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Mostrando ítems 1 a 9 de 725.
  1. Library Resource
    Manual y guías
    Diciembre, 2000
    Global
  2. Library Resource
    Artículos de revistas y libros
    Diciembre, 2000
    Nigeria, África, África occidental

    The importance of cassava relative to other crops in the cropping system was almost total; cassava was present in 70% of arable fields; maize and beans or peas were each present in 13% of arable fields and all other crops were present in 4%. Cassava was produced mostly for sale, yet it was not as important around market centers as in remote areas because imported rice and wheat products were easily accessible.

  3. Library Resource
    Documentos de conferencias e informes
    Diciembre, 2000
    Camerún, África, África Central

    In sub-Saharan Africa, intensification of agriculture and rational use of arable land are essential for long-term growth (Gros, 1979, Johnston, 1990, Oluf et al., 990). Extensive cultivation methods and the population explosion are pushing the limits of cultivated land every day; deforestation accelerates; the productive capacity of the land is reduced

  4. Library Resource
    Informes e investigaciones
    Diciembre, 2000
    Rwanda

    Rwanda is currently in transition from a period of emergency to one of development following the 1994 war and genocide. Before the tragic events of 1994, the Agricultural Statistics Division (DSA) of the Ministry of Agriculture, Animal Resources and Forestry (MINAGRI) maintained a comprehensive database of agricultural statistics. The DSA was responsible for providing information on agricultural policy based on annual surveys of rural households. These surveys, which were interrupted in 1994 were resumed in 1999 by the Food Security Research Project (FSRP) and the DSA of MINAGRI.

  5. Library Resource
    Artículos de revistas y libros
    Diciembre, 2000
    Finlandia, Alemania, Europa, Europa occidental

    Since 1995, experiences have been gathered with the calculation of National Greenhouse Gas Inventories in Germany. Because only marginal changes of the total forested area occur in Germany, relevant changes of the balance of greenhouse gases in the forest sector are related to forest management. It was found that the increment of wood by far exceeds the harvested timber volume. Therefore, forests in Germany currently represent a significant sink for carbon (8-9 Mt C per year).

  6. Library Resource
    Artículos de revistas y libros
    Diciembre, 2000
    Finlandia, Europa, Europa occidental

    Ministry of the Environment is coordinating matters related to the unitéd Nation Framework Convention on Climate Change. National reporting of greenhouse gas inventories for land-use change and forestry category utilises forest inventory results with appropriate studies on biomass allocation and wood properties as well as national wood consumption statistics allowing to use country-specific values instead of overall default values provided in the Intergovernemental Panel on Climatic Change guidelines.

  7. Library Resource
    Artículos de revistas y libros
    Diciembre, 2000
    Finlandia, Irlanda, Europa, Europa occidental

    Ireland has a rapidly expanding forest estate which covers some 9/ of the land area. It is government policy to increase this to 17/ by the year 2030. Preliminary studies suggest that forestry activities have the potential to contribute significantly to the mitigation of greenhouse gas emissions. Although some studies have been carried out the determination of the carbon stores and sinks in Irish forests will require a considerable research effort in the future.

  8. Library Resource
    Artículos de revistas y libros
    Diciembre, 2000
    México

    Identifying the appropriate germplasm to be improved is a key component of any participatory breeding effort because of its implications for impacts on social welfare and genetic diversity. This paper describes a method developed to select a subset of 17 populations for a participatory breeding project from a set of 152 maize landraces. The larger set of landraces was collected in order to characterize, for conservation purposes, the maize diversity present in the Central Valleys of Oaxaca, Mexico.

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