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Articles 1 - 30 of 73
Full-Text Articles in Physical Sciences and Mathematics
Lake Mead National Recreation Area Vegetation Monitoring And Management: Quarterly Progress Report, Period Ending December 31, 2006, Margaret N. Rees
Lake Mead National Recreation Area Vegetation Monitoring And Management: Quarterly Progress Report, Period Ending December 31, 2006, Margaret N. Rees
Vegetation Monitoring
Executive Summary
- Two new Weed Sentry research assistants were hired.
- Weed Sentry staff surveyed for exotic species on 89 miles of roads on NPS and BLM land and treated more than 21,000 exotic plants in incipient populations.
- A grid-based rare plant monitoring method was tested this quarter.
- A manuscript detailing vegetation succession on a water pipeline at Lake Mead NRA was submitted for review to the journal Crossosoma.
- New integrative projects undertaken this quarter included establishing a competition study between a native grass and the exotic Sahara mustard, salvaging plants for research purposes from private sites with permission from landowners, …
Kfgc Forage Spokesman Contest, Todd A. Clark, Farms, Inc., Robey Farms
Kfgc Forage Spokesman Contest, Todd A. Clark, Farms, Inc., Robey Farms
Kentucky Grazing Conference
No abstract provided.
New Options For Extending Grazing, Edward N. Ballard
New Options For Extending Grazing, 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.
Dollars & Cents Of Intensive Grazing, Kenneth H. Burdine
Dollars & Cents Of Intensive Grazing, Kenneth H. Burdine
Kentucky Grazing Conference
A rotational grazing system can generally be defined as the use of several pastures with one being grazed while the others are rested. On the contrary, conventional or continuous grazing systems allow livestock access to the entire pasture area and let them decide where, what, and how long to graze. In most cases, Kentucky pastures employing continuous grazing systems are too large for efficient management and forage utilization. In such instances, cattle overgraze more palatable forages and areas close to shade and water, while other sections of the pasture are underutilized. This leads to lower animal output per acre than …
Uk Horse Pasture Evaluation Program, Tom Keene, S. Ray Smith
Uk Horse Pasture Evaluation Program, Tom Keene, S. Ray Smith
Kentucky Grazing Conference
The University of Kentucky is developing stronger ties with the state’s horse industry in the areas of research, extension and teaching. Many horse farms in the bluegrass region are interested in UK’s assistance with pasture evaluation. During the fall of 2005 a team from the UK Forage Extension Program (Ray Smith, Tom Keene, Jesse Morrison, Gabriel Roberts) conducted a pilot project to evaluate horse pastures on 14 central KY farms. One of the focuses of the pilot was the evaluation of pastures for percent tall fescue and the potential of fescue stands to cause fescue toxicity in pregnant broodmares. We …
Managing Pasture Growth And Quality With Grazing, S. Ray Smith
Managing Pasture Growth And Quality With Grazing, S. Ray Smith
Kentucky Grazing Conference
One of the keys to profitable livestock production is to minimize the costs of producing a marketable animal or animal product. Feed costs are commonly 70-80 percent of the cost of growing or maintaining an animal. Pastures provide feed at a cost of .01-.02 cents/lb of TDN while hay costs .04-.06 cents/lb TDN. Improved pasture management offers the single greatest opportunity to lower production costs, assuming that animal genetics, health, marketing procedures, and other areas of management have been addressed. A primary goal of livestock producers should be to utilize grazed forage for as many months of the year as …
Everyday Cattle Graze Is Money Saved, Garry D. Lacefield
Everyday Cattle Graze Is Money Saved, Garry D. Lacefield
Kentucky Grazing Conference
During one of my first visits to New Zealand over twenty years ago, I had the opportunity to visit many different dairy, beef, sheep and deer farms. While visiting a dairy farm, I remember the farmer telling me about his grazing program and their goal to “optimize grazing and minimize stored feed.” I remember him saying, “everyday grazed is money saved”. I admit, the reality of that statement didn’t truly sink in that day; but over the years, the truth of what he said has not only “sunk in” but has been reinforced by visits to other farms literally around …
Bermudagrass In Kentucky, David C. Ditsch
Bermudagrass In Kentucky, David C. Ditsch
Kentucky Grazing Conference
Interest in bermudagrass [Cynodon dactylon (L.) Pers] is increasing in Kentucky as livestock producers continue their search for warm-season perennial forages capable of filling in the mid-summer growth slump we commonly experience with our traditional cool-season grasses. This is partially due to the recent availability of seeded bermudagrass varieties with improved winter hardiness thereby reducing establishment cost and increasing the odds of success.
Grazing Corn, Chad Lee
Grazing Corn, Chad Lee
Kentucky Grazing Conference
Grazing is the cheapest form of feed for cattle. While perennial grasses and alfalfa are reliable components to a grazing system, another component could be corn.
