Within\n the CDP framework, we are looking for a PhD candidate to enhance and \napply a spatially explicit crop and ecosystem models integrated with \nlife cycle impact assessment at EU scale. Agriculture is driving the \nglobal impacts on land and water use, as well as on eutrophication. The \nobjective of this PhD will be to find most sustainable practices for \nfood provision considering impacts on land and water related to the \nfertilization and irrigation. In the first phase, the PhD candidate will\n calibrate and validate the Phosphorus component of the JRC-D.3 \nbiogeochemical modelling framework (based on DAYCENT model) at European \nscale, on top of the already available Carbon and Nitrogen components. \nThis phase will also take advantage of the extensive soil sampling \nLUCAS, providing the main chemical soil properties and change for 2009 \nand 2015 at high spatial detail for ~22\u2019000 geo-referenced samples \ndistributed in 28 countries. In a second phase during her\/his stay in \nETHZ, the PhD candidate will integrate the modelling outputs (phosphorus\n flows from DayCent model) with a LCA framework (including inventory \ndata and impact assessment results). At a final stage, the PhD candidate\n will analyze the system-wide effects of different forms of nutrient \nsupply, including manure and other organic fertilizers (incl. mulching \nof intercrops), phosphate from mines and waste recovery, and synthetic \nnitrogen fertilizers. Organic fertilizer cannot be transported over \nlarger distances and is therefore not everywhere available. Additional \nlimitations of organic fertilizers include sub-optimal N\/P ratios and \nrequirement of land and water to either produce fertilizing intercrops \nor manure (as a by-product of meat and dairy). The PhD candidate will \nalso analyze different supply chains and related environmental impacts, \nbenefits and tradeoffs between various fertilization schemes with \nparticular emphasis on the P cycle.<\/p>\n\n\n\n