Soil Bulk DensitiesBy providing these weights at saturation level allows for an understanding of the maximum weight of each soil as the soil has been receiving heavy rains every day for two weeks. Under less wet weather the weight of the material tends much lower. It is also important to note that these weights are not only at saturation level but also under high compaction. It is standard that the soil, both in place and under a load, will be far less compacted. By using both compaction and field saturation to determine bulk density we can provide our customers with a “worst case scenario” in regards to weight, allowing hauling and engineering specifications to be considered when planning a project. Bulk density is highly correlated with porosity and free air space. For reference, per US Composting Council guidelines, Topsoil (dry) averages 1.73 tons per cubic yard and finished compost is targeted at 1200 pounds per cubic yard. As always, thanks for reading and please contact me if you have any questions.

Bulk densities of our soil products – measured at soil saturation levels

WM Soil Builder 1836 lbs. per cubic yard
WM Landscape Soil 1992 lbs. per cubic yard
WM Mixed Wood Mulch 628 lbs. per cubic yard
Sandy Loam 2056 lbs. per cubic yard
WM Vegetable Soil 1908 lbs. per cubic yard
Pine Bark Mulch 636 lbs. per cubic yard
WM Premium Compost 1724 lbs. per cubic yard
WM Turf Blend 2228 lbs. per cubic yard