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Willow cover as a stream-recovery indicator under a conservation grazing plan

Journal Articles & Books
Décembre, 2012

Many rangeland streams and associated fisheries have suffered from livestock grazing as a cost of upland-forage utilization. Due to damage from intensive usage, restoration of damaged streams is now a common land-management objective. The Squaw Valley Ranch of Elko County, Nevada, US, in cooperation with the US Bureau of Land Management (BLM) and Barrick Gold Corp., is attempting to improve those portions of the Rock Creek watershed negatively affected by past ranch operations.

Soil erosion induced by land use changes as determined by plough marks and field evidence in the Aksum area (Ethiopia)

Journal Articles & Books
Décembre, 2012
Éthiopie

The aim of the research presented here was to analyse soil erosion in response to changes in agricultural and soil conservation practices throughout history. The Aksum area (Tigray, northern Ethiopia) presents favourable conditions for the development of a long-term approach for assessing soil conservation techniques that have been applied for centuries (i.e., since the Aksumite kingdom, 400 BC to 800 AD). These techniques have been maintained until the present day, and parts of the terraced systems of the area are still in use.

Interactions between elevated atmospheric CO2 and defoliation on North American rangeland plant species at low and high N availability

Journal Articles & Books
Décembre, 2012
États-Unis d'Amérique

Although common disturbances of grazing lands like plant defoliation are expected to affect their sensitivity to increasing atmospheric CO2 concentration, almost no research has been conducted to evaluate how important such effects might be on the direct responses of rangelands to CO2. This growth chamber experiment subjected intact plant–soil cylinders from a Wyoming, USA, prairie to a 3‐way factorial of CO2 (370 vs. 720 μL L−1), defoliation (non‐clipped vs. clipped) and soil nitrogen (control vs. 10 g m−2 added N) under simulated natural climatic conditions.

Participatory GIS Approach for Assessing Land Suitability for Rainwater Harvesting in an Arid Rangeland Environment

Journal Articles & Books
Décembre, 2012
Jordanie
Afrique septentrionale

The dry rangelands of West Asia and North Africa are fragile and severely degraded due to low rainfall and mismanagement of natural resources. Rainwater harvesting (RWH) interventions are used to increase soil moisture content, vegetation cover, and productivity. However, adoption of rainwater harvesting by communities is slow. To understand adoption constraints and to develop options for sustainable integration of rainwater harvesting, a benchmark watershed was established in the dry rangelands of Jordan.

Temporal progress in improving carbon and nitrogen storage by grazing exclosure practice in a degraded land area of China's Horqin Sandy Grassland

Journal Articles & Books
Décembre, 2012
Chine

Overgrazing is a primary agent to cause and aggravate desertification in the Horqin Sandy Grassland of northern China that has reduced the capacity of carbon (C) and nitrogen (N) storage in the region. Grazing exclosure practice is recommended to control the desertification by vegetation restoration. How the restoration improves the C and N storage needs to be answered to the policy makers for their future land use planning and decisions.

Modeling regional variation in net primary production of pinyon–juniper ecosystems

Journal Articles & Books
Décembre, 2012

Spatial dynamics of carbon fluxes in dryland montane ecosystems are complicated and may be influenced by topographic conditions and land tenure. Here we employ a modified version of the Carnegie Ames Stanford Approach (CASA) ecosystem model to estimate annual net primary production (NPP) at a fine spatial resolution (30m) in pinyon–juniper (P–J) woodlands of the Colorado Plateau. NPP estimated by CASA was generally comparable to validation data from a statistical NPP model and field observations.

Revolutionary Land Use Change in the 21st Century: Is (Rangeland) Science Relevant?

Journal Articles & Books
Décembre, 2012

Rapidly increasing demand for food, fiber, and fuel together with new technologies and the mobility of global capital are driving revolutionary changes in land use throughout the world. Efforts to increase land productivity include conversion of millions of hectares of rangelands to crop production, including many marginal lands with low resistance and resilience to degradation. Sustaining the productivity of these lands requires careful land use planning and innovative management systems.

How Can Science Be General, Yet Specific? The Conundrum of Rangeland Science in the 21st Century

Journal Articles & Books
Décembre, 2012

A critical challenge for range scientists is to provide input to management decisions for land units where little or no data exist. The disciplines of range science, basic ecology, and global ecology use different perspectives and approaches with different levels of detail to extrapolate information and understanding from well-studied locations to other land units.

Livestock in the rice-based economy of Office du Niger: The development potential for increased crop–livestock integration through multi-actor processes

Journal Articles & Books
Décembre, 2012
Mali
Niger

A diagnostic study of the development potential of livestock for the rice-based economy of the Office du Niger (ON) was conducted in Mali. The functioning of selected farming systems and value chains were studied by means of interviews, surveys and farmer group discussions. The findings show that in the ON rice remains the prime agricultural activity; although half of the farm households own cattle (for capital insurance and draught power), livestock management is troublesome because of a lack of grazing land and water points.

Tradeoffs in Performance of Native Warm-Season Grass Cultivars and Locally Harvested Seed Managed for Wildlife Habitat or Livestock Production

Journal Articles & Books
Décembre, 2012

Native warm-season grasses have potential to increase the ecosystem services associated with grazing lands and to provide a source of forage for livestock. In the upper Midwest, minimal region specific information is available to grass-based farmers on how to manage native pastures for long-term productivity and persistence. Wildlife biologists suggest delaying defoliations until mid-summer to preserve grassland bird habitat, yet production-based management recommendations warn against late season defoliations.

Predicting Cattle Rancher Wildlife Management Activities: An Application of the Theory of Planned Behavior

Journal Articles & Books
Décembre, 2012
États-Unis d'Amérique

Integrating wildlife management into routine livestock operations has become a priority of many wildlife conservation agencies and nongovernmental organizations because grazing lands occupy more than one-third of the United States. We surveyed 1,093 beef cattle ranchers by mail to predict cattle rancher intentions to consider wildlife management in routine cattle management activities. We framed our survey using the theory of planned behavior, whereby attitudes, subjective norms, and perceived behavioral controls explain behavioral intent.

Accounting for space and time in soil carbon dynamics in timbered rangelands

Journal Articles & Books
Décembre, 2012

Employing rangelands for climate change mitigation is hindered by conflicting reports on the direction and magnitude of change in soil organic carbon (ΔSOC) following changes in woody cover. Publications on woody thickening and deforestation, which had led to uncertainty in ΔSOC, were re-evaluated, and the dimensional-dependence of their data was determined. To model the fundamentals of SOC flux, linked SOC pools were simulated with first-order kinetics. Influences from forest development timelines and location of mature trees, with a potential for deep-set roots, were considered.