 Soil Quality Indicators: Bulk Density by USDA Natural Resources Conservation Service

Primary source: www.nrcs.usda.gov/sites/default/files/2023-01/Soil%20Quality-Indicators-Bulk%20Density.pdf

Verified locator: June 2008, 2 pages. Page 1: definition, Factors Affecting, Relationship to Soil Function. Page 2: Measuring Bulk Density, cylindrical core, drying and weighing equipment. No universal growth threshold or universal particle density inferred.