Answer: Porosity
Explanation: Porosity is the ratio of volume of pores to the total volume of soil. This ratio varies between 0 and 1, or between 0% and 100% as a percentage.
[tex]Porosity=\frac{\text {volume of pores}}{\text {Total volume}}\times 100\%[/tex]
Porosity is also called as void fraction and is a measure of the empty spaces present in a material. Thus a porous soil will have more amount of air and less porous soil will have less amount of air.
A porous soil is made from coarse particles that leave large gaps known as pores.
