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Heavy metals in soils

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For the purposes of this Issue Paper, metals most commonly found at Superfund sites will be discussed in terms of the processes affecting their behavior in soils, as well as in those of the laboratory methods available to evaluate this behavior. The retention capacity of soil will also be discussed with regard to the movement of metals between the other environmental compartments: ground water, surface water, or the atmosphere. Long-term changes in soil environmental conditions, due to the effects of remediation systems or to natural weathering processes, are also explained with respect to the enhanced mobility of metals in soils.
A pot experiment on an acid brown soil was conducted in 1998-2000. Three multicomponent fertilizers were applied: Polifoska 8, Polifoska 8 + Cu, and Polimag 306, at the rates of 0.5; 1.0; and 1.5 g N per pot. The total forms of cadmium, lead, and nickel were determined in dry matter of perennial ryegrass with the use of ASA method. The contents of these elements were higher in the fertilized variants as compared to the control. No significant differences were found among the contents of investigated elements compared in plants treated with different multicomponent fertilizers. The increasing rates of nitrogen decreased soil pH and, thereby, enhanced the availability and concentration of heavy metals in perennial ryegrass.
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Nature 2000 - selected issues

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The EU Nature 2000 network is generally not a network of strictly protected areas in which no economic activities should take place. Therefore, in most Nature 2000 sites, a strict wilderness approach will not be the most appropriate form of management. This guidance document should therefore not be interpreted as the Commission aiming to turn all Nature 2000 sites into wilderness areas. However, in specific cases, a wilderness approach can be the most appropriate or even necessary management approach for specific Nature 2000 sites hosting habitat types and species of Community interest, the maintenance or restoration to a favourable conservation status of which is dependent on some degree of wilderness qualities and natural processes. Moreover, there will be sites for which a wilderness approach can be useful but not necessarily the only way to restore or maintain the species and habitats at a favourable conservation status. This guidance document is applicable to those specific Nature 2000 sites.
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