Résultats de la recherche | Land Portal

Résultats de la recherche

Showing items 1 through 9 of 47.
  1. Library Resource
    Articles et Livres
    décembre, 2007

    Agricultural activities and their complex effects on nature conservation, and the services that ecosystems deliver to humans are controversial. We present an overview of land abandonment, its driving forces and its consequences for landscape, biodiversity and humans. A descriptive metaanalysis of independently published studies highlighted the fact that the abandonment of agricultural land is a phenomenon mostly driven by socio-economic factors such as immigration into areas where new economic opportunities are offered to rural people.

  2. Library Resource
    Articles et Livres
    décembre, 2008

    As carbon becomes a valuable commodity traded in markets for greenhouse-gas emissions, there will be incentives to adopt land uses that capture carbon payments as well as produce other marketable outputs, including biofuels. These production systems may be more sustainable than many of those in current use, but there is also the risk that the growing demand for biofuels will cause land degradation, deforestation and food scarcity.

  3. Library Resource
    Articles et Livres
    décembre, 2017
    Asie

    The Fertile Crescent (FC) is a high biodiversity region where most temperate-zone agricultural species originated and were first domesticated. A favourable environment, a special plant community and an adaptive population combined to initiate the transition from a hunter-gatherer economy to one based on agriculture and food production in the Fertile Crescent.

  4. Library Resource
    Articles et Livres
    décembre, 2007

    Sodic and alkali soils are characterized by the occurrence of excess sodium (Nasup+/sup) to levels that can adversely affect soil structure and disturb the availability of nutrients for plant growth. Structural problems in these soils are created by certain physical processes (slaking, swelling and dispersion of clay minerals) and specific conditions (surface crusting and hardsetting), which affect water and air movement, seedling emergence, root penetration, runoff and erosion, as well as tillage and sowing operations.

  5. Library Resource
    Articles et Livres
    décembre, 2006

    Salinization of soils is a major impediment to their optimal utilization in many arid and semi-arid regions throughout the world. In several large irrigation schemes, salinity-induced land degradation has increased steadily over the last few decades with concurrent reductions in agricultural productivity and sustainability. Currently, saline soils occur within at least 100 countries. These soils need explicit approaches in their amelioration since soil salinization cannot be reduced by routine irrigation and crop management practices.

  6. Library Resource
    Articles et Livres
    décembre, 2006

    Academics and policy-makers seeking to assess public perception and preferences of landscape face major challenges conceptually, methodologically and institutionally. The terms ‘landscape’, ‘public’ and ‘perception’ are contested and generate their own discourses and extensive literature. However, set within multi-disciplinary and interdisciplinary blends of natural and social scientificresearch, considerable progress has been made on all fronts. This paper seeks to untangle the complex array of conceptual and methodological frameworks that have evolved in landscape perception.

  7. Library Resource
    Articles et Livres
    décembre, 2014
    Brunéi Darussalam

    Conventional soil survey information is often unclear except to specialists. An approach using soil toposequences and a soil identification key was used to aid the translation of soil survey information into a form suitable for a nonspecialist audience with a case study from Brunei. Soil Taxonomy was used to characterize the major soil types; however, to assist end users, a complementary special‐purpose soil classification system was developed in the form of a soil identification key using plain language terms in English that were also translated into Malay.

  8. Library Resource
    Articles et Livres
    décembre, 2007

    The concepts of adaptive management and participatory forest management (PFM) reflect an increasingly holistic relationship between society and its forests. Adaptiveness depends on learning processes. This review considers the ways in which PFM has been assessed in recent literature and focuses on the role of learning, through cross-cutting quantitative analyses, project monitoring and evaluation, and participatory research and experimentation.

  9. Library Resource
    Articles et Livres
    décembre, 2012
    États-Unis d'Amérique, Chine, Europe, Afrique

    Over the past decade, sustainable development has become a pivotal element of innovation in various areas. Industrial biotechnology - through its potential to reform our energy resources - is of specific interest given its controversial reception. With the ongoing shift from a fossil-fuel-based to a bio-based economy, the demand for biomass production for biofuels and biomaterials has increased dramatically. Although countries such as the USA may have enough land-surface available, it is not likely that the necessary biomass to 'fuel' Europe can be grown domestically.

  10. Library Resource
    Articles et Livres
    décembre, 2017
    Canada

    Variants of Indigenous forest management reflect distinct historical and political-economic contexts. Indigenous forest management was largely unrecorded in the colonial period and, in the present, can range from industrial to ecosystem-based forest management, autonomous management and rentier practices. Evidence of Indigenous forest management has assumed political importance in those nation-states that require historical evidence of past land use and occupancy as the basis for negotiation of Indigenous-titled lands.

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