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The primary objective of the study was the implementation of a new methodology to calculate soil surface nitrogen balances for European Union catchments. The methodology encompasses the use of CORINE Land Cover data to spatialise statistical information and the use of readily available geographical and agricultural datasets from the European Commission. A relational database program, NOPOLU, was used to calculate soil surface nitrogen balances.

The main conclusions of the study are:
- the use of NUTS 2 FARM census based N balnce simulations is appropriate for monitoring the trends in soil surface Nbalance estimates;
- there is still an important work of validation, homogenization of the technical coefficients available for estimatinfg soil-surface N balances;
- NOPOLU has proven to be an efficient tool for conducting scenario analysis;
- the inclusion of CORINE land cover in the modelling process improves the results at the administrative level.

Additional information

Authors: TERRES J M, European Commission, Joint Research Centre, Institute for Environment and Sustainability, Ispra (IT);CAMPLING P, KU Leuven Research & Development, Leuven (BE);VANDEWALL S, KU Leuven Research & Development, Leuven (BE);VAN ORSHOVEN J, KU Leuven Research & Development, Leuven (BE)
Bibliographic Reference: EUR 20256 EN (2002), 85pp. Free of charge
Availability: Available from European Commission, JRC Knowledge Management Unit, Ispra (IT) Tel: +39 033278 9843 or +39 033278 9864 Fax: +39 033278 9623 E-mail:
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