The United States Department of Agriculture (USDA) Farm Production and Conservation Business Center on behalf of USDA National Soil Survey Lab – Kellogg Soil Survey Lab requires three (3) Particle Siz... The United States Department of Agriculture (USDA) Farm Production and Conservation Business Center on behalf of USDA National Soil Survey Lab – Kellogg Soil Survey Lab requires three (3) Particle Size Distribution Analyzers and accessories that meet the established specifications listed within this Sources Sought Notice. The objective of this sources sought is to learn who within the industry carries required analyzers.