematic plants observed in Kentucky’s grazed pastures possess these characteristics including thistles, spiny amaranth (spiny pigweed), horsenettle, common cocklebur, tall ironweed, and buttercups.
Horse Pasture Monitoring Program: Results After Three Years, Tom Keene, S. Ray Smith
Horse Pasture Monitoring Program: Results After Three Years, Tom Keene, S. Ray Smith
Kentucky Grazing Conference
Since 2001-2002 and the outbreak of Mare Reproductive Loss Syndrome (MLRS) the University of Kentucky has been developing stronger ties with the state’s equine industry. Approximately 30% of the foal crop was lost in the Central Bluegrass region during this period with a devastating impact on the industry. Traditionally, many Thoroughbred farms have functioned as independent entities, but MLRS helped them to realize that the University of Kentucky had tremendous amount of expertise that they could provide in the areas of animal health, forage management, and other areas. Initially, there were many theories as to the cause of MLRS with …
Forage Legumes Vs. Fertilizer Nitrogen, Garry D. Lacefield
Forage Legumes Vs. Fertilizer Nitrogen, Garry D. Lacefield
Kentucky Grazing Conference
A few weeks after I started to work as a Forage Extension Specialist at the University of Kentucky, I heard my mentor and forage idol, Mr. Warren Thompson, speak on forage legumes. Warren, along with Dr’s. Tim Taylor and W.C. Templeton had pioneered the “Pasture Renovation Program” in Kentucky. In addition, Mr. Ed Smith had joined the team and collectively they developed the “Power-til Pasture Renovator.” Warren began his presentation by talking about Kentucky Forages pointing out we were so fortunate to have a good grass base and the opportunity to grow lots of legumes. He also talked about all …
Growth Of Grasses And Legumes: Impact On Grazing, S. Ray Smith
Growth Of Grasses And Legumes: Impact On Grazing, S. Ray Smith
Kentucky Grazing Conference
The primary, cool season, perennial pasture grasses used in Kentucky are orchardgrass, bluegrass, and tall fescue. When not grazed or harvested, each of these passes through successive stages of growth in the spring: 1) leafy vegetative; 2) boot with seed heads enclosed in leaf sheath; 3) heading when the seed heads begin to show and, 4) bloom when pollination has occurred ( Figure 2). Since fiber and lignin contents increase steadily beyond the vegetative stage, while percent protein and digestibility decrease, a major goal in grazing management is to maintain these grasses in the leafy, vegetative stage at all times. …
Kamper Re-Visited Concert (Program), Klaus Kamper, Janet Bass Smith
Kamper Re-Visited Concert (Program), Klaus Kamper, Janet Bass Smith
Mammoth Cave Research Symposia
One hundred years ago, a young German engineer named Max Kämper, came as a visitor to Mammoth Cave. He became so enchanted with the cavern he obtained permission to map the vast system. For the next eight months Max, along with assistance from cave guide Ed Bishop, meticulously put together a highly detailed and accurate map revealing more of the cave than ever before. He probably never realized his work would be admired by generations to follow. Some admire its artistic expression of the cave. Others see beauty in its precision. Ultimately, it has become the iconic map for generations …
Slave Guide Legacy At Mammoth Cave, Joy Medley Lyons
Slave Guide Legacy At Mammoth Cave, Joy Medley Lyons
Mammoth Cave Research Symposia
Serving as guides and explorers at Mammoth Cave partially rescued four men from the obscurity of enslavement. Stephen Bishop, Materson Bransford, Nicholas Bransford and a young man named Alfred all had their very existence documented in the written journals and diaries of various nineteenth century Mammoth Cave visitors. They were physically described, their personalities contemplated, their intelligence gauged, their dialects imitated. At least one abolitionist characterized Stephen Bishop as a charismatic natural leader who could govern the citizenry of freed men in Liberia, should he choose to relocate there.
Max Kämper’S Introduction To The New World, Stanley D. Sides, M.D.
