Detach petioles before leaving field.
Detach petioles from leaf
blades as soon as possible after collecting. The more promptly petioles are removed, the more accurate the nitrate nitrogen analysis will be.
NCDA&CS Agronomic Services Division, Colleen M. Hudak-Wise, Ph.D., Director
Mailing Address: 1040 Mail Service Center, Raleigh NC 27699-1040
Physical Address: 4300 Reedy Creek Road, Raleigh NC 27607-6465
Phone: (919) 733-2655; FAX: (919) 733-2837
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Steve Troxler, Commissioner of Agriculture