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Showing items 1 through 9 of 7.
  1. Library Resource

    Land usage classification: a hierarchical neural network approach

    Journal Articles & Books
    December, 2014
    France
    Rangelands, Drylands & Pastoralism
    land use
    grazing

    The classification of land usage in mountain grassland bovine areas is important for the management of forage production and grazing in grass-based livestock systems. The present paper proposes a novel, hierarchical neural network-based approach towards the classification of land usage in these areas. A survey of 72 farms was conducted in the Massif Central (France). Information was gathered on geographical characteristics and cutting and/or grazing practices on three general groups of fields: cut only, cut and grazed and grazed only fields.

  2. Library Resource

    Des prairies toujours entretenues par les élevages allaitants extensifs... Quelques enseignements

    Journal Articles & Books
    December, 2014
    France
    Rangelands, Drylands & Pastoralism
    grazing

    Permanently maintained pastures in France are often located in less desirable areas of the country and are extensively used for grass based farming, dairy farming an mountainous regions), and suckler farming (cattle and sheep, down into the valleys). These production systems are of interest because they employ practices respectful of the environment and local biodiversity. We conducted observations of 73 cattle suckler farms (12 of which use organic agriculture) located in the Massif Central.

  3. Library Resource

    Geogenic and agricultural controls on the geochemical composition of European agricultural soils

    Journal Articles & Books
    December, 2014
    Europe
    Rangelands, Drylands & Pastoralism
    grazing

    PURPOSE: Concern about the environmental impact of agriculture caused by intensification is growing as large amounts of nutrients and contaminants are introduced into the environment. The aim of this paper is to identify the geogenic and agricultural controls on the elemental composition of European, grazing and agricultural soils. MATERIALS AND METHODS: Robust factor analysis was applied to data series for Al, B, Ca, Cd, Co, Cu, Fe, K, Mg, Mn, Na, Ni, P, S, Se, Sr, U, Zn (ICP-MS) and SiO2, K2O, Na2O, Fe2O3, Al2O3 (XRF) based on the European GEMAS dataset.

  4. Library Resource

    Des prairies toujours entretenues par les élevages allaitants extensifs... Quelques enseignements

    Journal Articles & Books
    December, 2014
    France
    Rangelands, Drylands & Pastoralism
    grazing

    Permanently maintained pastures in France are often located in less desirable areas of the country and are extensively used for grass based farming, dairy farming an mountainous regions), and suckler farming (cattle and sheep, down into the valleys). These production systems are of interest because they employ practices respectful of the environment and local biodiversity. We conducted observations of 73 cattle suckler farms (12 of which use organic agriculture) located in the Massif Central.

  5. Library Resource

    Measurement methods on pastures and their use in environmental life-cycle assessment

    Journal Articles & Books
    December, 2014
    Germany
    Rangelands, Drylands & Pastoralism
    land management
    grazing

    Grassland agriculture plays an important role for livestock production and land management throughout the world. It is challenging to estimate the available feed on pasture plots. For this study, a rising plate meter was calibrated in swards of the organic experimental station of Trenthorst in northern Germany to calculate grazing intake of cattle and to determine biomass regrowth.

  6. Library Resource

    Long-term Impacts of Contrasting Management of Large Ungulates in the Arctic Tundra-Forest Ecotone: Ecosystem Structure and Climate Feedback

    Journal Articles & Books
    December, 2014
    Finland, Norway
    Rangelands, Drylands & Pastoralism
    land cover
    grazing

    The arctic forest-tundra ecotone (FTE) represents a major transition zone between contrasting ecosystems, which can be strongly affected by climatic and biotic factors. Expected northward expansion and encroachment on arctic tundra in response to climate warming may be counteracted by natural and anthropogenic processes such as defoliating insect outbreaks and grazing/browsing regimes.

  7. Library Resource

    Evaluation of Landscape-Level Grazing Capacity for Domestic Sheep in Alpine Rangelands

    Journal Articles & Books
    December, 2014
    Norway
    Rangelands, Drylands & Pastoralism
    land cover
    grazing
    rangelands

    Balancing the number of grazing animals with the level of plant resources is a core issue in grazing management. Complete, full-coverage vegetation surveys are often used for this purpose, but these are expensive undertakings. We have presented a method to downscale information from regional sampling surveys by poststratification using a land cover map derived from satellite-based measures of reflectance values. This approach opens new prospects for landscape-level evaluation of productivity.

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