Résultats de la recherche | Land Portal

Résultats de la recherche

Showing items 1 through 9 of 3.
  1. Library Resource
    Articles et Livres
    décembre, 2004
    Brésil

    The vegetation cover plays a key role in protection and conservation of natural resources, particularly concerning soils. This study had as objective to analyze space and time dimensions of anthropic influence on the vegetation cover in part of the semi-arid region of the Ceará State, Brazil. LANDSAT TM-5 satellite images of 1985 and 1994 combined with geoprocessing techniques were used to verify the hypothesis of intensification of environmental degradation. Maps of the vegetation cover, land use, soils, and hydrography were elaborated.

  2. Library Resource
    Articles et Livres
    décembre, 2004
    Inde, Brésil, Chine, Argentine

    There are two mechanisms by which modern genetically modified organism (GMO) products can affect productivity in developing countries. The first is the Genes for Rent mechanism where a recipient country agrees with a GMO company to incorporate a GMO product (e.g., a Bt gene in cotton varieties) and pay a technology fee. The second is the Transgenic Breeding mechanism in which National Agricultural Research System (NARS) breeders use modern biotech methods marker-aided breeding, genetic maps, and genomics research to produce GMO traits of economic value in crop varieties.

  3. Library Resource
    Articles et Livres
    décembre, 2004
    Brésil

    The Large-scale Biosphere-Atmosphere Experiment in Amazonia (LBA) is a multinational, interdisciplinary research program led by Brazil. Ecological studies in LBA focus on how tropical forest conversion, regrowth, and selective logging influence carbon storage, nutrient dynamics, trace gas fluxes, and the prospect for sustainable land use in the Amazon region. Early results from ecological studies within LBA emphasize the variability within the vast Amazon region and the profound effects that land-use and land-cover changes are having on that landscape.

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