Résultats de la recherche | Land Portal

Résultats de la recherche

Showing items 1 through 9 of 9514.
  1. Library Resource
    Articles et Livres
    décembre, 2017
    Pakistan

    A study was conducted in Sargodha, Pakistan during the year 2011 to testify irrigation practices as a method for reclaiming salt affected soil. Field experiments were conducted on saline-sodic and uncultivated land divided into 12 field plots. Six irrigation treatments, each replicated on two field plots, were applied to test the responses of soil and wheat crop yield.

  2. Library Resource
    Documents de politique et mémoires
    décembre, 2014
    Lettonie

    Study was conducted in north-eastern Latvia (57° 38’ N, 22° 17’ E): in a part of Slitere National Park that was un-managed since year 1923 and affected by large storm in November of 1969. Supervised classification of Corona and Landsat 5 images of the area (in total 1646 ha) from years before and after the storm (1966–2010) were carried out and parameters characterizing the fragmentation calculated for 3 land-cover classes: forest, areas with low woody biomass and non-forest areas.

  3. Library Resource
    Documents de politique et mémoires
    décembre, 2011
    Lettonie, Norvège

    Changes in soil morphological, physical and chemical properties as a result of establishing forest on agricultural lands were studied using as an example the lands naturally overgrowing in different periods of time by Norway spruce (Picea abies (L.) H. Karst.), silver birch (Betula pendula Roth.), grey alder (Alnus incana (L.) Moench) and aspen (Populus tremula L.). The research results showed that the soil with a texture of sandy loam and loam retains the morphological properties of agricultural land for up to 100 years.

  4. Library Resource
    Documents de politique et mémoires
    décembre, 2010
    Lettonie

    Attempts to estimate the allowable maximum population density is well known in the history of game management in Latvia. Relatively permanent environmental features (e. g. landscape and forest structure) have been used for the assessment of carrying capacity of hunting grounds. Amount of the available winter feed was considered as a limiting factor for major game species in each landscape unit and forest type. While focusing on the actual abundance of feed, many other factors, including mutual interaction among species and populations, were overlooked.

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