Grazing corn is an option for a couple of situations: 1) as a bridge crop when pasture renovation is needed, and 2) as an insurance crop in an overall grazing system.
Forages On The Web, Scott Flynn
Foreword And Kfgc Award Winners [2006], Garry D. Lacefield, Christi L. Forsythe
Foreword And Kfgc Award Winners [2006], Garry D. Lacefield, Christi L. Forsythe
Kentucky Grazing Conference
No abstract provided.
Alstroemeria, Aileen Reid
Alstroemeria, Aileen Reid
Bulletins 4000 -
About 60 species of Alstroemeria grow wild in South America, in habitats ranging from the snowline of the Andes and high mountain plateaus down through the highland forests to the coastal deserts.
A member of the lily family, Alstroemeria grows from a rhizome that also develops tuberous storage outgrowths and fleshy roots. The aerial shoots can be either vegetative or reproductive. Normally shoots that have unfolded more than 30 leaves will not flower and remain vegetative.
The leaves of Alstroemeria are unusual in that they rotate through 180 degrees as they unfold, so that the upper surface becomes the lower …
Water Supplies For Horticulture In The Lower Great Southern, D J. Mcfarlane Dr, Ruhi Ferdowsian, Arjen Ryder
Water Supplies For Horticulture In The Lower Great Southern, D J. Mcfarlane Dr, Ruhi Ferdowsian, Arjen Ryder
Bulletins 4000 -
No abstract provided.
Lake Mead National Recreation Area Vegetation Monitoring And Management: Final Close-Out Report, Time Period: October 1, 2005 To September 30, 2006, Margaret N. Rees
Lake Mead National Recreation Area Vegetation Monitoring And Management: Final Close-Out Report, Time Period: October 1, 2005 To September 30, 2006, Margaret N. Rees
Vegetation Monitoring
The National Park Service (NPS) at Lake Mead National Recreation Area (LAME) entered into a cooperative agreement with the University of Nevada, Las Vegas (UNLV) to accomplish vegetation monitoring and management activities. This report summarizes activities that took place by UNLV under this task agreement between October 1, 2005, and September 30, 2006. The activities included:
- Weed Sentry mapping and treating incipient populations of exotic invasive plants throughout Clark County, including along shorelines of Lakes Mead and Mohave;
- Monitoring of targeted rare native plant species;
- Sahara mustard research; and
- Providing technical assistance upon request to the NPS vegetation manager.
In …
Ecophysiology Of Two Native Invasive Woody Species And Two Dominant Warm-Season Grasses In The Semiarid Grasslands Of The Nebraska Sandhills, Kathleen D. Eggemeyer, Tala Awada, David A. Wedin, F. Edwin Harvey, Xinhua Zhou
Ecophysiology Of Two Native Invasive Woody Species And Two Dominant Warm-Season Grasses In The Semiarid Grasslands Of The Nebraska Sandhills, Kathleen D. Eggemeyer, Tala Awada, David A. Wedin, F. Edwin Harvey, Xinhua Zhou
School of Natural Resources: Faculty Publications
Populations of Pinus ponderosa and Juniperus virginiana are expanding into semiarid Sandhills grasslands in Nebraska. To evaluate the physiological basis of their success, we measured the seasonal course of leaf gas exchange, plant water status, and carbon isotope discrimination in these two native trees and two native C4 grasses (Schizachyrium scoparium and Panicum virgatum). Compared to the trees, grasses had higher net photosynthetic rates (Anet) and water use efficiency (WUE) and more negative predawn and midday water potentials (Ψ) in June and July. While leaf Ψ and rates of leaf gas exchange declined for all …
Current Status And 25 Year Trends For Soil Acidity, Fertility And Salinity In The Coastal Catchments Of The Peel-Harvey, Robert Summers, David Weaver
Current Status And 25 Year Trends For Soil Acidity, Fertility And Salinity In The Coastal Catchments Of The Peel-Harvey, Robert Summers, David Weaver
All other publications
The current status and trends of soil analyses in the coastal catchment of the Peel Harvey estuary were developed from historical soil data (1982 to 1991) combined with a renewed sampling to greater depth (1 m). This report encompasses the data collected from the first year of the project. Soil phosphorus content was found to be high but has dropped slightly since 1991. Soil pH is very low and is likely to be limiting production but have risen slightly since 1991. Soil potassium content is generally so low that it may be limiting production especially to the west of the …
Blanding’S Turtle (Emydoidea Blandingii): A Technical Conservation Assessment, Justin D. Congdon, Douglas A. Keinath
Blanding’S Turtle (Emydoidea Blandingii): A Technical Conservation Assessment, Justin D. Congdon, Douglas A. Keinath
USDA Forest Service / UNL Faculty Publications
Blanding’s turtles (Emydoidea blandingii) are secure in Nebraska, and they range from being vulnerable to threatened, or endangered throughout most of the rest of their distribution. In Region 2, they have not been reported from Kansas, they are extremely rare in South Dakota, and they occupy wetlands in the northern half of Nebraska. The largest population known within the range of Blanding’s turtles is at Valentine National Wildlife Refuge, Nebraska.
