“The porosity of the soil determined how easily water could flow through it.”
“Initial porosity in well-sorted sand also is dependent on grain angularity, the porosity increasing with increase in angularity.”
“Soil structure, or the size and arrangement of particles, determines the porosity of the soil.”
porogen
Any of a mass of particles, of a specified shape and size, used to make pores in moulded structures used for tissueengineering (they are dissolved away after the structure has set)