Bulk Density Measurement Fact Sheets
Bulk density g/cm 3 = Dry soil weight g / Soil volume cm 3 Bulk density is usually expressed in megagrams per cubic metre Mg/m 3 but the numerically equivalent units of g/cm 3 and t/m 3 are also used 1 Mg/m 3 = 1 g/cm 3 = 1 t/m 3 Cresswell and Hamilton 2002 Critical values for compaction The critical value of bulk density for restricting root growth varies with soil type Hunt