Max Kämper’S Introduction To The New World, Stanley D. Sides, M.D.
Mammoth Cave Research Symposia
Twenty-seven year old engineer Max Eduard Kämper arrived in America at 4:00 pm on May 16, 1907 and was greeted by a thunderstorm. His presumed goals were to study American manufacturing methods, learn English, and enrich himself musically. New York had so many German immigrants at the time that German was the second most common language spoken in the city. He stayed at the Belvedere House at the corner of 4th Avenue and 18th Street, and the next day visited acquaintances in Newark. He visited New York landmarks and May 20 visited the famed Hippodrome theater. He moved on May …
Searching For Max: The Engineer, The War And The World´S Longest Cave (Part 1), Bernd Kliebhan
Searching For Max: The Engineer, The War And The World´S Longest Cave (Part 1), Bernd Kliebhan
Mammoth Cave Research Symposia
In 1908 the German engineer Max Kämper mapped 35 miles of Mammoth Cave, KY. The “Kämper Map,” forgotten in the archives for half a century, is nowadays considered as a masterpiece of underground cartography. Little was known about Max Kämper despite several attempts of American speleo-historians. Most traces were wiped out in two world wars. Nevertheless the authors could find out details of the biography of Max Kämper in German archives. The text is based based upon the radio story “Suche nach Max,” broadcasted by Hessischer Rundfunk - hr1 December 26, 1999, audio download available on http://www.kliebhan.de/kaemper.htm
Mammoth Cave International Center For Science And Learning, Rick Toomey, Shannon R. Trimboli, Bob Ward, Mike Adams, Blaine Ferrell
Mammoth Cave International Center For Science And Learning, Rick Toomey, Shannon R. Trimboli, Bob Ward, Mike Adams, Blaine Ferrell
Mammoth Cave Research Symposia
The Mammoth Cave International Center for Science and Learning (MCICSL) is a cooperative venture of Mammoth Cave National Park and Western Kentucky University. Funding, logistical support, and governance of MCICSL are shared equally by both entities. MCICSL is part of a national network of research learning centers located within the National Park Service.
The goals of MCICSL and the other research learning centers are to:
I. Facilitate the use of parks for scientific inquiry.
II. Support science-informed decision making.
III. Communicate the relevance of and provide access to knowledge gained through scientific research.
IV. Promote science literacy and resource stewardship. …
The Lamps That Lit Their Way, Rick Olson
The Lamps That Lit Their Way, Rick Olson
Mammoth Cave Research Symposia
The distinctive lanterns used at Mammoth Cave from the middle 1800s until 1938 appear to be a locally derived design. Early whale oil railroad lanterns share some characteristics of the Mammoth Cave lanterns, but L&N Railroad lanterns do not appear to have influenced the design. At this time, the design pathway appears to lead from simple open-flame tin candle lanterns to the same lantern with a petticoat lamp affixed in place of the candle, and then finally to the font or oil container being soldered onto the lamp base as one unit. This basic Mammoth Cave lantern varied somewhat over …
A Long History Of Linkages And Synergy: Western Kentucky University And The Mammoth Cave System, Deana Groves, Chris Groves, Weldon Hawkins
A Long History Of Linkages And Synergy: Western Kentucky University And The Mammoth Cave System, Deana Groves, Chris Groves, Weldon Hawkins
Mammoth Cave Research Symposia
No abstract provided.
The Puzzling Mr. Janin And Mammoth Cave Management, 1900-1910, Katie Algeo
The Puzzling Mr. Janin And Mammoth Cave Management, 1900-1910, Katie Algeo
Mammoth Cave Research Symposia
Albert Covington Janin was the key architect of tourism development at Mammoth Cave for two decades at the start of the twentieth century, yet little has been written about his tenure. This paper explores his background and accomplishments for the period 1900 to 1910 as an initial attempt to understand his contributions to Mammoth Cave. Material about his activities in relation to Mammoth Cave is synthesized from primary sources in the archival collections of the Huntington Library (HL) of San Marino, California, and the Historical Society of Washington, DC (HSW).
