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.
the percentage of a rock's volume that is open space. Porosity is: the capacity of a rock to transmit fluids. Permeability is: the saturated zone. The near-surface zone where all pores are filled with water is called: Advertisement. a body of saturated rock or sediment through which water can move easily.