    Serterce f Barbiri 6 commerce came Tuseday  | the @econd diay of the Mirfetertal Corference  ard Expo on Agricutural Science ard Technology    Sereerce © US Agriculture Secretary Ann  Vermmari — Kicke =—OfF— tha ~—three-clay  Mirtevertal Conference and Expo on Agricuttural  Science and Technology on Moreiay .