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  • 1
    Electronic Resource
    Electronic Resource
    Investigations into nitrogen sources and supply in reclaimed colliery spoil (1986)
    Springer
    Plant and soil 91 (1986), S. 181-194 
    Details
    ISSN: 1573-5036
    Keywords: Colliery spoil ; Grass cultivar ; Legumes ; Nitrogen sources ; Nitrogen supply ; Phosphate level pH ; Reclamation
    Source: Springer Online Journal Archives 1860-2000
    Topics: Agriculture, Forestry, Horticulture, Fishery, Domestic Science, Nutrition
    Notes: Summary Two trials were established to investigate the supply of nitrogen from ammonium and nitrate fertilizers, slow release nitrogen fertilizers, an organic nitrogen fertilizer and a legume, at two phosphate levels, to eight grass cultivars on colliery spoil. Spoil nitrogen supply and chemical characteristics and herbage dry matter and nitrogen yields were monitored for up to seven years. pH and conductivity fell at both sites. pH trends appeared to be independent of nitrogen treatment. Nitrogen in the ammonium form gave better yields than in the nitrate form when 125 kg N ha−1 was supplied in a season but there was no difference when 62.5 kg N ha−1 was applied. Slow release forms of nitrogen gave better yields more evenly distributed over the season than one application of ammonium sulphate per season. Once established white clover (Trifolium repens) plots had a more consistent nitrogen supply, more evenly distributed yield and better quality herbage than nitrogen fertilizer plots.Lolium perenne yielded poorly at low fertility.Festuca rubra andAgrostis castellana, although establishing slowly, yielded well under high and low fertility.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF02181786
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Terrestrial ecosystem sensitivity to acidic deposition in developing countries (1995)
    Springer
    Water, air & soil pollution 85 (1995), S. 2319-2324 
    Details
    ISSN: 1573-2932
    Keywords: sensitivity ; buffering ; acidification ; vegetation effects ; soil ; Al toxicity ; GIS ; mapping ; nutrient
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Acidic deposition is considered a problem in Europe and North America but the potential for ecosystem damage from this pollution is also increasing rapidly in many developing countries. It is therefore important to assess current and future risks of ecosystem effects due to acidic deposition in these areas. It is possible to indicate risk areas by linking an assessment of sensitivity to net acidic input rates derived from deposition estimates for sulphur and nitrogen compounds and base cations. A method to assess and map a relative scale of terrestrial ecosystem sensitivity using international datasets is presented. The assessment relies on the determination of buffering mechanisms that prevent effects related to acidic deposition. Land-cover data, edaphic and climate datasets are combined using a GIS. Large areas are assessed as highly sensitive to acidic deposition in tropical regions of Asia, South and Central America and Africa, and also in the Boreal forests of northern Asia. Sensitive areas cover forest and non-forest ecosystems and some areas of agricultural production. Critical loads are not evaluated in this project but initial estimates will be applied to sensitivity classes at a further stage which will allow estimation of areas at risk by comparison with deposition.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01186180
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    Paper (German National Licenses)
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  • 3
    Electronic Resource
    Electronic Resource
    Developing optimal abatement strategies for the effects of sulphur and nitrogen deposition at European scale (1995)
    Springer
    Water, air & soil pollution 85 (1995), S. 2601-2606 
    Details
    ISSN: 1573-2932
    Keywords: Integrated Assessment Modelling ; eutrophication ; acidification
    Source: Springer Online Journal Archives 1860-2000
    Topics: Energy, Environment Protection, Nuclear Power Engineering
    Notes: Abstract Integrated Assessment Models were successfully used to provide input to the negotiations for the Oslo Protocol on Further Reductions of Sulphur Emissions, finalized within the United Nations Economic Commission for Europe Convention on Long-range Transboundary Air Pollution in Oslo in June 1994. The techniques developed within this framework will be extended now to the simultaneous analysis of sulphur and nitrogen deposition. In addition to acidification, atmospheric deposition of nitrogen contributes to eutrophication of certain ecosystems, through a nutrient effect, and originates from the long-range transport of emissions of both oxidised and reduced nitrogen (NOx and NH3). Modelling reductions in nitrogen deposition thus introduces a need to establish multi-pollutant multi-effect modelling techniques. This paper investigates the development of a model set up to examine reductions of these pollutants in an economically and environmentally efficient manner. The control of nitrogen deposition encompasses action across several economic sectors, particularly the power, transport and agricultural sectors. Combining sulphur and nitrogen deposition limits on a European scale will require a flexible modelling approach and the issues governing possible approaches are presented.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF01186226
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    Paper (German National Licenses)
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