Soil Porosity

The space or gap between the mineral particles within a soil. Pore space will be filled by either air (which is technically called Air Filled Porosity) or water (which is technically called Water Filled Porosity), with roots and soil fauna also making use of the pore spaces. Soil porosity is usually expressed as a percentage of the soil volume. The theoretical maximum soil porosity for uniform particles is about 50%, although in practice the soil porosity for turf surfaces will be significantly less, may be in the region of 15% to 35%.