Breadcrumb Ag Home Directory John Barr Title John Barr Position Chemist Extension Leadership Team Part time Email john.barr@ndsu.edu Offices Plant Sciences Mailing address: NDSU Dept 7670, PO Box 6050 Fargo, ND 58108-6050 Physical address: Harris 237, NDSU Fargo, ND 58102 Phone 701-231-8089 ID