Principal Investigators
Kenneth Carroll, PhD
April Ulery, PhD
Content Advisors
Kenneth Carroll, PhD
April Ulery, PhD
Excecutive Producer
Jeanne Gleason, EdD
Instructional Design
Barbara Chamberlin, PhD
Learning Technology Specialist
Pamela N. Martinez, EdD
Studio Production Director
Adrián Aguirre
Production Coordinator
Amanda Chase
Adrián Aguirre
Anastasia Hames
John "CC" Chamberlin
Amy Smith Muise
Studio Support
Hector Gonzales
Patricia Clark
Esther Aguirre
Luis Barraza

Data for these interactive graphs was derived from the following program:

Schaap, M. G. (2002). Rosetta: A computer program for estimating soil hydraulic parameters with hierarchical pedotransfer functions (Version 1.2). The US Salinity Laboratory (USDA-ARS) and UC-Riverside. Retrieved from:

Link to US Salinity Laboratory (USDA-ARS) page for ROSETTA: