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Articles 8881 - 8910 of 12076
Full-Text Articles in Physical Sciences and Mathematics
Animal Welfare--Animal Rights: Role Of Grazing, Roy Burris
Animal Welfare--Animal Rights: Role Of Grazing, Roy Burris
Kentucky Grazing Conference
The care and handling of farm animals has drawn a lot of media attention lately. Some well-publicized events have given our industry the proverbial black-eye and led to a chain of events that has left livestock producers feeling very vulnerable to negative attacks. Although these events have been very isolated, they have had some very farreaching effects. Could they have been prevented? How? What do we do now?
Extended Grazing And Reduced Stored Feed, Edward N. Ballard
Extended Grazing And Reduced Stored Feed, Edward N. Ballard
Kentucky Grazing Conference
Feed costs represent the major cost in most livestock production systems. A recently completed analysis of 225 Standardized Performance Analysis (SPA) Beef Cow Records on herds in Illinois and Iowa showed that feed cost was the overriding factor determining profitability, explaining over 57 percent of the herd-to-herd variation. Typically the cost of supplying nutrients to ruminant livestock is much greater using harvested feedstuffs as opposed to grazing pastures or crop residues. The primary function of a grassland farm is to convert solar energy to marketable livestock products in the most efficient manner. The fewer steps between the animal product and …
Stored Feed Needs: How Much? What Quality?, Jeff Lehmkuhler
Stored Feed Needs: How Much? What Quality?, Jeff Lehmkuhler
Kentucky Grazing Conference
Feed resources are the largest variable expense in beef production systems outside the initial investment in the livestock. When we look at Standardized Performance Analysis (SPA) information from Texas and Minnesota, states that are at the extreme from an environment stance, the projected costs for maintaining a beef cow are strikingly similar. It is important to note that these costs include all expenses and opportunity costs. Getting back to the SPA information, in 2007 the annual cost to maintain a cow in Texas was determined to be roughly $590 while the Minnesota value was near $610 or only about $20/cow …
Tall Fescue Grazing Research, Glen Aiken
Tall Fescue Grazing Research, Glen Aiken
Kentucky Grazing Conference
‘Kentucky-31’ tall fescue, like it or hate it, covers 5 million acres of Kentucky and if you do not have it on your farm, it is likely that one of your bordering neighbors does! Tall fescue owes its persistence and productivity in large part to a fungal endophyte that infects most plants. This endophyte produces an array of alkaloids that benefit the plant in tolerating heat, drought, and grazing. Unfortunately, the endophyte also produces ergot alkaloids that can cause “fescue toxicosis” in cattle. Cattle inflicted with toxicosis have reduced dry matter intake, elevated body temperature, and often retain their winter …
Weed Control Options For Pastures, Jon Doran
Weed Control Options For Pastures, Jon Doran
Kentucky Grazing Conference
What is a weed? A pasture or hayfield “weed” is any plant that you deem as being out of place and/or a plant that is decreasing your desired forage production. Weeds may be classified in several ways including broadleaf weeds, woody plants, and undesirable grasses. Besides decreasing forage, weeds can also interfere with forage utilization, grazing distribution, etc. There are several methods available to control weeds and increase production of and access to desirable forages. The three main methods are cultural, mechanical, and chemical. The cultural method is quite simple-a thriving grass stand is an excellent form of weed control …
Our Experiences With Eastern Gamagrass, Tommy R. Yankey
Our Experiences With Eastern Gamagrass, Tommy R. Yankey
Kentucky Grazing Conference
As livestock producers try to reduce their cost of production, many look at ways to reduce their feed costs. Feed costs have been identified as the largest single cost of livestock production, making up 50 to 70% of the total cost of production. Grazing is the cheapest way to feed cattle on a cost per pound of nutrient basis.
New Developments In Grazing Species And Varieties, S. Ray Smith
New Developments In Grazing Species And Varieties, S. Ray Smith
Kentucky Grazing Conference
During the last 10 years there have been several new forage species that have emerged as useful in grazing systems and many new varieties have been released of traditional species. Plant breeders continue to make improvement in our traditional pasture species like tall fescue, orchardgrass, and red and white clover. In the following paragraphs, I will focus more on some of the forage species that you may not be as familiar with and highlight the advancements occurring in developing new varieties for grazing. There are many sources of information on this subject. I especially encourage you to read the new …
Why Should I Improve My Grazing Program?, Garry D. Lacefield
Why Should I Improve My Grazing Program?, Garry D. Lacefield
Kentucky Grazing Conference
Grazing represents the cheapest way to feed ruminants on a cost per pound of nutrient basis. Stored feed is usually the single largest item in livestock budgets and cost or amount of stored feed is usually the best prediction of potential profitability in most beef cattle operations.