The core habitat of Blanding’s turtles has an aquatic component that consists of a permanent wetland and a suite of other, usually smaller and more temporary, wetlands such …
Sheep Updates 2006 - Part 4, K. G. Geenty, A. A. Swan, A. J. Smith, J. L. Smith, Chris Oldham, R. G. Woodgate, R. A. Love, E. Dobbe, H. M. Hoult, J. Pearson, S. Hill, A. Van Burgel, R. B. Besier, R. Warburton, L. Mathwin, D. Rogers, E. Crossley, Allan Herbert, P. Nichols, Tony Albertsen, Darryl Mcclements, Graeme Martin, Penny Hawken, Caroline Vinoles, Beth Paganoni, Dominique Blanche
Sheep Updates 2006 - Part 4, K. G. Geenty, A. A. Swan, A. J. Smith, J. L. Smith, Chris Oldham, R. G. Woodgate, R. A. Love, E. Dobbe, H. M. Hoult, J. Pearson, S. Hill, A. Van Burgel, R. B. Besier, R. Warburton, L. Mathwin, D. Rogers, E. Crossley, Allan Herbert, P. Nichols, Tony Albertsen, Darryl Mcclements, Graeme Martin, Penny Hawken, Caroline Vinoles, Beth Paganoni, Dominique Blanche
Sheep Updates
This session covers seven papers from different authors:
MANAGEMENT
1. Wool and meat traits in Merino flocks in different regions, K.G. Geenty, A.A. Swan, A.J. Smith, J.L. Smith, Sheep CRC and CSIRO Livestock Industries, Armidale
2. Fat score or Condition score? - It all depends on what you want to do! Chris Oldham, Department of Agriculture and Food Western Australia
3. Sheep worm control - the latest for Western Australia, RG Woodgate, RA Love, E Dobbe, HM Hoult, J Pearson, S Hill, A van Burgel and RB Besier, Department of Agriculture and Food Western Australia
PASTURES
4. Rethinking pasture production …
The Land Is In Your Hands : A Practical Guide For Owners Of Small Rural Landholdings In Western Australia, Department Of Agriculture And Food, Wa
The Land Is In Your Hands : A Practical Guide For Owners Of Small Rural Landholdings In Western Australia, Department Of Agriculture And Food, Wa
Bulletins 4000 -
This Bulletin discusses various aspects of managing a small farm or property in Western Australia, including soil and land care, vegetation and plant control on farm holdings, water resource management, biosecurity, plant, animal and insect pest control and livestock management.
Comparing Climate-Change Mitigating Potentials Of Alternative Synthetic Liquid Fuel Technologies Using Biomass And Coal, Robert H. Williams, Eric D. Larson, Haiming Jin
Comparing Climate-Change Mitigating Potentials Of Alternative Synthetic Liquid Fuel Technologies Using Biomass And Coal, Robert H. Williams, Eric D. Larson, Haiming Jin
Climate Change and the Future of the American West: Exploring the Legal and Policy Dimensions (Summer Conference, June 7-9)
Presenter: Robert H. Williams, Senior Research Scientist, Princeton University, Princeton, NJ.
19 pages (includes color illustrations).
Contains references.
Slides: Getting Onto A Path For Stabilizing Atmospheric Co2 At 450 Ppmv With “Near-At-Hand” Energy Technologies, Robert H. Williams
Slides: Getting Onto A Path For Stabilizing Atmospheric Co2 At 450 Ppmv With “Near-At-Hand” Energy Technologies, Robert H. Williams
Climate Change and the Future of the American West: Exploring the Legal and Policy Dimensions (Summer Conference, June 7-9)
Presenter: Robert H. Williams, Senior Research Scientist, Princeton University, Princeton, NJ.
35 slides.
Slides: In The Nick Of Time: Pathways To A Post-2012 Climate Treaty Framework, Annie Petsonk
Slides: In The Nick Of Time: Pathways To A Post-2012 Climate Treaty Framework, Annie Petsonk
Climate Change and the Future of the American West: Exploring the Legal and Policy Dimensions (Summer Conference, June 7-9)
Presenter: Annie Petsonk, Environmental Defense, Washington, DC.
22 slides.
