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| | 1:00 PM | A Tribute to Aldo Leopold |
| 50-1 | 1:10 PM | SOILS AND THE PROVISION OF ECOSYSTEM SERVICES: MATSON, Pamela, School of Earth Sciences, Stanford Univ, Stanford, CA 94305, matson@stanford.edu. |
| 50-2 | 1:30 PM | TWO VIEWS OF HOW SOILS SUSTAIN US: AGRICULTURAL VS. GEOCHEMICAL CYCLES: KELLER, C. Kent, Dept of Geology, Wash. St. Univ, Box 642812, Pullman, WA 99164, ckkeller@wsu.edu. |
| 50-3 | 1:50 PM | A FALSE HYPOTHESIS? IMPLICATIONS FOR AGRICULTURE AND CULTURE IF TRUE: JACKSON, Wes, The Land Institute, 2440 E. Water Well Road, Salina, KS 67401, jackson@landinstitute.org. |
| 50-4 | 2:10 PM | SOIL AND SOCIETY: CHESWORTH, Ward, Univ of Guelph, Guelph, ON, wcheswor@lrs.uoguelph.ca. |
| 50-5 | 2:30 PM | A PROPOSED CONTINENTAL-SCALE SOIL GEOCHEMICAL SURVEY OF NORTH AMERICA: ESTABLISHING A DATABASE FOR THE 21ST CENTURY: SMITH, David B.1, GOLDHABER, Martin B.2, HELSEL, Dennis R.3, GARRETT, Robert G.4, WILSON, Michael A.5, BURT, Rebecca5, and GÓMEZ DE LA ROSA, Enrique6, (1) U.S. Geol Survey, Denver Federal Center, Box 25046, MS 973, Denver, CO 80225, dsmith@usgs.gov, (2) Crustal Team, U.S. Geol Survey, MS 973 Box 25046, Denver Federal Center, Denver, CO 80225, (3) Crustal Imaging and Characterization, USGS, Denver Federal Center, MS 973, Denver, CO 80225, (4) Geol Survey of Canada, 601 Booth Street, Ottawa, ON K1A 0E8, Canada, (5) Nat Rscs Conservation Service, 100 Centennial Mall North, Room 152, MS 41, Lincoln, NE 68508, (6) Consejo de Recursos Minerales, Blvd. Felipe Angeles s/n, Col. Venta Prieta, Pachuca, C. P. 42080, Mexico |
| 50-6 | 2:45 PM | USING SOILS TO UNDERSTAND ECOSYSTEM CHANGE IN WETLANDS IN PALO VERDE NATIONAL PARK, COSTA RICA: GALLAHER, Courtney M., Soil Science, Univ of Wisconsin - Madison, 1525 Observatory Drive, Madison, WI 53706-1299, cmgallaher@wisc.edu and STILES, Cynthia A., Soil Science, Univ of Wisconsin - Madison, 1525 Observatory Drive, Madison, WI 53709-1299 |
| 50-7 | 3:00 PM | Paper Withdrawn |
| | 3:15 PM | Aldo Leopold's Brand of Ecology by Estella Leopold |
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