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There are 2, 539 content items of different types and languages related to sistema de exploração agrícola on the Land Portal.
Displaying 961 - 972 of 1705

proximity of a field plot and land-use choice: implications for land consolidation

Journal Articles & Books
Dezembro, 2013

Traditional methods in agricultural economics and agricultural engineering have yielded mixed results when specifying the costs of an unfavourable parcel structure. Concepts related to travel costs and the production function are frequently applied when the costs of farming distant parcels are examined. However, farmers’ perspective regarding preferences for land use is ignored or partly overlapped by predictions made by researchers.

Land Cover Transition in Northern Tanzania

Journal Articles & Books
Dezembro, 2016
Tanzania
África

Land conversion in sub‐Saharan Africa has profound biophysical, ecological, political and social consequences for human well‐being and ecosystem services. Understanding the process of land cover changes and transitions is essential for good ecosystem management policy that would lead to improved agricultural production, human well‐being and ecosystems health. This study aimed to assess land cover transitions in a typical semi‐arid degraded agro‐ecosystems environment within the Pangani river basin in northern Tanzania.

Sustainable Land Management (SLM) Practices in Drylands: How Do They Address Desertification Threats?

Journal Articles & Books
Dezembro, 2014

Managing land sustainably is a huge challenge, especially under harsh climatic conditions such as those found in drylands. The socio-economic situation can also pose challenges, as dryland regions are often characterized by remoteness, marginality, low-productive farming, weak institutions, and even conflict. With threats from climate change, disputes over water, competing claims on land, and migration increasing worldwide, the demands for sustainable land management (SLM) measures will only increase in the future.

Constraints to farmers managing dryland salinity in the central wheatbelt of Western Australia

Journal Articles & Books
Dezembro, 2009

There is an increasingly well-founded understanding of the chief drivers and constraints to widespread adoption by Australian landholders to practices to manage dryland salinity. However, each specific situation depends on a range of biophysical, social and economic factors. Such is the case in this study that examines farmers' salinity management in the Wallatin-O'Brien catchments in the low-medium rainfall zone of the Western Australian wheatbelt.

role of grasslands in food security and climate change

Journal Articles & Books
Dezembro, 2012

BackgroundGrasslands are a major part of the global ecosystem, covering 37 % of the earth's terrestrial area. For a variety of reasons, mostly related to overgrazing and the resulting problems of soil erosion and weed encroachment, many of the world's natural grasslands are in poor condition and showing signs of degradation. This review examines their contribution to global food supply and to combating climate change.ScopeGrasslands make a significant contribution to food security through providing part of the feed requirements of ruminants used for meat and milk production.

Valuing local knowledge as a source of expert data: Farmer engagement and the design of decision support systems

Journal Articles & Books
Dezembro, 2012

Engagement with farmers and landowners is often undertaken by the research community to obtain information relating to typical land, livestock and enterprise management and generally centres on responses to questionnaire surveys. Farmers and land managers are constituted as expert observers of ground-level processes and provide diverse information on farming practices, enterprise economics and underpinning attitudes towards risk.

Benefits of wildlife-based land uses on private lands in Namibia and limitations affecting their development

Journal Articles & Books
Dezembro, 2013
Namíbia
África

Legislative changes during the 1960s–1970s granted user rights over wildlife to landowners in southern Africa, resulting in a shift from livestock farming to wildlife-based land uses. Few comprehensive assessments of such land uses on private land in southern Africa have been conducted and the associated benefits are not always acknowledged by politicians. Nonetheless, wildlife-based land uses are growing in prevalence on private land. In Namibia wildlife-based land use occurs over c. 287,000 km².

Agroforestry and the search for alternatives to slash-and-burn cultivation: From technological optimism to a political economy of deforestation

Journal Articles & Books
Dezembro, 2009

Launched in 1994, the Alternatives to Slash-and-Burn Programme is a multidisciplinary collaborative research effort aimed at addressing the issue of deforestation. This article analyzes the genesis and the history of this research effort and the causes of its successes and failures. I will show that despite the genuine commitment of the ASB Programme to achieve comprehensive analysis linking the social and the biophysical realms, its conclusions and recommendations were biased in favor of biophysical models whose adoption by farmers remained low.

The fate of employees in different status classes after decollectivization from early 1990s until 2005 in one Estonian, Latvian and Lithuanian kolkhoz. First results

Conference Papers & Reports
Dezembro, 2008
Estónia
Letónia
Lituânia
Finlândia

Having done research on agricultural decollectivization and its consequences since 1992, Ilkka Alanen and his colleagues has accumulated a wealth of knowledge on the coping strategies people adopted in order to survive in the Baltic countries and elsewhere (See Alanen 1998, Alanen et al 2001 and Alanen 2004a). The problems turned out to be much more difficult than the reforms planers anticipated, and that some of the initial failures still overshadow people’s lives.

Heterogeneity in land resources and diversity in farming practices in Tigray, Ethiopia

Journal Articles & Books
Dezembro, 2006
Etiópia

The management of soils is an important issue for policy makers in Ethiopia. However, most of the interventions designed to conserve the soil resources have fallen short of the expectations, performing impressively in the short run, but proving unsustainable on a long-term basis. There are no simple explanations for the failure of these interventions to reverse soil degradation, but it has been evident for some time that there is an uneasy connection between 'objective' assessments of the state of the land and the way this information is used in the policy-making processes.

Long-term perceptions of project-affected persons: a case study of the Kotmale Dam in Sri Lanka

Journal Articles & Books
Dezembro, 2013
Sri Lanka

Many of the negative consequences of dam-related involuntary displacement of affected communities can be overcome by careful planning and by providing resettlers with adequate compensation. In this paper the resettlement scheme of the Kotmale Dam in Sri Lanka is revisited, focusing on resettlers' positive perceptions. Displaced communities expressed satisfaction when income levels and stability were higher in addition to their having access to land ownership titles, good irrigation infrastructure, water, and more opportunities for their children.

Carbon sequestration in dryland ecosystems of West Asia and North Africa

Journal Articles & Books
Dezembro, 2002
África
Norte de África

The West Asia–North Africa (WANA) region has a land area of 1.7 billion ha, and a population of 600 million. Desertification and soil degradation are severe problems in the region. The problem of drought stress is exacerbated by low and erratic rainfall and soils of limited available water holding capacity and soil organic carbon (SOC) content of less than 0.5 per cent. The SOC pool of most soils has been depleted by soil degradation and widespread use of subsistence and exploitative farming systems.