Here is what I found.
Earth, loam, dry, excavated - 1.25 tonne/cubic meter
Earth, moist, excavated - 1.44 tonne/cubic meter
Earth, wet, excavated - 1.60 tonne/cubic meter
Earth, dense - 2.00 tonne/cubic meter
Earth, soft loose mud - 1.73 tonne/cubic meter
Earth, packed - 1.52 tonne/cubic meter
Note that is the metric tonne, 1000 kilograms. I assumed you wanted that and not U.S. or U.K. tons