Systems and methods allow units of produce to be traced back to the fields in which the produce was grown. In the field, a harvest form is completed with harvest information at the time of the harvest. In some instances, labels having unique codes are used to label the produce in the field, and two additional labels are placed on the harvest form to associate a range of unique codes with the harvest information on the form. The labels used to label the produce can also be marked with a lot code and date at the time of harvest. In other instances, empty packages arrive at the field already marked with a range of associated unique codes. In the field, harvest information is recorded and associated with the range of unique codes by scanning one or more of the packages.