Bulk density is a measure of the weight of dry soil in a given volume. The soil volume is the combined volume of solids and pores, which may contain air and/or water. Bulk density is typically measured by inserting a bulk density ring (cylinder) of known volume into the soil and then excavating around it to carefully remove both the ring and the surrounding soil. The soil is then dried and weighed. The bulk density of the soil (g/cm3) is equal to the dry weight of soil (g) divided by the soil volume (volume of the ring) (cm3).