Foreword And Kfgc Award Winners [2009], Garry D. Lacefield, Christi L. Forsythe
Foreword And Kfgc Award Winners [2009], Garry D. Lacefield, Christi L. Forsythe
Kentucky Grazing Conference
No abstract provided.
Agenda: Best Practices For Community And Environmental Protection, University Of Colorado Boulder. Natural Resources Law Center. Intermountain Oil And Gas Bmp Project, Colorado. Oil And Gas Conservation Commission
Agenda: Best Practices For Community And Environmental Protection, University Of Colorado Boulder. Natural Resources Law Center. Intermountain Oil And Gas Bmp Project, Colorado. Oil And Gas Conservation Commission
Best Practices for Community and Environmental Protection (October 14)
The first Intermountain BMP Project workshop, sponsored by the Natural Resources Law Center and the Colorado Oil and Gas Conservation Commission, was held in Rifle, Colorado on October 14, 2009 at the Garfield County Fairground for over 170 participants.
Speakers from Federal, state and local governments, the community, industry and environmental consultants, and conservation groups focused presentations and discussion on a greater understanding of what Best Management Practices (BMPs) are appropriate to the western slope of Colorado and how they are integrated into developments.
Slides: Best Management Practices: Planning, Leasing, Permitting, Jamie Connell
Slides: Best Management Practices: Planning, Leasing, Permitting, Jamie Connell
Best Practices for Community and Environmental Protection (October 14)
Presenter: Jamie Connell, Northwest Colorado District Manager, U.S. Bureau of Land Management (BLM) Colorado
23 slides
Slides: Disappearing Roads--An Efd Project: An Exploration Into Low Impact And Efficient Gas Field Drilling, Charles Dolan
Slides: Disappearing Roads--An Efd Project: An Exploration Into Low Impact And Efficient Gas Field Drilling, Charles Dolan
Best Practices for Community and Environmental Protection (October 14)
Presenter: Rich Haut, Houston Advanced Research Center (HARC), for Dr. Charles Dolan, University of Wyoming, Environmentally Friendly Drilling Program
25 slides
Slides: Energy By Design: Possible Bmp For Mitigation Planning, Dave Gann
Slides: Energy By Design: Possible Bmp For Mitigation Planning, Dave Gann
Best Practices for Community and Environmental Protection (October 14)
Presenter: Dave Gann, The Nature Conservancy
15 slides
Slides: Recommended Best Management Practices For Plants Of Concern: Practices Developed To Reduce The Impacts Of Oil And Gas Development Activities To Plants Of Concern, Brian Kurzel, Colorado Rare Plant Conservation Initiative
Slides: Recommended Best Management Practices For Plants Of Concern: Practices Developed To Reduce The Impacts Of Oil And Gas Development Activities To Plants Of Concern, Brian Kurzel, Colorado Rare Plant Conservation Initiative
Best Practices for Community and Environmental Protection (October 14)
Presenter: Brian Kurzel, Colorado Natural Areas Program (CNAP)
27 slides
Slides: Environmentally Friendly Drilling Systems Program (Efd), Rich Haut
Slides: Environmentally Friendly Drilling Systems Program (Efd), Rich Haut
Best Practices for Community and Environmental Protection (October 14)
Presenter: Rich Haut, Houston Advanced Research Center
23 slides
Slides: Innovative Best Practices For The Western Slope: Stormwater Management Solutions And Philosophy For The Oil And Gas Industry, Kyle N. Schildt
Slides: Innovative Best Practices For The Western Slope: Stormwater Management Solutions And Philosophy For The Oil And Gas Industry, Kyle N. Schildt
Best Practices for Community and Environmental Protection (October 14)
Presenter: Kyle N. Schildt, P.E., LT Environmental, Inc.
