• Causarano, H. J., J. N. Shaw, A. J. Franzluebbers, D. W. Reeves, R. L. Raper, K. S. Balkcom, M. L. Norfleet, and R. C. Izaurralde, Simulating field-scale soil organic carbon dynamics using EPIC, Soil Sci. Soc. Am. J., 714, 11741185, 2007.
  • Conant, R. T., G. R. Smith, and K. Paustian, Spatial variability of soil carbon in forested and cultivated sites: Implications for change detection, J. Environ. Qual., 321, 278286, 2003.
  • Ellert, B. H., H. H. Janzen, and T. Entz, Assessment of a method to measure temporal change in soil carbon storage, Soil Sci. Soc. Am. J., 665, 16871695, 2002.
  • Guo, Y. Y., R. Amundson, P. Gong, and Q. Yu, Quantity and spatial variability of soil carbon in the conterminous United States, Soil Sci. Soc. Am. J., 702, 590600, 2006.
  • Jacquemoud, S., W. Verhoef, F. Baret, C. Bacour, P. J. Zarco-Tejada, G. P. Asner, C. François, and S. L. Ustin, PROSPECT + SAIL models: A review of use for vegetation characterization, Remote Sens. Environ., 1131, S56S66, 2009.
  • Janzen, H. H., C. A. Campbell, R. C. Izaurralde, B. H. Ellert, N. Juma, W. B. McGill, and R. P. Zentner, Management effects on soil C storage on the Canadian prairies, Soil Tillage Res., 473–4, 181195, 1998.
  • Lal, R., Soil carbon sequestration impacts on global climate change and food security, Science, 3045677, 16231627, 2004.
  • Lal, R., R. F. Follett, and J. M. Kimble, Achieving soil carbon sequestration in the United States: A challenge to policy makers, Soil Sci., 16812, 827845, 2003.
  • Mann, L. K., Changes in soil carbon storage after cultivation, Soil Sci., 1425, 279288, 1986.
  • Ogle, S. M., F. J. Breidt, M. Easter, S. Williams, K. Killian, and K. Paustian, Scale and uncertainty in modeled soil organic carbon stock changes for US croplands using a process-based model, Global Change Biol., 162, 810822, 2010.
  • Serbin, G., C. S. T. Daughtry, E. R. Hunt Jr., D. J. Brown, and G. W. McCarty, Effect of soil spectral properties on remote sensing of crop residue cover, Soil Sci. Soc. Am. J., 735, 15451558, 2009.
  • Smith, P., et al., Agriculture, Climate Change 2007: Mitigation of Climate Change—Contribution of Working Group III to the Fourth Assessment Report of the Intergovernmental Panel on Climate ChangeMetz, B., et al., 497540, Cambridge Univ. Press, Cambridge, U. K., 2007.
  • , Soil Survey Staff, (2006), Digital general soil map of the United States (STATSGO2), digital map and associated attribute tables, Soil Data Mart snapshot, 30 December 2009, Nat. Resour. Conserv. Serv., U.S. Dep. of Agric., Washington, D. C. (Available at
  • Thomson, A. M., R. C. Izaurralde, S. J. Smith, and L. E. Clarke, Integrated estimates of global terrestrial carbon sequestration, Global Environ. Change, 181, 192203, 2008.
  • Waltman, S. W., C. Olson, L. West, A. Moore, and J. Thompson, Preparing a soil organic carbon inventory for the United States using soil surveys and site measurements: Why carbon stocks at depth are important [CD-ROM], paper presented at the 19th World Congress of Soil ScienceBrisbane, Queensl., Australia1–6Aug., 2010.
  • West, T. O., et al., Cropland carbon fluxes in the United States: Increasing geospatial resolution of inventory-based carbon accounting, Ecol. Appl., 204, 10741086, 2010.
  • Yang, Y., J. Fang, P. Smith, Y. Tang, A. Chen, C. Ji, H. Hu, S. Rao, K. Tan, and J. He, Changes in topsoil carbon stock in the Tibetan grasslands between the 1980s and 2004, Global Change Biol., 1511, 27232729, 2009.