English Abstract A method of regional modelling and mapping of NO3
leaching from agriculture soils is presented and was used to assess
sensitivity of agriculture soils to NO3 leaching. Nitrate leaching was
calculated by an empirical model, describing steady state NO3 leaching as a
function of soil type, type of agricultural land use and depth of the
groundwater table. The model was implemented in a geographic information
system. Results of this study are a national N balance of agricultural
soils and an areal distribution of agricultural soils with regard to the
predicted NO3 concentration of the uppermost groundwater. From these
results it was concluded that NO3 pollution of the upper groundwater occurs
almost everywhere in sandy and loamy soils.