12 slides
Slides: Rifle, Silt, New Castle Community Development Plan: A Collaborative Planning Approach To Natural Gas Development, Peggy Utesch
Slides: Rifle, Silt, New Castle Community Development Plan: A Collaborative Planning Approach To Natural Gas Development, Peggy Utesch
Best Practices for Community and Environmental Protection (October 14)
Presenter: Peggy Utesch, Movin' Forward Consulting
25 slides
Slides: The Use Of Terrestrial Cyanobacteria For The Rehabilitation Of Arid Soils: Not Just Another Good Idea, Timothy Flynn
Slides: The Use Of Terrestrial Cyanobacteria For The Rehabilitation Of Arid Soils: Not Just Another Good Idea, Timothy Flynn
Best Practices for Community and Environmental Protection (October 14)
Presenter: Dr. Timothy Flynn, Primordial Solutions Inc.
42 slides
Slides: Intermountain Oil And Gas Bmp Project, Kathryn Mutz
Slides: Intermountain Oil And Gas Bmp Project, Kathryn Mutz
Best Practices for Community and Environmental Protection (October 14)
Presenter: Kathryn Mutz, Natural Resources Law Center
19 slides
Slides: Introduction To Constructive Engagement In The Oil And Gas Industry, Susan T. Wildau, Christopher W. Moore
Slides: Introduction To Constructive Engagement In The Oil And Gas Industry, Susan T. Wildau, Christopher W. Moore
Best Practices for Community and Environmental Protection (October 14)
Presenters: Susan T. Wildau and Christopher W. Moore, CDR Associates (Collaborative Decision Resources), Boulder, CO
22 slides
Slides: Bmp Project, Kent Kuster
Slides: Bmp Project, Kent Kuster
Best Practices for Community and Environmental Protection (October 14)
Presenter: Kent Kuster, Consultation Coordinator, Colorado Department of Public Health and Environment (CDPHE)
17 slides
Slides: Comprehensive Drilling Plans, Dave Neslin
Slides: Comprehensive Drilling Plans, Dave Neslin
Best Practices for Community and Environmental Protection (October 14)
Presenter: Dave Neslin, Director, Colorado OIl and Gas Conservation Commission (COGCC)
8 slides
Geogram 2009, David J. Keeling Editor, Wku Department Of Geography And Geology
Geogram 2009, David J. Keeling Editor, Wku Department Of Geography And Geology
Earth, Environmental, and Atmospheric Sciences Publications
No abstract provided.
Heat And Smoke Effects On Red Brome Soil Seed Banks, Scott R. Abella, E. Cayenne Engel
Heat And Smoke Effects On Red Brome Soil Seed Banks, Scott R. Abella, E. Cayenne Engel
Public Policy and Leadership Faculty Publications
Management of exotic plants that are annuals entails understanding and managing their soil seed banks. We completed a study of the influences of heat and liquid smoke on red brome (Bromus rubens) soil seed banks collected from Red Rock Canyon in southern Nevada as part of a collaborative fire effects monitoring effort with Bureau of Land Management - Las Vegas. We collected the samples from the 2005 Loop Fire, where we observed in a monitoring field study that exotic grasses such as red brome were relatively sparse in the first 2-3 years (which were during a dry period) following the …
Nebraska Grout Task Force In-Situ Study Of Grout Material 2001 - 2006 And 2007 Dye Tests, Susan Olafsen Lackey, Will F. Myers, Thomas C. Christopherson, Jeffrey J. Gottula
Nebraska Grout Task Force In-Situ Study Of Grout Material 2001 - 2006 And 2007 Dye Tests, Susan Olafsen Lackey, Will F. Myers, Thomas C. Christopherson, Jeffrey J. Gottula
Conservation and Survey Division
No abstract provided.
