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There are 2, 539 content items of different types and languages related to système d'exploitation agricole on the Land Portal.
Displaying 973 - 984 of 1717

Exploring options in reforming South African land ownership: Opportunities for sharing land, labour and expertise

Journal Articles & Books
Décembre, 2013
Afrique du Sud
Afrique australe

In many developing countries, land ownership remains a subject of contention. In South Africa, notwithstanding the strides that have been made to foster equitable land ownership, land reform policies have been unsuccessful in delivering land to the poor majority. Due to the nature of agriculture as a source of food production and national security, and the lack of farming skills and related competencies’ equilibrium, programmes intended to deliver land to black people have been inadequate in their reach.

Carbon sequestration in dryland ecosystems of West Asia and North Africa

Journal Articles & Books
Décembre, 2002
Afrique
Afrique septentrionale

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.

European agricultural landscapes, common agricultural policy and ecosystem services: a review

Journal Articles & Books
Décembre, 2014
Europe

Since the 1950s, intensification and scale enlargement of agriculture have changed agricultural landscapes across Europe. The intensification and scale enlargement of farming was initially driven by the large-scale application of synthetic fertilizers, mechanization and subsidies of the European Common Agricultural Policy (CAP). Then, after the 1990s, a further intensification and scale enlargement, and land abandonment in less favored areas was caused by globalization of commodity markets and CAP reforms.

Long-term impacts of season of grazing on soil carbon sequestration and selected soil properties in the arid Eastern Cape, South Africa

Journal Articles & Books
Décembre, 2015
Afrique du Sud
Afrique australe

BACKGROUND AND AIMS: The Karoo biomes of South Africa are major feed resources for livestock farming, yet soil nutrient depletion and degradation is a major problem. The objective of this study was to assess impacts of long-term (>75 years) grazing during spring (SPG), summer (SUG), winter (WG) and exclosure (non-grazed control) treatments on soil nutrients, penetration resistance and infiltration tests.

Do Wealth Gains from Land Appreciation Cause Farmers to Expand Acreage or Buy Land?

Journal Articles & Books
Décembre, 2014
États-Unis d'Amérique

Recent increases in farm real estate values in the United States have increased farm equity. By exploiting periods of high and low appreciation that caused various increases in wealth for farmers owning various shares of their farmland, we examine whether U.S. grain farmers expanded their acres harvested or acres owned in response to an increase in their land wealth. We find that land wealth had little effect on farm size. However, for similarly-sized farms, a larger ownership share (10 percentage points) led to an increase in the growth of land owned (2 percentage points).

Impact of land cover homogenization on the Corncrake (Crex crex) in traditional farmland

Journal Articles & Books
Décembre, 2015
Roumanie
Europe orientale

CONTEXT: The loss of landscape heterogeneity is causing declines of farmland biodiversity around the world. Traditional farmland regions are often highly heterogeneous and harbor high biodiversity, but are under threat of land cover homogenization due to changing agricultural practices. One species potentially affected by landscape homogenization is the Corncrake (Crex crex), which is threatened in Western Europe but remains widespread in the traditional farmland regions of Eastern Europe.

Linking farming systems to landscape change: An empirical and spatially explicit study in southern Chile

Journal Articles & Books
Décembre, 2010
Chili

In rural areas, land use and cover change is often the cumulative result of individual farmer decisions. The goal was to construct a spatial typology of farming systems and assess their influence on the extent and spatial distribution of deforestation, forest re-growth, and agriculture expansion in southern Chile between 1999 and 2007. We present a farm typology and its spatial rendering through the combination of farm-cadastral information and land cover and change data. Using multivariate statistical methods, four types were identified.

Improved fallows: a case study of an adaptive response in Amazonian swidden farming systems

Journal Articles & Books
Décembre, 2013

Many smallholders in the Amazon employ swidden (slash-and-burn) farming systems in which forest or forest fallows are the primary source of natural soil enrichment. With decreasing opportunities to claim natural forests for agriculture and shrinking landholdings, rotational agriculture on smaller holdings allows insufficient time for fallow to regenerate naturally into secondary forest.

“Brasilience:” Assessing Resilience in Land Reform Settlements in the Brazilian Cerrado

Journal Articles & Books
Décembre, 2015
Brésil

This study assessed the socioecological resilience of family farms in three land reform settlements in Mato Grosso, Brazil, located in the ecologically threatened Cerrado biome. Using focus groups, a household survey, and analysis of soil samples we characterized farming systems and quantified indicators of resilience, which we contextualized with a qualitative analysis of distributions of power and access to rights and resources.

Rangeland management impacts on the properties of clayey soils along grazing gradients in the semi-arid grassland biome of South Africa

Journal Articles & Books
Décembre, 2013
Afrique du Sud
Afrique australe

The grassland biome of South Africa is a major resource for livestock farming; yet the soils of these rangelands are stressed differently by various management systems. The aim of this study was to investigate how basic soil properties respond to different management systems. For this purpose we sampled rangeland management systems under communal (continuous grazing), commercial (rotational grazing) and land reform (mixture of grazing systems) farming.

Landowner Characteristics Associated with Receiving Information About Invasive Plants and Implications for Outreach Providers

Journal Articles & Books
Décembre, 2008

Based on a survey of woodland owners in West Virginia, we examined the possibility of differences in the characteristics of those who had and had not received information about local invasive plants and implications for outreach providers. Findings suggest that landowners who farmed on their property, held recreation objectives, and lived in the local area were significantly more likely than their counterparts to have received information. A majority of landowners with these characteristics, however, had not heard or read such information.

264 years of change and persistence in an agrarian landscape: a case study from the Swiss lowlands

Journal Articles & Books
Décembre, 2015
Europe

CONTEXT: Century-long interaction between societies and their environment has shaped the cultural landscapes across Europe. Specific farming systems have persisted for long periods, and their abandonment has led to far-reaching and rapid changes in patterns of land use and land cover. OBJECTIVE: Taking the example of the municipality of Limpach, located in the Swiss lowlands, we studied the dynamics of cultural landscape and related driving forces in a long-term perspective.