Spatial variability of soil carbon across Mexico and the United States

Rodrigo Vargas1, Mario Guevara1, Carlos Cruz Gaistardo2, Fernando Paz3, Bernardus de Jong3 and Jorge Etchevers3, (1)University of Delaware, Plant and Soil Sciences, Newark, DE, United States, (2)INEGI, Aguascalientes, Mexico, (3)COLPOS, Montecillo, Mexico