Tb202: Composition And Biomass Of Forest Floor Vegetation In Experimentally Acidified Paired Watersheds At The Bear Brook Watershed In Maine, Peter Kenlan, G. B. Wiersma, A. S. White, I. J. Fernandez
Tb202: Composition And Biomass Of Forest Floor Vegetation In Experimentally Acidified Paired Watersheds At The Bear Brook Watershed In Maine, Peter Kenlan, G. B. Wiersma, A. S. White, I. J. Fernandez
Technical Bulletins
The percentage cover (abundance), frequency of occurrence, biomass, species richness, and species diversity of understory herbs was measured on a paired watershed ecosystem in eastern Maine, USA. This paired watershed site (Bear Brook Watershed in Maine, BBWM) has had the West Bear Brook Watershed treated bi-monthly with granular ammonium sulfate at a rate of 28.8 kg S ha-1 yr-1 and 25.2 kg N ha-1 yr-1 since 1989. East Bear Brook Watershed serves as the reference site. More than 100 plots were randomly located across the two watersheds. The data suggest that there is generally a lower frequency of occurrence of …
Understanding Paleoclimate And Human Evolution Through The Hominin Sites And Paleolakes Drilling Project, Andrew Cohen, Ramon Arrowsmith, Anna K. Behrensmeyer, Christopher Campisano, Craig Feibel, Shimeles Fisseha, Roy Johnson, Zelalem Bedaso, Charles Lockwood, Emma Mbua, Daniel Olago, Richard Potts, Kaye Reed, Robin Renaut, Jean-Jacques Tiercelin, Mohammed Umer
Understanding Paleoclimate And Human Evolution Through The Hominin Sites And Paleolakes Drilling Project, Andrew Cohen, Ramon Arrowsmith, Anna K. Behrensmeyer, Christopher Campisano, Craig Feibel, Shimeles Fisseha, Roy Johnson, Zelalem Bedaso, Charles Lockwood, Emma Mbua, Daniel Olago, Richard Potts, Kaye Reed, Robin Renaut, Jean-Jacques Tiercelin, Mohammed Umer
Geology Faculty Publications
Understanding the evolution of humans and our close relatives is one of the enduring scientific issues of modern times. Since the time of Charles Darwin, scientists have speculated on how and when we evolved and what conditions drove this evolutionary story. The detective work required to address these questions is necessarily interdisciplinary, involving research in anthropology, archaeology, human genetics and genomics, and the earth sciences. In addition to the difficult tasks of finding, describing, and interpreting hominin fossils (the taxonomic tribe which includes Homo sapiens and our close fossil relatives from the last 6 Ma), much of modern geological research …
Factors Influencing Perennial Pasture Adoption In The Medium Rainfall Zone Of The South West Natural Resource Management Region Of Western Australia, Ned Crossley, Stephen Tunbridge, Kathi Mcdonald
Factors Influencing Perennial Pasture Adoption In The Medium Rainfall Zone Of The South West Natural Resource Management Region Of Western Australia, Ned Crossley, Stephen Tunbridge, Kathi Mcdonald
Resource management technical reports
No abstract provided.
Quality Control Of Soil Water Data In Applied Climate, Jinshing You, Kenneth Hubbard, Rezaul Mamood, Venkataramana Sridhar, Dennis Todey
Quality Control Of Soil Water Data In Applied Climate, Jinshing You, Kenneth Hubbard, Rezaul Mamood, Venkataramana Sridhar, Dennis Todey
School of Natural Resources: Faculty Publications
Abstract: Soil moisture is a key state variable from both climate and hydrologic cycle assessment perspectives. Recently, automated measurements of soil moisture with sensors deployed at sites in a real-time monitoring network have provided valuable new data to monitor the soil water resource. However, to assure the quality of the data, quality control QC tools are needed. Earlier studies left little literature on the QC of soil water data as measurements were generally not part of a network that routinely collected measurements. This paper presents a systematic QC analysis and methodology to evaluate the performance of candidate QC techniques using …
Martian Life Detection With Amino Acid Enantiomers, Ali Jamil, Gaosen Zhang, Henry J. Sun
Martian Life Detection With Amino Acid Enantiomers, Ali Jamil, Gaosen Zhang, Henry J. Sun
Undergraduate Research Opportunities Program (UROP)
The Viking mission showed that Martian soil can degrade a heterotrophic medium to carbon dioxide as if live microorganisms were present. The result is considered inconclusive, however, because abiotic oxidants, such as superoxides, may also exist on Mars and would explain the Viking result. One way to resolve this ambiguity is to repeat the Viking experiment with a isomerically pure medium. The consumption of one isomer, either D or L, would indicate biological activity. Indiscriminate destruction of both isomers would indicate abiotic redox processes. This idea was validated for glucose by REU research last summer (Sun et al. 2009). The …