relation: https://pure.iiasa.ac.at/id/eprint/13766/ title: Global assessment of nitrogen losses and trade-offs with yields from major crop cultivations creator: Liu, W. creator: Yang, H. creator: Liu, J. creator: Azevedo, L.B. creator: Wang, X. creator: Xu, Z. creator: Abbaspour, K.C. creator: Schulin, R. description: Agricultural application of reactive nitrogen (N) for fertilization is a cause of massive negative environmental problems on a global scale. However, spatially explicit and crop-specific information on global N losses into the environment and knowledge of trade-offs between N losses and crop yields are largely lacking. We use a crop growth model, Python-based Environmental Policy Integrated Climate (PEPIC), to determine global N losses from three major food crops: maize, rice, and wheat. Simulated total N losses into the environment (including water and atmosphere) are 44 Tg N yr− 1. Two thirds of these, or 29 Tg N yr− 1, are losses to water alone. Rice accounts for the highest N losses, followed by wheat and maize. The N loss intensity (NLI), defined as N losses per unit of yield, is used to address trade-offs between N losses and crop yields. The NLI presents high variation among different countries, indicating diverse N losses to produce the same amount of yields. Simulations of mitigation scenarios indicate that redistributing global N inputs and improving N management could significantly abate N losses and at the same time even increase yields without any additional total N inputs publisher: Elsevier date: 2016-12-01 type: Article type: PeerReviewed identifier: Liu, W., Yang, H., Liu, J., Azevedo, L.B. , Wang, X., Xu, Z., Abbaspour, K.C., & Schulin, R. (2016). Global assessment of nitrogen losses and trade-offs with yields from major crop cultivations. Science of The Total Environment 572 526-537. 10.1016/j.scitotenv.2016.08.093 . relation: 10.1016/j.scitotenv.2016.08.093 identifier: 10.1016/j.scitotenv.2016.08.093 doi: 10.1016/j.scitotenv.2016.08.093