It is sometimes convenient to categorize packages by layer or function: primary, secondary, etc. 1  Primary packaging is the material that first envelops the product and holds it. 2  Secondary packaging is outside the primary packaging, and may be used to prevent pilferage or to group primary packages together.
Does Corn Need To Be Refrigerated? Corn does not typically need to be refrigerated in order for it to be safe to eat. You will want to be aware of the fact that the longer you keep your corn in the refrigerator, the more flavor and vitamins you will lose, so it will not have quite as much nutritional value or taste to it.
Be sure to harvest seeds from at least 100 plants to keep your seed population strong from year to year (see How To Avoid Inbreeding Depression in Corn, below). Sweet corn seeds remain viable for up to 3 years when properly stored; starchier dent, popcorn and flint corns can remain viable for 5 or more years.