Slides: The Cdm Carbon Market And The Upcoming U.S. Market, Evan A. Evans
Slides: The Cdm Carbon Market And The Upcoming U.S. Market, Evan A. Evans
Climate Change and the Future of the American West: Exploring the Legal and Policy Dimensions (Summer Conference, June 7-9)
Presenter: Evan A. Evans, P.E., Vice President and Director of Engineering, Econergy International, Boulder, CO.
15 slides.
The Earth, Energy, And Agriculture, Tad W. Patzek
The Earth, Energy, And Agriculture, Tad W. Patzek
Climate Change and the Future of the American West: Exploring the Legal and Policy Dimensions (Summer Conference, June 7-9)
Presenter: Tad W. Patzek, Professor of Petroleum Engineering, University of California at Berkeley, Berkeley, CA.
13 pages (includes some color illustrations).
Contains references.
Slides: Agriculture: Climate Change Problem, Solution, Or Both? And U.S. Agriculture And Climate Change: Challenge And Opportunity, David L. Carlson
Slides: Agriculture: Climate Change Problem, Solution, Or Both? And U.S. Agriculture And Climate Change: Challenge And Opportunity, David L. Carlson
Climate Change and the Future of the American West: Exploring the Legal and Policy Dimensions (Summer Conference, June 7-9)
Presenter: David L. Carlson, President, Resource Analysis, Inc., Denver, CO.
1 page and 19 slides.
Contains footnotes.
Slides: The Real Biofuel Cycles And The Earth, Biofuels, And Reality, Tad W. Patzek
Slides: The Real Biofuel Cycles And The Earth, Biofuels, And Reality, Tad W. Patzek
Climate Change and the Future of the American West: Exploring the Legal and Policy Dimensions (Summer Conference, June 7-9)
Presenter: Tad W. Patzek, Professor of Petroleum Engineering, University of California at Berkeley, Berkeley, CA
2 pages and 29 slides.
Contains footnotes.
Agenda: Climate Change And The Future Of The American West: Exploring The Legal And Policy Dimensions, University Of Colorado Boulder. Natural Resources Law Center
Agenda: Climate Change And The Future Of The American West: Exploring The Legal And Policy Dimensions, University Of Colorado Boulder. Natural Resources Law Center
Climate Change and the Future of the American West: Exploring the Legal and Policy Dimensions (Summer Conference, June 7-9)
Sponsors: The William and Flora Hewlett Foundation; BP America; Holland & Hart; Patrick, Miller & Krope, P.C.; The Rocky Mountain Mineral Law Foundation, Rocky Mountain Natural Resource Center of the National Wildlife Federation, Western Water Assessment.
Exploring the legal and political dimensions that climate change will bring to the American West will be the focus of the CU-Boulder Natural Resources Law Center's 27th Annual Summer Conference.
Titled "Climate Change and the Future of the American West: Exploring the Legal and Policy Dimensions," the conference will be held June 7-9 at the Fleming Law Building on the University of Colorado at …
Slides: Climate Change & The Ecological Resources Of The West, Chris Field
Slides: Climate Change & The Ecological Resources Of The West, Chris Field
Climate Change and the Future of the American West: Exploring the Legal and Policy Dimensions (Summer Conference, June 7-9)
Presenter: Chris Field, Director, Department of Global Ecology, Carnegie Institution of Washington, DC.
39 slides.
Contains references.
The Fate And Transport Of Nitrogen (N) And The Effect Of Emergent Plants On Natural Treatment Of N-Species At Las Vegas Wash, Nevada, Tanju Kiriscioglu
The Fate And Transport Of Nitrogen (N) And The Effect Of Emergent Plants On Natural Treatment Of N-Species At Las Vegas Wash, Nevada, Tanju Kiriscioglu
UNLV Theses, Dissertations, Professional Papers, and Capstones
The purpose of this study is to analyze the effect of emergent plant communities at Las Vegas Wash (the System) using a system dynamics modeling approach. Understanding the dynamics of nitrogen (N —major polluting nutrient in the Wash) that enters the System is important because it occasionally causes algal blooms, choking Lake Mead through excessive eutrophication. Emergent plant communities are an integral part of wetland ecosystems and they play a crucial role in natural treatment of nutrients. This study is intended to test this hypothesis.
The study makes use of Wash data from reliable sources (Las Vegas Valley Water District, …
Invasive Species Definition Clarification And Guidance, Invasive Species Advisory Committee
Invasive Species Definition Clarification And Guidance, Invasive Species Advisory Committee
National Invasive Species Council
Summary
Invasive species are those that are not native to the ecosystem under consideration and that cause or are likely to cause economic or environmental harm or harm to human, animal, or plant health. Plant and animal species under domestication or cultivation and under human control are not invasive species. Furthermore for policy purposes, to be considered invasive, the negative impacts caused by a non-native species will be deemed to outweigh the beneficial effects it provides. Finally, a non-native species might be considered invasive in one region but not in another. Whether or not a species is considered an invasive …