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Mostrando ítems 1 a 9 de 76.
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Artículos de revistas y libros
Argelia, Burkina Faso, Nigeria, Mauritania, Malí, Senegal, Etiopía, Níger, Uruguay, Eritrea, Camerún, Chad, República Centroafricana, Sudán del Sur, Sudán, Brasil, África, América del Sur
For over a decade, the globalisation of environmental, economic and social issues has induced rapid modification in agriculture and land. These changes raise the question of future extensive livestock systems in regards to the worldwide challenge to double livestock production by 2050 in ways which are safe for the environment. In order to better understand and follow modification processes, a comparative study of livestock systems and land dynamics has been carried out on seven case studies on three continents through the use of a common grid.
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Artículos de revistas y libros
Argelia, Sudán, Burkina Faso, Nigeria, Mauritania, Chad, Malí, Camerún, Senegal, República Centroafricana, Sudán del Sur, Etiopía, Níger, Eritrea
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Artículos de revistas y libros
México, Canadá, Guatemala, África septentrional, Asia meridional
This paper discusses the centers of origin and diversity for bread wheat; sketches historical patterns in the sources and use of wheat genetic resources in modern plant breeding; identifies and compares indicators of genetic diversity used by social and biological scientists; reviews the relationship of wheat genetic diversity to yield stability and vulnerability to disease; develops a profile of the structure of genetic variation in wheat in the developing world today; and investigates how scientific plant breeding has influenced the structure of genetic variation among the major bread whe
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Artículos de revistas y libros
This study examines the socioeconomic features that underpin the expansion of groundwater-dependent irrigation in Northern State, Sudan. Groundwater development in the region serves as an economic lifeline given the poor Nile-based irrigation infrastructure and future changes in Nile hydrology. Groundwater-dependent irrigation is found to be expanding in previously uncultivated regions increasingly distant from the Nile.
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Library Resource
Artículos de revistas y libros
Argelia, Sudán, Burkina Faso, Nigeria, Mauritania, Chad, Malí, Camerún, Senegal, República Centroafricana, Sudán del Sur, Etiopía, Níger, Eritrea
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Artículos de revistas y libros
Argelia, Francia, Nigeria, Mauritania, Malí, Burkina Faso, Senegal, Etiopía, Níger, Eritrea, Sudán, Camerún, República Centroafricana, Sudán del Sur, Chad, Europa, África, América central, América del Sur
We propose a flexible and adaptable framework to assist the quick design of models dealing with the durability of the extensive livestock systems at the territorial scale. This metamodel results from the collaborative design starting from MAS developed on 7 sites in Latin America, France and Senegal. It is composed of four packages: Agent, Community, Space and Vegetation-Herd. We illustrate these packages with examples extracted from the various models. The role of this tool is discussed in order to show its advantages and its limits
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Artículos de revistas y libros
This paper presents and analyses land use changes in the periurban areas of Meknes, Morocco, focusing on disappearing fertile and productive farmland. Although identified by the Moroccan public policies, the concern for periurban farmland protection is not the government's first priority. It remains behind economic development and housing of low-incomes. In Meknes, where land tenure remains very complex, urban growth is impacting high-quality-soil farmland while the land market is characterised by increasing farmland values and weak public policy regulation.
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Artículos de revistas y libros
Argelia, Sudán, Burkina Faso, Nigeria, Mauritania, Chad, Malí, Camerún, Senegal, República Centroafricana, Sudán del Sur, Etiopía, Níger, Eritrea, África occidental
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Library Resource
Artículos de revistas y libros
Argelia, Francia, Nigeria, Mauritania, Malí, Burkina Faso, Senegal, Etiopía, Níger, Eritrea, Sudán, Camerún, República Centroafricana, Sudán del Sur, Chad, Europa, África, América central, América del Sur
We propose a flexible and adaptable framework to assist the quick design of models dealing with the durability of the extensive livestock systems at the territorial scale. This metamodel results from the collaborative design starting from MAS developed on 7 sites in Latin America, France and Senegal. It is composed of four packages: Agent, Community, Space and Vegetation-Herd. We illustrate these packages with examples extracted from the various models. The role of this tool is discussed in order to show its advantages and its limits
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Library Resource
Artículos de revistas y libros
Argelia, Sudán, Burkina Faso, Nigeria, Mauritania, Malí, Indonesia, Senegal, Etiopía, Níger, Eritrea, Malasia, Camerún, Tanzania, Brunei Darussalam, República Centroafricana, Sudán del Sur, Chad, Viet Nam, África subsahariana
Land use change has become increasingly acknowledged as an important issue in terms of understanding the processes of global change. Hence, land use decision-making by smallholder communities in developing countries become a vital part of the broader comprehension of environmental and social change that are related to the change processes at the global scale. A wide range of analytical and conceptual frameworks has been developed to facilitate and sharpen such analyses, ranging from very theoretical to directly operational approaches.
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