Delaware University of Delaware Dept. of Plant and Soil Sciences
Georgia University of Georgia Ag & Environmental Service Labs
Indiana LandOLakes (Sure-Tech Labs) Indianapolis, Indiana
New Jersey Rutgers Soil Testing Laboratory
North Carolina NCDA Agronomic Division Raleigh, North Carolina
Ohio Spectrum Analytic, Inc. Washington Courthouse, Ohio
Brookside Lab, Inc.New Knoxville, Ohio
Pennsylvania Pennsylvania State University 111 Agricultural Analytical Services Lab
Agri Analysis, Inc Leola, Pennsylvania
South Carolina Clemson University Agricultural Service Laboratory
Virginia A&L Eastern Laboratory Richmond, Virginia
Virginia Tech Virginia Tech Soil Testing Lab