In addition to other nitrogen sources, nitrogen emissions from agriculture pollute waters and other environmental media … the impact of the Hessian water protection advisory service in the context of the EU Water Framework Directive on nitrogen …

nitrogen fertilization rate, b) adjustment of sowing date, c) implementation of new cultivars, and d) supplementary irrigation … global datasets at 0.5° x 0.5° spatial resolution. The nitrogen and cultivar packages were tested for all six countries … improvements across the packages were obtained by increase in nitrogen application rate, assuming that other nutrients like …