For example, if the volume of the pores ( V l + V g ) occupies half of the total volume, the value of dry density is half the value of the soil particle density.
(the volume of the pores; occupies; half of the total volume) (the value of dry density; is; half the value of the soil particle density)
the volume of the pores the value of dry density
occupies is
half of the total volume
half the value of the soil particle density