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| Gul,B; Islam,M; Ahmad,S; Gul,S. |
| Spatial and temporal patterns of aboveground biomass and nutritive value of rangeland species with respect to the influence of grazing and soil moisture were investigated. The research was conducted during two years at the Tomagh Research Station, near Sanjawi, Ziarat District, Balochistan, Pakistan. This area is protected from grazing since 1998; however, some of the area is open for grazing. Tree sites were selected for research purposes: a protected plain, a protected hilly, and an unprotected plain grazed area. Sampling was carried out during the spring, summer and autumn seasons. Results revealed that soil moisture was greater at the protected than unprotected sites. The aboveground plant biomass was 66% to 76% lower at unprotected than protected... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Rangeland; Biomass production; Season; Semiarid; Grazing; Grass. |
| Ano: 2016 |
URL: http://www.scielo.org.ar/scielo.php?script=sci_arttext&pid=S1851-56572016000100013 |
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| Pizarro-Araya,Jaime; Cepeda-Pizarro,Jorge; Barriga,Juan E; Bodini,Andrés. |
| Current climate conditions in north-central Chile (25057'-32013'S,71043'-68°16'W)are characterized by increasing temperatures and decreasing rainfall. Global warming is expected to alter the hydrology and ecoclimatic characteristics of north-central basins with multiple effects, including changes in plant and arthropod phenology and biodiversity. Among these basins, the Elqui Valley (29°50'S, 70°52'W) stands out for its large population and the economic importance of tourism and agriculture. The taxonomic composition of agriculturally and medically important arthropods was studied in three locations in the Elqui Valley by manual capture of specimens and interviews with farmers, agricultural workers, and local leaders. Out of a total of 145 species of... |
| Tipo: Journal article |
Palavras-chave: Arthropods; Climate change; Agricultural cropland; Rangeland; Elqui Valley; Arid zones. |
| Ano: 2009 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202009000200006 |
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| Giustina Junior,Luis Henrique Paim Della; Zanella,Pablo Giliard; Baldissera,Tiago Celso; Pinto,Cassiano Eduardo; Garagorry,Fabio Cervo; Sbrissia,André Fischer. |
| Abstract: The objective of this work was to evaluate tiller dynamics and population stability of Andropogon lateralis in a natural pasture subjected to grazing height management under intermittent stocking method. The experiment was carried out in a randomized complete block design with four treatments and four replicates, in 16 experimental units of 875 m2 each. The treatments consisted of four pre-grazing heights of A. lateralis (12, 20, 28, and 36 cm), which was grazed until its initial height was reduced by 40%. Dynamics of tiller birth and death were evaluated using the marked tiller technique over a period of 18 months, from October 2015 to March 2017. The results indicate that the use of different heights for the management of natural pastures does... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Canopy height; Rangeland; Survival strategy; Tiller dynamics. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2019000104301 |
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| Lubowski, Ruben N.; Vesterby, Marlow; Bucholtz, Shawn; Baez, Alba; Roberts, Michael J.. |
| This publication presents the results of the latest (2002) inventory of U.S. major land uses, drawing on data from the Census, public land management and conservation agencies, and other sources. The data are synthesized by State to calculate the use of several broad classes and subclasses of agricultural and nonagricultural land over time. The United States has a total land area of nearly 2.3 billion acres. Major uses in 2002 were forest-use land, 651 million acres (28.8 percent); grassland pasture and range land, 587 million acres (25.9 percent); cropland, 442 million acres (19.5 percent); special uses (primarily parks and wildlife areas), 297 million acres (13.1 percent); miscellaneous other uses, 228 million acres (10.1 percent); and urban land, 60... |
| Tipo: Report |
Palavras-chave: Land use; Land-use change; Agricultural land; Nonagricultural land; Cropland; Forest-use land; Forestland; Pasture; Rangeland; Rural residential land; Special uses; Urban land; Land Economics/Use. |
| Ano: 2006 |
URL: http://purl.umn.edu/7203 |
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| Hirsch, Steven A.; Leitch, Jay A.. |
| The economic impact of three invasive, exotic weeds--diffuse, spotted, and Russian knapweed (Centaurea diffusa, C. maculosa, and Acroptilon repens)--on Montana's economy was estimated using a procedure developed for another invasive weed species. Published data and that from a survey of county weed boards were used to estimate direct negative impacts of over $14 million annually due to infestation of over 2 million acres of rangeland and wildland. This amounts to about $10.63 on each infested grazing land acre and $3.95 on each infested wildland acre. Direct plus secondary economic impacts, estimated using an input-output model, are about $42 million annually, which could support over 500 jobs in the state's economy. This first approximation suggests... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Knapweed (Centaurea diffusa; C. maculosa; And Acroptilon repens); Montana; Economic impact; Invasive weeds; Rangeland; Wildland; Resource /Energy Economics and Policy. |
| Ano: 1996 |
URL: http://purl.umn.edu/23289 |
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| Kachergis, Emily J.; Bureau of Land Management, Denver, Colorado; emily.kachergis@gmail.com; Knapp, Corrine N.; Alaska Center for Climate and Policy; corrieknapp@yahoo.com; Fernandez-Gimenez, Maria E.; Department of Forest and Rangeland Stewardship, Colorado State University; Maria.Fernandez-Gimenez@colostate.edu; Ritten, John P.; Department of Agricultural and Applied Economics, University of Wyoming; John.Ritten@uwyo.edu; Pritchett, James G.; Department of Agricultural and Resource Economics, Colorado State University; James.Pritchett@colostate.edu; Parsons, Jay; Western Center for Integrated Resource Management, Colorado State University; Jay.Parsons@colostate.edu; Hibbs, Willow; Wyoming Game and Fish Department and USDA-NRCS; Willow.Hibbs@wy.usda.gov; Roath, Roy; Department of Forest and Rangeland Stewardship, Colorado State University; Roy.Roath@colostate.edu. |
| Building models is an important way of integrating knowledge. Testing and updating models of social-ecological systems can inform management decisions and, ultimately, improve resilience. We report on the outcomes of a six-year, multidisciplinary model development process in the sagebrush steppe, USA. We focused on creating state-and-transition models (STMs), conceptual models of ecosystem change that represent nonlinear dynamics and are being adopted worldwide as tools for managing ecosystems. STM development occurred in four steps with four distinct sets of models: (1) local knowledge elicitation using semistructured interviews; (2) ecological data collection using an observational study; (3) model integration using participatory workshops; and (4)... |
| Tipo: Peer-Reviewed Reports |
Palavras-chave: Adaptive management; Ecology; Ecosystem dynamics; Knowledge integration; Participatory research; Rangeland; Sagebrush steppe. |
| Ano: 2013 |
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