Food Dehydrators are one of the least expensive ways of preparing both short and long term food supplies. There are many variables that determine how long dehydrated food can be stored. Review the following link: Storage Life of Dry Foods.
Food dehydration, in addition to canning, is often the only way to store vegitables and fruits from your own garden beyond the growing season. Dehydrated foods often have more intense flavors and can be rehydrated for use in many recipes in addition to serving as a snack foods.