Résultats de la recherche | Land Portal

Résultats de la recherche

Showing items 1 through 9 of 1375.
  1. Library Resource
    Articles et Livres
    décembre, 2016

    Context: Various species of forest trees are commonly used for ornamental purposes and are therefore frequently found in nonforest ecosystems. They constitute an important component of the so-called trees outside forests (TOF).

  2. Library Resource
    Articles et Livres
    décembre, 2008

    The degradation of soils with high sand content, in the southwest of the state of Rio Grande do Sul, is due to the vegetal cover withdrawal, forming sandy areas called "areais", which pose a risk to animal husbandry and the prairie ecosystem. A technique of revegetation with cover crops such as Avena strigosa Schieb. and Lupinus albescens H. et Arn., was developed to reduce the soil particle movement by eolic erosion.

  3. Library Resource
    Articles et Livres
    décembre, 2015

    In many regions of the world, soil erosion is one of the main land degradations processes that reduce the soil productivity by removing fertile topsoil layers, thus decreasing levels of organic matter and the nutrients. Therefore erosion researches constitute an important part of the research on the soils. The erosion risk of soils can be evaluated directly carried out in the field, greenhouses or laboratory by means of some experiments or indirectly based on developing and applying models that gives risk expectations for large areas.

  4. Library Resource
    Articles et Livres
    novembre, 2016

    This study focuses on land use in the tsunami inundation area caused by the Great East Japan Earthquake, particularly land use history in the tsunami-affected area. Hanagama District, Yamamoto City, Miyagi prefecture, was selected as the study area. Land use were examined using aerial photographs taken in 1975, 2010 and 2013. Relationships between land use change and the disaster hazard areas, natural land conditions were analyzed with GIS.

  5. Library Resource
    Documents de politique et mémoires
    octobre, 2009

    Agricultural sectors play a key role in the economics of climate change. Land as an input to agricultural production is one of the most important links between economy and the biosphere, representing a direct projection of human action on the natural environment. Agricultural management practices and cropping patterns have a vast effect on biogeochemical cycles, freshwater availability and soil quality. Agriculture also plays an important role in emitting and storing greenhouse gases.

  6. Library Resource
    Articles et Livres
    décembre, 2007
    Europe

    In Europe, grassland is one of the dominant forms of land use. Within 20 years, the area of permanent grasslands and pastures in Western Europe has declined by 12%. Semi-natural grasslands are often hot spots of biodiversity and are threatened both by intensive farming and by the abandonment of farmland in marginal areas. In this review, we show that biodiversity, climate change, C sequestration and farming systems issues are highly interconnected in grassland ecosystems.

  7. Library Resource
    Articles et Livres
    décembre, 2016
    Sri Lanka

    The island of Sri Lanka is free from serious natural hazards such as volcanic activity and earthquakes resulting from climatic extremes, but there are impacts of many natural disasters, such as landslides, floods and droughts, the intensity and frequency of which are increasing due to human interventions. Some areas of Sri Lanka are also periodically subject to cyclones that occur due to climatic conditions and geographical locations. Land degradation denotes all natural or anthropogenic processes that diminish or impair productivity of land.

  8. Library Resource
    Articles et Livres
    juillet, 2017
    Macédoine du Nord

    This paper presents data about forestry and reforestation in the Republic of Macedonia. The country is characterized with great diversity of natural conditions and rich floral and faunal biodiversity Forests in Macedonia cover 38% of its territory. About 71% represent coppiced and degraded and 29% tall forests. Historical, social and natural conditions caused gradual deforestation, forest and land degradation. Foundations of artificial afforestation were laid in the first decade of XX century.

  9. Library Resource
    Articles et Livres
    décembre, 2013

    Poplars and willows provide society with ecosystem services. These include direct economic benefits such as wood, fibre, fuelwood and other forest products. They also include environmental benefits improving the lives of people, such as through rehabilitation of degraded land, restoration of forest landscapes and mitigation of climate change. All of these services support rural livelihoods, enhance food security, alleviate poverty and contribute to sustainable land use and rural development, particularly in developing countries.

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