Is uniformity of potato seed certification rules possible and desirable?

Conclusion

To renew the emphasis on the important phases: (1) Improvement of certification under competition has not culminated in uniformity. (2) National legislation cannot be carried out if based on tuber inspection alone, but requires a knowledge of the history of the crop. (3) Neither uniform rules nor all the knowledge that we now have would result in a uniform product from an attempt to inspect growing fields in different States. (4) Proof that certified seed is better on the average than uncertified seed does not prove that certain differences in rules cause certain differences in results. (5) National policing against individual offenders is not necessarily more effective than local policing. (6) At present a change to conformity promises a loss of advantages now enjoyed by Maine certified seed growers, and through that, a loss to the buyers of Maine certified seed.