There were a total of 45 laboratories that voluntarily submitted data. No laboratory was compensated. Great appreciation is extended to all the laboratories that provided data. This summary simply would not exist without their generous contributions of time and personnel.

A&L Great Lakes Laboratories, Inc.

AgroEnviro Lab

AgroLab

AGVISE Laboratories

American Agricultural Laboratory, Inc.

Brookside Laboratories, Inc.

Dairy One Cooperative, Inc.

Farmers Edge Inc., CAN

Farmers Edge Inc., USA

GMS Laboratories, Inc.

Honeyland Ag Services

Midwest Laboratories

Minnesota Valley Testing Laboratories, Inc.  (MVTL)

PEI Analytical Laboratories

ServiTech Laboratories

SGS Agri-Food Laboratories Inc.

Sollio Agriculture

Spectrum Analytic Inc.

Stanworth Consultants

Stratford Agri Analysis

VAS, AgSource Laboratories, Iowa
VAS, AgSource Laboratories, Nebraska
VAS, AgSource Laboratories, Wisconsin

Ward Laboratories Inc.

Waters Agricultural Laboratories, Inc.

Waypoint Analytical 

Kansas State University Research and Extension, Soil Testing Laboratory

Michigan State University, Soil and Plant Nutrient Laboratory

Mississippi State University Extension Service, Soil Testing Laboratory

North Carolina Department of Agriculture

Oklahoma State University

Pennsylvania State University, Agricultural Analytical Services Laboratory

Rutgers University Soil Testing Laboratory

University of Arkansas Soil Testing and Research Laboratory

University of Connecticut Soil Nutrient Analysis Laboratory

University of Delaware Soil Testing Program

University of Florida Extension Soil Testing Laboratory

University of Georgia Extension Agricultural & Environmental Services Laboratories

University of Kentucky Lexington Soils Laboratory

University of Maine Analytical Laboratory and Maine Soil Testing Service

University of Missouri Soil and Plant Testing Laboratory

University of Vermont Agricultural and Environmental Testing Lab

University of Wisconsin Soil and Forage Laboratory

Virginia Tech Soil Testing Lab