Resultados de la búsqueda | Land Portal

Resultados de la búsqueda

Mostrando ítems 1 a 9 de 6.
  1. Library Resource
    Artículos de revistas y libros
    Agosto, 2016
    Bolivia, Paraguay, Brasil, Argentina, América del Sur

    Different drivers and places of land use change in South America have often been studied in isolation. Evidence suggests, however, that in many instances, both places and drivers are becoming increasingly interconnected. The growing diversification and internationalization of agricultural commodity chains is creating new linkages across production frontiers and sectors that have important implications for conservation.

  2. Library Resource
    Artículos de revistas y libros
    Diciembre, 2015
    Brasil

    Land degradation reducing vegetation cover may affect the soil surface‐active fauna because both aboveground and belowground invertebrates depend on complex plant communities. In this study, we evaluated the effect of land degradation and restoration on soil fauna in northeast Brazil. Sites differed in degradation status: native vegetation, moderately degraded land, highly degraded land, and land under restoration for 4 years.

  3. Library Resource
    Artículos de revistas y libros
    Diciembre, 2015
    Chile

    Andisols present exceptional physical properties, making up 24%), however, during summer they can reach volumetric water contents near to the permanent wilting point quickly at a depth of 5 cm. The water table altitude was directly related to the temporal changes of θFᵢₑₗd measured at a depth of 50 cm, highlighting the fact that the saturated and unsaturated zones are connected.

  4. Library Resource
    Artículos de revistas y libros
    Diciembre, 2008
    Perú

    Up until the end of the 1980s the Peruvian public administration played a central role in irrigation systems throughout the country; this changed in 1989 when operational management of the systems was transferred to water users associations (WUAs). This sudden move required new management capacities for such organizations, demands that were not catered for at the time.

  5. Library Resource
    Artículos de revistas y libros
    Diciembre, 2014
    Brasil

    Proper assessment of environmental quality or degradation requires knowledge of how terrestrial C pools respond to land use change. Forest plantations offer a considerable potential to sequester C in aboveground biomass. However, their impact on initial levels of soil organic carbon (SOC) varies from strong losses to gains, possibly affecting C balances in afforestation or reforestation initiatives.

  6. Library Resource
    Artículos de revistas y libros
    Diciembre, 2008
    Filipinas, África, América central, Asia, América del Sur

    A major development concern of the 1970s and 1980s was 'the other energy' or 'woodfuel crisis'. Woodfuel use in developing regions of Africa, Asia, and Latin America was believed to be a key factor in tropical deforestation, and the loss of forests was projected to result in widespread woodfuel shortages. In recent years, however, it has become apparent that woodfuel production is seldom a direct cause of deforestation (although it may be a by-product), and that most woodfuel demand is met by trees and shrubs growing outside of forest areas.

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