4 . 2 . Har6esting method
The method of harvest can determine the ex- tent of variability in maturity and physical in- juries, and consequently influence nutritional composition of fruits and vegetables. Mechanical injuries such as bruising, surface abrasions, and cuts can result in accelerated loss of vitamin C. The incidence and severity of such injuries are influenced by the method of harvest and handling operations. Proper management to minimize physical damage to the commodity is a must whether harvesting is done by hand or by ma- chine. Strawberries and other berries lost vitamin C quickly if bruised during harvesting (Ezell et al., 1947). Mondy and Leja (1986) found a very large decrease in AA content of the bruised tissue of potato tubers, while the unbruised halves appeared to show an increase in their AA con- tent.