After the summer of the second year of growth the plant produces seeds. One individual can produce 100,000 to 180,000 seeds. These seeds are released in close proximity to the plant and can remain viable for over 100 years. The invasive common mullein prefers dry and sandy soils, but is adaptable to many soil types.
primary porosity. (geology). Natural porosity in petroleum reservoir sands or rocks. 1  Facebook. 2  Twitter.rimary porosity. (geology). Natural porosity in petroleum reservoir sands or rocks. 1  Facebook. 2  Twitter.
Porosity is the measure of the volume of void space (pore space), their size, and number, and permeability is the measure of how easily the water moves from pore space to pore space through a body such as rock or soil or how well they are interconnected.orosity is the measure of the volume of void space (pore space), their size, and number, and permeability is the measure of how easily the water moves from pore space to pore space through a body such as rock or soil or how well they are interconnected.