3 PhD positions are available within the project “Optimal N for future agricultural landscapes: digital technologies to optimize tradeoffs”. The project aims at developing predictive tools to support site specific crop N management for optimal delivery of ecosystem services related to N. The project is composed of three sub-projects, with respective focuses on process understanding; upscaling; and predictive modelling. Within sub-project 3 on predictive modelling, we aim to derive spatially allocated crop rotations and nitrogen management schemes which minimize the probabilities of trade-offs between crop yields and nitrogen losses using an integrated state of the art soil organic matter model including nitrogen transformations within a cropping system model. We are offering a PhD position to be based in the Cropping System Analysis working group for three years (TVL13, 65%) starting from May 2021.