The overall objective of this work package is the economic analysis of new plant nutrition strategies in comparison with current approaches. This implies the investigation of economic viability and sustainability of proposed alternative plant nutrition approaches. Thus, standardised field experiments considering different plant nutrition strategies under different climatic and soil conditions characteristic for European agriculture have to be conducted (link to WP08) and analysed to allow a comparative cost benefit analysis between new and conventional strategies. Further scenario and/or simulation analyses of representative approaches will be conducted to depict the economic efficiency under varying (world) market and price conditions to approve their economic viability and sustainability. The economic results will support WP10 in terms of implementing the results into marketing, training and public dissemination strategies.