Van Arsdel
(1973) reported that the bulk density of food product dried to the
same water content is dependent on the rate of shrinkage; this in
turn is strongly affected by the drying method and the drying
conditions such as temperature and air flow within each method.
Similarly, longer drying times at 85 C in all drying methods might
have resulted in internal cell destruction and excessive shrinkage of
blueberries and hence high bulk density.