A nitrogen balance for the region of Upper Austria is presented containing a short introduction to the method and materials used and the overall results with emphasis on the N balance for the atmosphere, agriculture and surface waters. It is shown that it was possible to obtain only with existing data an overall balance for nitrogen which takes all important nitrogen fluxes into consideration. Important results are: The biggest input of nitrogen (as NHX-N or NOX-N) into the atmosphere comes from agriculture, but also traffic and industrial processes play an important role. The N-losses from agriculture to the environment depend to a high extent on the rate of animal protein production. The N-input to surface waters from nonpoint source discharges is noticeably bigger than from point source discharges.

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