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IssuesOrdenación de tierrasLandLibrary Resource
There are 8, 235 content items of different types and languages related to Ordenación de tierras on the Land Portal.
Displaying 3457 - 3468 of 5231

Tracking the rhythm of the seasons in the face of global change: phenological research in the 21st century

Journal Articles & Books
Diciembre, 2009

Phenology is the study of recurring life‐cycle events, classic examples being the flowering of plants and animal migration. Phenological responses are increasingly relevant for addressing applied environmental issues. Yet, challenges remain with respect to spanning scales of observation, integrating observations across taxa, and modeling phenological sequences to enable ecological forecasts in light of future climate change.

Integrating LANDIS model and a multi-criteria decision-making approach to evaluate cumulative effects of forest management in the Missouri Ozarks, USA

Journal Articles & Books
Diciembre, 2012
Estados Unidos de América

Public forest management requires consideration of numerous objectives including protecting ecosystem health, sustaining habitats for native communities, providing sustainable forest products, and providing noncommodity ecosystem services. It is difficult to evaluate the long-term, cumulative effects and tradeoffs these and other associated management objectives.

Aboriginal hunting buffers climate-driven fire-size variability in Australia’s spinifex grasslands

Journal Articles & Books
Diciembre, 2012
Australia

Across diverse ecosystems, greater climatic variability tends to increase wildfire size, particularly in Australia, where alternating wet–dry cycles increase vegetation growth, only to leave a dry overgrown landscape highly susceptible to fire spread. Aboriginal Australian hunting fires have been hypothesized to buffer such variability, mitigating mortality on small-mammal populations, which have suffered declines and extinctions in the arid zone coincident with Aboriginal depopulation.

Comparison of 2 techniques for monitoring vegetation on military lands

Journal Articles & Books
Diciembre, 2003

The U.S. Army is responsible for preparing a well-trained combat force while maintaining the ecological diversity and integrity of the lands it manages. The ability to efficiently collect data that accurately capture plant community diversity and percent composition is imperative to proper monitoring and land management of military lands. To ensure that the dual goals of military training and land stewardship are met on an army-wide basis, the U.S. Army Land Condition-Trend Analysis (LCTA) Program was developed.

Supplying Carbon Sequestration From West African Rangelands: Opportunities and Barriers

Journal Articles & Books
Diciembre, 2010
Burkina Faso

The emergence of markets for mitigation of climate change presents new opportunities for increasing economic and ecological returns to rangelands in developing countries. Improving rangeland management is a potentially significant source of mitigation from sequestration. It is appealing due to the likely links to sustainable agricultural development and poverty reduction. Many of the changes needed to sequester carbon are also associated with improved rangeland productivity and incomes.

Effect of changing groundwater levels caused by land-use changes on greenhouse gas fluxes from tropical peat lands

Journal Articles & Books
Diciembre, 2005
Indonesia
Global

Monthly measurements of carbon dioxide (CO2), methane (CH4) and nitrous oxide (N2O) fluxes in peat soils were carried out and compared with groundwater level over a year at four sites (drained forest, upland cassava,upland and lowland paddy fields) located in Jambi province, Indonesia. Fluxes from swamp forest soils were also measured once per year as the native state of this investigated area.

Incorporating canopy gap-induced growth responses into spatially implicit growth model projections

Journal Articles & Books
Diciembre, 2012
Canadá
Estados Unidos de América
América Septentrional

Public land management across North America now incorporates multiple ecological and social values and has led to use of increasingly complex silvicultural systems, such as those designed to emulate natural disturbance regimes, in an effort to manage for this wider variety of objectives. In the eastern United States and Canada, canopy gap-based silvicultural systems are often used to promote and sustain intra-stand variability in temporal and spatial patterns.

Cropping strategies, soil fertility investment and land management practices by smallholder farmers in communal and resettlement areas in Zimbabwe

Journal Articles & Books
Diciembre, 2009
Zimbabwe

Three smallholder villages located in typical communal (from 1948), old (1987) and new (2002) resettlement areas, on loamy sand, sandy loam and clay soils, respectively, were selected to explore differences on natural resource management and land productivity. Focus group discussions and surveys were carried out with farmers. Additionally, farmers in three wealth classes per village were chosen for a detailed assessment of their main production systems.

Soil organic carbon stocks on long-term agroecosystem experiments in Canada

Journal Articles & Books
Diciembre, 2010
Canadá

Several long-term agroecosystem experiments (LTAEs) across Canada have been maintained for periods of up to a century. Much scientific knowledge of changes in soil properties through time has been learned from these few, highly productive LTAEs. We determined the effects of land management changes (LMC) on soil organic carbon (SOC) by re-sampling 27 LTAEs across Canada using identical sampling and laboratory protocols.

International Commission on Irrigation and Drainage (ICID): its objectives, achievements and plans

Journal Articles & Books
Diciembre, 2009

The International Commission on Irrigation and Drainage (ICID), a global network organization with 106 member countries in its fold, is dedicated to the promotion of best practices in water for agriculture, and addresses water supply and management for food production, including drainage and flood control. While striving to improve water and land management, and enhancing the world supply of food and fibre, ICID takes on board environmental concerns and seeks sustainable solutions.

Improving Estimates of Rangeland Carbon Sequestration Potential in the US Southwest

Journal Articles & Books
Diciembre, 2010
Estados Unidos de América

Rangelands make an important contribution to carbon dynamics of terrestrial ecosystems. We used a readily accessible interface (COMET VR) to a simulation model (CENTURY) to predict changes in soil carbon in response to management changes commonly associated with conservation programs.