I think it depends how long you plan on storing it for. If it is just used throughout the year, rotated, you dont need to do anything special. I have fruit slices, parsley, sliced green onion, diced onion, kale leaves, a year or two just in jars. But, more than that, I would put in an O2 absorber. Powdered veggies I would treat the same. I personaly wouldnt powder the fruit, so no comments on that, but sliced fruit I would put in an O2 absorber. Most important thing is to dry on low heat, but to dry thourougly