Contributions To Karst Science And Education From The Mammoth Cave Region, Chris Groves, William B. White
Contributions To Karst Science And Education From The Mammoth Cave Region, Chris Groves, William B. White
Mammoth Cave Research Symposia
No abstract provided.
Mammoth Cave: What A Difference A Few Friends Can Make, Lajuana S. Wilcher
Mammoth Cave: What A Difference A Few Friends Can Make, Lajuana S. Wilcher
Mammoth Cave Research Symposia
No abstract provided.
Mapping Of Mammoth Cave: How Cartography Fueled Discoveries, With Emphasis On Max Kaemper’S 1908 Map, Roger W. Brucker
Mapping Of Mammoth Cave: How Cartography Fueled Discoveries, With Emphasis On Max Kaemper’S 1908 Map, Roger W. Brucker
Mammoth Cave Research Symposia
Maps came first at Mammoth Cave, Kentucky. Then came explorers who used the maps to make discoveries as they gained a more comprehensive understanding of the longest cave in the world. The saga of mapping at Mammoth Cave parallels the mapping of North America from the 1600s onward. The first map was an “Eye-Draught Map of Mammoth Cave”, penned from memory in 1811, not a survey, to acquaint merchants with the location of saltpeter dirt. In 1835 the managers of Mammoth Cave hired a surveyor, Edmond Lee, to survey and map and profile the main cave passages. Stephen Bishop, a …
Max Kaemper’S Unique Selection Of Place Names For His 1908 Map Of Mammoth Cave, Charles A. Swedlund, George M. Crothers
Max Kaemper’S Unique Selection Of Place Names For His 1908 Map Of Mammoth Cave, Charles A. Swedlund, George M. Crothers
Mammoth Cave Research Symposia
In this paper we present Max Kaemper’s unique selection of Place Names for his 1908 map of Mammoth Cave. He realized the importance of Place Names and they became a feature on his map. His sensitive selection of Place Names provides a greater cultural emphasis, when compared to the previous maps.
The Evolution Of Cave Mapping And Cartography, Pat Kambesis
The Evolution Of Cave Mapping And Cartography, Pat Kambesis
Mammoth Cave Research Symposia
“Does it go?” Is the initial question that has inspired many a cave explorer to push the extent of a cave system. But the answer only brings more questions…how far, how long, how deep does it go? During the exploration process, as a cave system reveals its complexity, the questions also change – what is the cave’s relationship to the surface, and to surrounding caves? What are the features and obstacles that the cave contains? Those involved in cave exploration know that the only way to answer these questions is with systematic documentation in the form of cave and surface …
Mammoth Cave National Park's Max Kaemper Centennial Symposium & 9th Science Symposium: Cultural History And Research, Shannon Trimboli , Editor
Mammoth Cave National Park's Max Kaemper Centennial Symposium & 9th Science Symposium: Cultural History And Research, Shannon Trimboli , Editor
Mammoth Cave Research Symposia
No abstract provided.
Water Quality Impacts From Agricultural Land Use In Karst Drainage Basins Of Sw Kentucky And Sw China, Chris Groves, Ted Baker
Water Quality Impacts From Agricultural Land Use In Karst Drainage Basins Of Sw Kentucky And Sw China, Chris Groves, Ted Baker
Earth, Environmental, and Atmospheric Sciences Faculty Publications
Karst regions are composed of soluble rock, often limestone, which leads to the formation of fissures, sinkholes, and water flow conduits such as caves. Pollutants in karst waters tend to be quickly directed and concentrated into these subsurface conduits. As a result of this and other factors, water resources are especially sensitive to contamination and pollution in karst areas. Pollutant concentrations going into karst subsurface fluvial systems are often very similar to the concentrations surfacing at outlets such as springs. Areas connected by karst conduit flows must be distinctly determined and special attention should be given to water quality impacts …