This may help to
explain why the dried blueberry from pick-2 had a higher bulk
density than dried blueberry from pick-1. Among the grades A and
C; grade A had higher mean bulk density (0.876 g/ml) than grade C
(0.773 g/ml). As per the definition of grades of blueberries, grade C
is more mature than grade A. The size of the berry increases during
maturation due to continuous uptake of water (Perkins-Veazie,
2004). Small berries shrink more than large berries under the
same drying conditions (MacGregor (2005)).