The 17th International Nitrogen Workshop will focus on iNNovations, with a capital N, for sustainable use of nitrogen resources. New breakthroughs in science; new breakthroughs in knowledge transfer, new breakthroughs in management of nitrogen resources. We need innovative solutions to meet the challenges of 2050, and this Workshop will provide the platform to discuss the challenges and solutions. To facilitate this discussion, each of the N workshop sessions will focus on a central pertinent question. Together, we will endeavour to answer each question in workshop style. The Call for Papers has been announced and we look forward to your contribution!