![]() ![]() 2014) that can cause (multiple but not linearly-dependent) environmental impacts (Galloway et al. Due to low long-term storage of Nr in the agricultural system, Nr sources correspond approximately to Nr losses (Rockström et al. The total amount of N-fertilizer used for domestic production, imports and exports is 41 kg N/cap. Comparing consumption based and production based values shows, that Germany is a net-importing country of embodied N-fertilizer use with + 9 kg N/cap. From the resulting 31 kg N/cap consumption based N-fertilizer use, 60% are embodied in imports and 40 % used internally. To answer the question of Germany’s contribution to these agricultural Nr sources, through the total consumption of products and services, environmentally-extended multi-regional input-output (“MRIO”) analysis is applied to track and account, direct and indirect, N-fertilizer use through international supply chains in 2007. ![]() Mineral N-fertilizer application and biological nitrogen fixation by legumes (“BNF”) are main anthropogenic sources of reactive N (“Nr”), biophysical drivers of the disruption of the N-cycle and indicate the transgression of the Planetary Nitrogen Boundary (“PB N”, Rockström et al. Germany’s internal and external contribution to the transgression of the Planetary Nitrogen Boundaryģ.3.2 Accounting principles and terminologyģ.3.5 Downscaling the PB N and assessing the transgression Operationalization of the Planetary Nitrogen Boundary for GermanyĢ.3.2 Boundaries for consumption based Nrģ. The Planetary Boundary framework and the Planetary Nitrogen Boundaryġ.2.1 Foundation of the Planetary Nitrogen Boundaryġ.2.2 Definition and quantification of the Planetary Nitrogen BoundaryĢ. ![]()
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