| Affiliation: | 1. Department of Soil, Water & Climate, University of Minnesota, 1991 Upper Buford Circle, St. Paul, MN 55108, USA;2. Instituto de Recursos Naturales y Agrobiología de Sevilla (IRNASE-CSIC), P.O. Box 1052, 41080 Seville, Spain;3. USDA-Agricultural Research Service, 1991 Upper Buford Circle, Rm. 439, St. Paul, MN 55108, USA;1. Department of Agricultural Sciences, University of Bologna, viale G. Fanin 44, 40127 Bologna, Italy;2. Departments of Earth Science, BioSciences, and Chemistry, Rice University, Houston, TX 77005, USA;3. Department of Earth Science, Rice University, Houston, TX 77005, USA |
