Résultats de la recherche | Land Portal

Résultats de la recherche

Showing items 1 through 9 of 218.
  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
    août, 2004

    A field study on dairy cattle farms development in low land was conducted in Cirebon district applying a survey method to record all existing dairy cattle farms in the region. Data were collected by interviewing dairy farmers and monitoring the dairy cattle farms. Descriptive approach was applied in data analysis. Constraints would accur, if problems of relatively warm environment in such low land area could not be overcome. Improvements that could be recommended include : an appropriate tropical housing, energy rich feeding and more frequent feeding.

  3. Library Resource
    Documents de politique et mémoires
    décembre, 2004
    Costa Rica

    We summarize existing theoretical claims linking poverty to rates of deforestation and then examine this linkage empirically for Costa Rica during the 20th century using an econometric approach that addresses the irreversibilities in deforestation. Our data facilitate an empirical analysis of the implications for deforestation of where the poor live. Without controlling for this, impacts of poverty per se are confounded by richer areas being different from the areas inhabited by the poor, who we expect to find on more marginal lands, for instance less profitable lands.

  4. Library Resource
    Documents de politique et mémoires
    décembre, 2004
    Costa Rica

    We review claims about the potential for carbon markets that link both payments for carbon services and poverty levels to ongoing rates of tropical deforestation. We then examine these effects empirically for Costa Rica during the 20th century using an econometric approach that addresses the irreversibilities in deforestation. We find significant effects of the relative returns to forest on deforestation rates. Thus, carbon payments would induce conservation and also carbon sequestration, and if land users were poor could conserve forest while addressing rural poverty.

  5. Library Resource
    Documents de politique et mémoires
    septembre, 2004
    Thaïlande

    Conversion of climax Dipterocarp forest for agricultural purposes has resulted in a decline in productivity of light textured soils in Northeast Thailand. To quantify the degree of chemical degradation that these soils have undergone, a survey was undertaken of six paired sites where adjacent Dipterocarp forest soils were compared to continuously cropped systems that had been under production from 37-100 years. Surface charge fingerprints along with soil chemical and physical attributes were determined on selective depth intervals.

  6. Library Resource
    Documents de politique et mémoires
    décembre, 2004

    Net farm income for all representative farms in 2013 will be lower than in 2004. Low-profit farms, which comprise 25% of the farms in the study, may not have financial resiliency to survive without off-farm income. Costs are projected to increase faster than yields, which will pressure net farm income downward. Cropland prices and cash rental rates are projected to increase slightly in all regions. Debt-to-asset ratios for most farms will increase slightly throughout the forecast period.

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