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Showing items 1 through 9 of 152.
  1. Library Resource
    Journal Articles & Books
    December, 2007
    Germany

    The amendment of the Renewable Energy Sources Act (EEG) in 2004 has established an attractive support of using renewable resources for energy production, which since then has fuelled a rapid expansion of the competitive cropping of energy maize. The regionalised agricultural sector model RAUMIS was applied to calculate expected energy maize production as well as impacts on agricultural land use, production and income. Accordingly, the energy maize acreage rises up to about 1.8 mill hectares in the long run leading to substantial land use changes.

  2. Library Resource
    Journal Articles & Books
    December, 2007
    Spain

    The magnitude of the environmental and social consequences of soil erosion and land degradation in semiarid areas of the Mediterranean region has long been recognized and studied. This paper investigates the interrelationship between land use/cover (LULC) changes and land degradation using remotely sensed and ancillary data for southeastern Spain.

  3. Library Resource
    Journal Articles & Books
    December, 2007
    Portugal

    Lack of tree regeneration and persistency of species-poor shrublands represent a growing problem across Mediterranean evergreen oak forests. What constrains forest regeneration is poorly understood, and restoration attempts have been largely unsuccessful. We assessed the contribution of four different mechanisms of tree recruitment limitation (that is, source, dispersal, germination, and establishment) in a cork oak (Quercus suber) system in southern Portugal.

  4. Library Resource
    Journal Articles & Books
    December, 2007
    Europe

    Soil erosion negatively affects crop yields and may have contributed to the collapse of ancient civilizations. Whether erosion may have such an impact on modern societies as well, is subject to debate. In this paper we quantify the relationship between crop yields and soil water available to plants, the most important yield-determining factor affected by erosion, at the European scale. Using information on the spatial distribution of erosion rates we calculate the potential threat of erosion-induced productivity losses.

  5. Library Resource
    Journal Articles & Books
    December, 2007
    France, Europe

    In this research, we propose a method for describing rural landscapes in peri urban areas and evaluating their impact on house and land prices. This method matches quantitative geography and econometric methods used for hedonic analysis. A geographical model is used for producing variables describing the landscape an observer can look at when located in a specific house or a land parcel. This model takes account of these parts of the landscape that are hidden by houses, buildings, hills, forests,. . .

  6. Library Resource
    Conference Papers & Reports
    December, 2007
    Hungary

    The paper discusses the fluctuation of the proportion of cultivation, the development of agrarian operating and organizational structure, the separation of estate tenancy and land use, along with the change of law. In the backward areas and territories with adverse endowment,further questions remain open during the temporal changes of land use. My study is not only limited to the description of changes, but also aims to illustrate general conclusions relating to the preferred structure and proportion of land use in Hungary.

  7. Library Resource
    Conference Papers & Reports
    December, 2007
    Bulgaria, Eastern Europe

    This paper analyzes how imperfections of property rights affect allocation of assetsand welfare, using micro-survey data from Bulgaria. Co-ownership of assets iswidespread in many countries due to inheritance. Central and Eastern Europe offersan interesting natural experiment to assess the effects of such rights imperfectionsbecause of the asset restitution process in the 1990s.

  8. Library Resource
    Journal Articles & Books
    December, 2007
    Switzerland, Europe

    Agri-environment schemes (AES) were introduced in Europe to mitigate the loss of biodiversity in cultivated landscapes. In Switzerland, farmers have to convert 7% of the arable land into ecological compensation areas (ECA) in order to enhance biodiversity, low-input grassland making up the major part of ECA. This study investigated during 6 years the effect of ECA grassland on butterfly diversity at the field and the landscape scales in two farming landscape units of the Swiss Plateau.

  9. Library Resource
    Journal Articles & Books
    December, 2007
    Italy

    Simulation models are widely used to assess the impacts of management and environmental variables on soil organic matter dynamics, to address questions on ecosystem sustainability and carbon cycling under global change. We tested the Century ecosystem model for two long-term experiments in north-eastern Italy: one (SF) comparing nutrient management treatments in small confined plots containing widely contrasting soil types (i.e., sandy, clay and peat) and the other (CR) involving a field study with crop rotation, nutrient, and management intensity variables.

  10. Library Resource
    Journal Articles & Books
    December, 2007
    Germany

    The production potential for bio-energy sources of the EU agriculture is quantified. In doing so, set-aside land and rededication of land for other purposes are considered. Furthermore, the simplifying hypothetical assumption is made that on the one hand in the case of subsidized surplus production beyond food self-sufficiency could be used as technical potential for the production of energy plants and on the other hand in deficit situations for typical agricultural products in the EU as e.g. grain crops, rape seed, sunflowers the production of food would have priority.

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