By Lyndsey Layton
In response to a new federal food safety law and growing consumer interest, vast amounts of new data are being generated about the complicated path that food takes from field to supermarket shelf.
And, increasingly, some of that information is being offered to curious shoppers, who in some stores can wave a smartphone above an apple or orange and learn instantly where it was grown, who grew it and whether it has been recalled. They can even contact the farmer, if they feel moved.