Spatial variability of soil carbon across Mexico and the United States

Rodrigo Vargas1, Mario Guevara2, Carlos Cruz Gaistardo3, Fernando Paz4, Bernardus de Jong4 and Jorge Etchevers4, (1)University of Delaware, Newark, DE, United States, (2)University of Delaware, Plant and Soil Sciences, Newark, DE, United States, (3)INEGI, Aguascalientes, Mexico, (4)COLPOS, Montecillo, Mexico