Field-level life cycle assessment (LCA) and uncertainty analysis for feedstock carbon intensity (CI) of corn ethanol and soybean biodiesel in the central U.S. Midwest

Ziqi Qin1, Yalin Li2, Kaiyu Guan3, Wang Zhou4, Bin Peng4, Jeremy S. Guest5, Greg J Thoma6, Jinyun Tang7, Zhenong Jin8, Robert F Grant9 and Lexuan Ye10, (1)Agroecosystem Sustainability Center, Institute for Sustainability, Energy, and Environment, University of Illinois at Urbana-Champaign,, Champaign, IL, United States, (2)University of Illinois at Urbana Champaign, Urbana, United States, (3)University of Illinois at Urbana Champaign, Department of Natural Resources and Environmental Sciences, College of Agricultural, Consumer and Environmental Sciences, Urbana, United States, (4)University of Illinois at Urbana Champaign, Agroecosystem Sustainability Center, Institute for Sustainability, Energy, and Environment, Urbana, United States, (5)University of Illinois at Urbana Champaign, Urbana, IL, United States, (6)University of Arkansas, Fayetteville, United States, (7)Lawrence Berkeley Natl Lab, Climate and Ecosystem Sciences Division, Berkeley, United States, (8)University of Minnesota Twin Cities, Department of Bioproducts and Biosystems Engineering, Saint Paul, United States, (9)University of Alberta, Department of Renewable Resources, Edmonton, AB, Canada, (10)University of Illinois at Urbana Champaign, Department of Natural Resources and Environmental Sciences, Urbana, United States